Transmission Control Module Scan Tool Information (Allison)

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Scan Tool Data Parameters

Parameter	Expected Value	Description
Operating Conditions: Engine is at Idle, Upper Radiator Hose is Hot, Closed Throttle, Gear is in PARK, and Accessories are OFF.
1-2 Adapt Status Cell 0	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the 1-2 shift made with low engine torque has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
1-2 Adapt Status Cell 1	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the 1-2 shift made with medium engine torque has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
1-2 Adapt Status Cell 2	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the 1-2 shift made with high engine torque has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
1-2 TAP Cell 1	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during transmission shift between 1 and 2 with low engine torque.
1-2 TAP Cell 2	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during transmission shift between 1 and 2 with medium engine torque.
1-2 TAP Cell 3	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during transmission shift between 1 and 2 with high engine torque.
1-2 TAV Cell 1	CM³	Displays a range of 0-255 CM³ . This parameter indicates the adapted volume of transmission fluid the TCM commands to the on-coming clutch when the 1-2 shift is initiated.
2-1 Adapt Status 0% Throttle	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the 0% throttle 2-1 shift has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
2-1 Adapt Status Full Throttle	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the full throttle 2-1 shift has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
2-1 Adapt Status Lift Foot	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the full throttle detent 2-1 shift has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
2-1 Adapt Status Part Throttle	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the part throttle 2-1 shift has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
2-1 Adapt Status Pre-Select	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the 2-1 shift that is initiated by selecting a lower range with the transmission range selector lever or using the tap up tap down feature, has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
2-1 TAP Cell 1	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during the full throttle 2-1 shift.
2-1 TAP Cell 2	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during the part throttle 2-1 shift.
2-1 TAP Cell 3	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during the full throttle detent 2-1 shift.
2-1 TAP Cell 7	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during the 0% throttle 2-1 shift.
2-1 TAV Cell 1	CM³	Displays a range of 0-255 CM³ . This parameter indicates the adapted volume of transmission fluid the TCM commands to the on-coming clutch when the 0% throttle 2-1 shift is initiated.
2-1 TAV Cell 2	CM³	Displays a range of 0-255 CM³ . This parameter indicates the adapted volume of transmission fluid the TCM commands to the on-coming clutch when the 2-1 shift is initiated by selecting first range with the transmission range selector lever or using the tap up tap down feature.
2-3 Adapt Status Cell 0	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the 2-3 shift made with low engine torque has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
2-3 Adapt Status Cell 1	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the 2-3 shift made with medium engine torque has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
2-3 Adapt Status Cell 2	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the 2-3 shift made with high engine torque has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
2-3 TAP Cell 1	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during transmission shift between 2 and 3 with low engine torque.
2-3 TAP Cell 2	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during transmission shift between 2 and 3 with medium engine torque.
2-3 TAP Cell 3	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during transmission shift between 2 and 3 with high engine torque.
2-3 TAV Cell 1	CM³	Displays a range of 0-255 CM³ . This parameter indicates the adapted volume of transmission fluid the TCM commands to the on-coming clutch when the 2-3 shift is initiated.
3-2 Adapt Status 0% Throttle	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the 0% throttle 3-2 shift has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
3-2 Adapt Status Full Throttle	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the full throttle 3-2 shift has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
3-2 Adapt Status Lift Foot	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the full throttle detent 3-2 shift has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
3-2 Adapt Status Part Throttle	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the part throttle 3-2 shift has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
3-2 Adapt Status Pre-Select	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the 3-2 shift that is initiated by selecting a lower range with the transmission range selector lever or using the tap up tap down feature has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
3-2 TAP Cell 1	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during the full throttle 3-2 shift.
3-2 TAP Cell 2	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during the part throttle 3-2 shift.
3-2 TAP Cell 3	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during the full throttle detent 3-2 shift.
3-2 TAP Cell 7	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during the 0% throttle 3-2 shift.
3-2 TAV Cell 1	CM³	Displays a range of 0-255 CM³ . This parameter indicates the adapted volume of transmission fluid the TCM commands to the on-coming clutch when the 0% 3-2 shift is initiated.
3-2 TAV Cell 2	CM³	Displays a range of 0-255 CM³ . This parameter indicates the adapted volume of transmission fluid the TCM commands to the on-coming clutch when the 3-2 shift is initiated by selecting a lower range with the transmission range selector lever or using the tap up tap down feature.
3-4 Adapt Status Cell 0	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the 3-4 shift made with low engine torque has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
3-4 Adapt Status Cell 1	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the 3-4 shift made with medium engine torque has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
3-4 Adapt Status Cell 2	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the 3-4 shift made with high engine torque has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
3-4 TAP Cell 1	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during transmission shift between 3 and 4 with low engine torque.
3-4 TAP Cell 2	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during transmission shift between 3 and 4 with medium engine torque.
3-4 TAP Cell 3	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during transmission shift between 3 and 4 with high engine torque.
3-4 TAV Cell 1	CM³	Displays a range of 0-255 CM³ . This parameter indicates the adapted volume of transmission fluid the TCM commands to the on-coming clutch when the 3-4 shift is initiated.
4-3 Adapt Status 0% Throttle	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the 0% throttle 4-3 shift has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
4-3 Adapt Status Full Throttle	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the full throttle 4-3 shift has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
4-3 Adapt Status Lift Foot	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the full throttle detent 4-3 shift has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
4-3 Adapt Status Part Throttle	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the part throttle 4-3 shift has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
4-3 Adapt Status Pre-Select	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the 4-3 shift that is initiated by selecting a lower range with the transmission range selector lever or using the tap up tap down feature has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
4-3 TAP Cell 1	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during the full throttle 4-3 shift.
4-3 TAP Cell 2	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during the part throttle 4-3 shift.
4-3 TAP Cell 3	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during the full throttle detent 4-3 shift.
4-3 TAP Cell 7	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during the 0% throttle 4-3 shift.
4-3 TAV Cell 1	CM³	Displays a range of 0-255 CM³ . This parameter indicates the adapted volume of transmission fluid the TCM commands to the on-coming clutch when the 0% 1 throttle 4-3 shift is initiated.
4-3 TAV Cell 2	CM³	Displays a range of 0-255 CM³ . This parameter indicates the adapted volume of transmission fluid the TCM commands to the on-coming clutch when the 4-3 shift is initiated by selecting a lower range with the transmission range selector lever or using the tap up tap down feature.
4-5 Adapt Status Cell 0	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the 4-5 shift made with low engine torque has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
4-5 Adapt Status Cell 1	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the 4-5 shift made with medium engine torque has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
4-5 Adapt Status Cell 2	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the 4-5 shift made with high engine torque has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
4-5 TAP Cell 1	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during transmission shift between 4 and 5 with low engine torque.
4-5 TAP Cell 2	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during transmission shift between 4 and 5 with medium engine torque.
4-5 TAP Cell 3	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during transmission shift between 4 and 5 with high engine torque.
4-5 TAV Cell 1	CM³	Displays a range of 0-255 CM³ . This parameter indicates the adapted volume of transmission fluid the TCM commands to the on-coming clutch when the 4-5 shift is initiated.
4WD Low	Enabled/Disabled	Displays Enabled or Disabled. This parameter is the signal state of the four-wheel drive low circuit. Enabled indicates a 0 voltage signal requested 4WD low. Disabled indicates a B+ voltage signal, which does not request 4WD low.
5-4 Adapt Status 0% Throttle	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the 0% throttle 5-4 shift has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
5-4 Adapt Status Full Throttle	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the full throttle 5-4 shift has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
5-4 Adapt Status Lift Foot	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the full throttle detent 5-4 shift has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
5-4 Adapt Status Part Throttle	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the part throttle 5-4 shift has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
5-4 Adapt Status Pre-Select	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the 5-4 shift, that is initiated by selecting a lower range with the transmission range selector lever or using the tap up tap down feature, has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
5-4 TAP Cell 1	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during the full throttle 5-4 shift.
5-4 TAP Cell 2	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during the part throttle 5-4 shift.
5-4 TAP Cell 3	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during the full throttle detent 5-4 shift.
5-4 TAP Cell 7	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during the 0% throttle 5-4 shift.
5-4 TAV Cell 1	CM³	Displays a range of 0-255 CM³ . This parameter indicates the adapted volume of transmission fluid the TCM commands to the on-coming clutch when the 0% throttle 5-4 shift is initiated.
5-4 TAV Cell 2	CM³	Displays a range of 0-255 CM³ . This parameter indicates the adapted volume of transmission fluid the TCM commands to the on-coming clutch when the 5-4 shift is initiated by selecting a lower range with the transmission range selector lever or using the tap up tap down feature.
5-6 Adapt Status Cell 0	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the 5-6 shift made with low engine torque has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
5-6 Adapt Status Cell 1	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the 5-6 shift made with medium engine torque has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
5-6 Adapt Status Cell 2	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the 5-6 shift made with high engine torque has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
5-6 TAP Cell 1	kPa/psi	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during transmission shift between 5 and 6 with low engine torque.
5-6 TAP Cell 2	kPa/psi	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during transmission shift between 5 and 6 with medium engine torque.
5-6 TAP Cell 3	kPa/psi	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during transmission shift between 5 and 6 with high engine torque.
5-6 TAV Cell 1	CM³	Displays a range of 0-255 CM³ . This parameter indicates the adapted volume of transmission fluid the TCM commands to the on-coming clutch when the 5-6 shift is initiated.
6-5 Adapt Status 0% Throttle	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the 0% throttle 6-5 shift has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
6-5 Adapt Status Full Throttle	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the full throttle 6-5 shift has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
6-5 Adapt Status Lift Foot	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the full throttle detent 6-5 shift has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
6-5 Adapt Status Part Throttle	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the part throttle 6-5 shift has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
6-5 Adapt Status Pre-Select	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the 6-5 shift, that is initiated by selecting a lower range with the transmission range selector lever or using the tap up tap down feature, has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
6-5 TAP Cell 1	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during the full throttle 6-5 shift.
6-5 TAP Cell 2	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during the part throttle 6-5 shift.
6-5 TAP Cell 3	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during the full throttle detent 6-5 shift.
6-5 TAP Cell 7	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during the 0% throttle 6-5 shift.
6-5 TAV Cell 1	CM³	Displays a range of 0-255 CM³ . This parameter indicates the adapted volume of transmission fluid the TCM commands to the on-coming clutch when the 0% 6-5 throttle 6-5 shift is initiated.
6-5 TAV Cell 2	CM³	Displays a range of 0-255 CM³ . This parameter indicates the adapted volume of transmission fluid the TCM commands to the on-coming clutch when the 6-5 shift is initiated by selecting a lower range with the transmission range selector lever or using the tap up tap down feature.
Calc. Throttle Position	%	Displays a range of 0-100%. This parameter indicates the percent throttle provided by the ECM via GM LAN. In the cases where the transmission ISS is not supplied by the ECM and the TCM loses communication with the ECM, the TCM will calculate the throttle position based on converter slip speed. In all other instances, the Calc. Throttle Position will default to a value that is TCM calibration dependent.
Cold Shift Pattern	Disabled/Enabled	Displays Enabled or Disabled. This parameter indicates whether the transmission is operating under a cold shift strategy.
Current Gear	0-7	Displays 0, 1, 2, 3, 4, 5, 6, or 7. This parameter indicates the current transmission range attained as determined by the gear ratio.
Drive-Reverse Adapt Status Cell 0	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the Drive to Reverse shift has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
Driver Demanded Engine Torque	N.m (lb ft)	Displays a range of 0-9,999 lb ft. This parameter indicates the amount of torque that is requested by throttle angle and driving conditions.
Engine Run Time	Hr:Min:Sec	Displays a range of 0:00:00-18:12:15 hr/min/sec. This parameter measures the length of time the engine has been in operation during the present ignition cycle.
Engine Torque	N.m (lb ft)	Displays a range of 0-9,999 lb ft. This parameter is a calculated value based on engine load, throttle position, mass air flow, and other engine and transmission inputs. This parameter is accurate to within 15 lb ft of actual measured engine torque.
Gear Commanded	0-8	Displays a range of 0-8. This parameter indicates the commanded gear state from the transmission control module (TCM). When the vehicle is in the Neutral position this parameter displays 0. When the vehicle shift lever is placed in Drive, this parameter displays 1 while the vehicle is in first gear and changes accordingly as the vehicle shifts through 2, 3, 4, 5, and 6 This parameter displays 7 when reverse is commanded and 8 when the shift selector is in the park position.
Gear Ratio	Ratio	Displays a range of 0.000 to 8.00:1. This parameter is the actual gear ratio of the current commanded gear. The gear ratio is calculated by dividing the turbine speed by the output speed.
Gear Selected	0-8	Displays a range of 0-8. This parameter indicates the selected state of the gear selector. Park = 8, Reverse = 7, Neutral = 0, Drive = 6, M = 1, 2, 3, 4, 5 or 6 selected by tap up, tap down feature, and 1 =1 as the gear selector is moved through the ranges.
GS TAP From Drive 4 to R Cell 1	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during the Drive 4 to Reverse shift.
GS TAP From Neutral to D 1 Cell 1	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during the neutral to drive 1 shift.
GS TAP From Neutral to R Cell 1	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during the neutral to reverse shift.
GS TAP From Reverse to D 1 Cell 1	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the on-coming clutch immediately after the adapted volume has been commanded during the reverse to drive 1 shift.
GS TAP From Reverse to N Cell 2	kPa (psi)	Displays a range of 0-1600 kPa (0-232 psi). This parameter indicates the adapted pressure the TCM commands to the off-going during the reverse to neutral shift.
GS TAV From Drive 4 to R Cell 1	CM³	Displays a range of 0-255 CM³ . This parameter indicates the adapted volume of transmission fluid the TCM commands to the on-coming clutch when the Drive 4 to Reverse shift is initiated.
GS TAV From Neutral to D 1 Cell 1	CM³	Displays a range of 0-255 CM³ . This parameter indicates the adapted volume of transmission fluid the TCM commands to the on-coming clutch when the Neutral to D 1 shift is initiated.
GS TAV From Neutral to R Cell 1	CM³	Displays a range of 0-255 CM³ . This parameter indicates the adapted volume of transmission fluid the TCM commands to the on-coming clutch when the Neutral to Reverse shift is initiated.
GS TAV From Reverse to D 1 Cell 1	CM³	Displays a range of 0-255 CM³ . This parameter indicates the adapted volume of transmission fluid the TCM commands to the on-coming clutch when the GS TAV From Reverse to D 1 Cell 1 throttle garage shift is initiated.
Ignition Voltage	Volts	Displays a range of 0.0-25.5 Volts. This parameter indicates the voltage level on the ignition input to the TCM. The normal ignition voltage is approximately 13.8 volts, but may vary between 11-16 volts.
Last Output Speed Range Shift	RPM	Displays a range of 0-8,192 RPM. This parameter indicates the transmission output speed at which the last shift occurred.
Line PC Sol. Pressure Command	kPa (psi)	Displays a range of 0-232 psi. This parameter indicates the Line PC Solenoid commanded pressure. When the Line PC Solenoid is commanded ON, pressure from the Line PC Solenoid is directed to the line pressure regulator valve, which lowers the line pressure.
Max. Calc. Engine Torque Factor	Numeric Value	TBD
Max. Trans Calc. Engine Torque	N.m (lb ft)	Displays a range of ± 0-4 095 N.m (3,020 lb ft). This parameter indicates a calculated input torque that the TCM calculates based upon the engine speed and turbine speed when the TCC is not applied.
Neutral-First Adapt Status Cell 0	Slow/Fast	Displays Fast or Slow. This parameter indicates whether the Neutral to First shift has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
Neutral-Reverse Adapt Status Cell 0	Slow/Fast	Displays Fast or Slow. This parameter indicates whether the Neutral to Reverse shift has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
Neutral-Second Adapt Status Cell 0	Slow/Fast	Displays Fast or Slow. This parameter indicates whether the Neutral to Second shift has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
Next Output Speed for Downshift	RPM	Displays a range of 0-8,192 RPM. This parameter indicates the transmission output speed at which the next downshift will occur based on current driving requirements.
Next Output Speed Upshift	RPM	Displays a range of 0-8,192 RPM. This parameter indicates the transmission output speed at which the next upshift will occur based on current driving requirements.
Normal Shift Pattern	Enabled/Disabled	Displays Enabled or Disabled. This parameter indicates the transmission is operating under a normal shift pattern strategy.
PC Sol. 1 Pressure Command	kPa (psi)	Displays a range of 0-232 psi. This parameter is the commanded pressure of pressure control solenoid 1 which is directed through the one or more of the shift valves to a clutch.
PC Sol. 2 Pressure Command	kPa (psi)	Displays a range of 0-232 psi. This parameter is the commanded pressure of pressure control solenoid 2 which is directed through the one or more of the shift valves to a clutch.
Previous Gear	0-7	Displays 0-7. This parameter displays the most recent gear the transmission has attained. During an upshift or downshift it continues to display the previous gear until the TCM detects new gear position has been successfully completed.
Requested Torque	N.m (lb ft)	Displays a range of 0-9,999 lb ft. This parameter indicates the amount of torque required by the driver.
Reverse-First Adapt Status Cell 0	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the Reverse to First shift has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
Reverse-Second Adapt Status Cell 0	Fast/Slow	Displays Fast or Slow. This parameter indicates whether the Reverse to Second shift has adapted. The TCM continually monitors the shift pattern and makes changes as necessary to the TAV and TAP to improve shift quality. In fast adapt, the TCM will make large changes to make shift quality improvements. Once the TCM has made adjustments to improve a particular shift to an acceptable level, the status changes to Slow, and the TCM makes smaller changes to maintain good shift quality.
Service Brake Status Inverted	Enabled/Disabled	Displays Enabled or Disabled. This parameter indicates the status of the brake switch. Enabled indicates that the brake pedal is not depressed. Disabled indicates that the brake pedal is depressed.
Shift Solenoid 1	On/Off	Displays ON or OFF. This parameter is the commanded state of the shift solenoid 1 valve. On represents a commanded energized state, current is flowing through the solenoid. Off represents a non-commanded state, current is not flowing through the solenoid.
Shift Solenoid 2	On/Off	Displays ON or OFF. This parameter is the commanded state of the shift solenoid 2 valve. On represents a commanded energized state, current is flowing through the solenoid. Off represents a non-commanded state, current is not flowing through the solenoid.
Shift Solenoid 3	On/Off	Displays ON or OFF. This parameter is the commanded state of the shift solenoid 3 valve. On represents a commanded energized state, current is flowing through the solenoid. Off represents a non-commanded state, current is not flowing through the solenoid.
SSV1 Command Overide	On/Off	Displays ON or OFF. This parameter indicates if the TCM is overriding the normal SS1 command. If the TCM detects an incorrect pressure switch state, the TCM will command the shift solenoid ON and OFF in an attempt to get the shift valve to move in the bore.
SSV1 Modulation Count	Numeric Value	Displays a range of 0-255. This parameter indicates total number of times that SSV1 Command Override has been commanded by TCM.
SSV2 Command Overide	On/Off	Displays ON or OFF. This parameter indicates if the TCM is overriding the normal SS2 command. If the TCM detects an incorrect pressure switch state, the TCM will command the shift solenoid ON and OFF in an attempt to get the shift valve to move in the bore.
SSV2 Modulation Count	Numeric Value	Displays a range of 0-255. This parameter indicates total number of times that SSV2 Command Override has been commanded by TCM.
SSV3 Command Overide	On/Off	Displays ON or OFF. This parameter indicates if the TCM is overriding the normal SS3 command. If the TCM detects an incorrect pressure switch state, the TCM will command the shift solenoid ON and OFF in an attempt to get the shift valve to move in the bore.
SSV3 Modulation Count	Numeric Value	Displays a range of 0-255. This parameter indicates total number of times that SSV3 Command Override has been commanded by TCM.
TCC PC Sol. Pressure Command	kPa (psi)	Displays a range of 0-160 psi. This parameter indicates the commanded TCC pressure.
TCC Slip Speed	RPM	Displays -4,080 to +4,079 RPM. This parameter is the difference between the engine speed and transmission turbine speed. A negative value indicates the engine speed is less than the turbine speed, deceleration. A positive value indicates the engine speed is greater than the turbine speed.
TFP Switch 1	On/Off	Displays ON or OFF. This parameter indicates the state of pressure switch 1 of the pressure switch module. ON represents a 0 voltage signal indicating that shift valve 1 is in the stroked position and OFF represents a 5 volt reference voltage signal indicating shift valve 1 is in the destroked position.
TFP Switch 2	On/Off	Displays ON or OFF. This parameter indicates the state of pressure switch 2 of the pressure switch module. ON represents a 0 voltage signal indicating that shift valve 2 is in the stroked position and OFF represents a 5 volt reference voltage signal indicating shift valve 2 is in the destroked position.
TFP Switch 3	On/Off	Displays ON or OFF. This parameter indicates the state of pressure switch 3 of the pressure switch module. ON represents a 0 voltage signal indicating that shift valve 3 is in the stroked position and OFF represents a 5 volt reference voltage signal indicating shift valve 3 is in the destroked position.
TFP Switch 4	On/Off	Displays ON or OFF. This parameter indicates the state of pressure switch 4 of the pressure switch module. ON represents a 0 voltage signal indicating that the selector valve is in reverse and OFF represents a 5 volt reference voltage signal indicating the selector valve is neutral or a forward range.
TFP Sw. Dropout Counter	Numeric Value	Displays a range of 0-63. This parameter indicates the number of times that TFP switch dropout was detected.
TFP Sw. Dropout Detected	True/False	Displays False or True. This parameter indicates if the TCM has determined that pressure was lost to the TFP switches and the TCM logic indicates that this was due to a loss of transmission line pressure.
TFP Sw. Dropout Suspected	True/False	Displays true or false. This parameter indicates if the TCM has determined that pressure was lost to the TFP switches and the TCM logic indicates that may be due to a loss of transmission line pressure.
Torque Management Duty Cycle	% DC	Displays in a percent of Duty Cycle. This parameter indicates the amount of torque management being used by the transmission control module (TCM).
Tow/Haul Mode	Inactive/Active	Displays Active/Inactive. This parameter indicates whether the driver has placed the vehicle in the Tow/Haul mode. When this parameter is active, the TCM modifies the shift strategy by raising the shift points and applying the TCC in lower ranges.
TP Angle	Percent	Displays a range of 0-100 percent. The TP angle is computed by the PCM, from TP voltage. The TP angle should display 0 percent at idle and 100 percent at wide open throttle (WOT).
TR Sw.	Park, Reverse, Neutral, Drive, 4,3,2,1	Displays a range of Park, Reverse, Neutral, Drive, 5, 4, 3, 2, 1. The transmission range (TR) switch indicates the TR selected by the driver.
TR Sw. A/B/C/P	On/Off	Displays ON/OFF, ON/OFF, ON/OFF, ON/OFF. These parameters are four inputs from the internal mode switch assembly. ON represents a 5 volt reference voltage signal. OFF represents a 0 voltage signal.
Trans. Calc. Engine Torque	N.m (lb ft)	Displays a range of ± 0-4 095 N.m (3020 lb ft). This parameter indicates a calculated input torque that the TCM calculates based upon the engine speed and turbine speed when the TCC is not applied.
Trans. Fluid Temp.	°C (°F)	Displays -40°C to +151°C (-40°F to +304°F). This parameter is the input signal of the transmission fluid temperature sensor. The transmission fluid temperature is high when the signal voltage is low, and the transmission fluid temperature is low when the signal voltage is high.
Transmission Hot Mode	On/Off	Displays ON or OFF. When ON, the TCM changes the shift pattern which will increase engine speed to increase cooler flow.
Transmission ISS	RPM	Displays 0-8,192 RPM. This parameter measures the rotational speed of the torque converter, same as the engine speed, expressed as revolutions per minute (RPM). In some cases, parameter data is provided by the ECM via the GMLAN.
Transmission OSS	RPM	Displays 0-8,192 RPM. This parameter measures the rotational speed of the transmission output shaft expressed as RPM. On four-wheel drive applications, the transfer case output shaft speed is measured.
Turbine Speed	RPM	Displays 0-8,192 RPM. This parameter indicates the rotational speed of the torque converter turbine shaft expressed as RPM.

Scan Tool Output Controls

Output Control	Description
Shift Solenoids 1, 2, and 3	The TCM commands the shift solenoid ON and OFF. The scan tool solenoid parameter should match the commanded state. The scan tool Commanded Gear parameter should correspond with the shift solenoid combination. Refer to Solenoid and Clutch Chart (Tow/Haul) or Solenoid and Clutch Chart (Normal Mode) . When the ignition is ON, and the engine is OFF, there are no limits to this control. The solenoid remains ON until commanded OFF, and vice versa. When the output control is exited, the solenoid state is determined by the TCM. When the engine is running, control of Shift Solenoids 1, 2, and 3 is not allowed.
Clear TAP (Transmission Adaptive Pressures)	Allows the TCM to reset, the TAP cells to the original base value on individual shifts. There are no limits to using this output control. It may be performed with the engine running or when the ignition is ON, and the engine is OFF.
Clear ALL TAP Cells (Transmission Adaptive Pressures)	Allows the TCM to reset, the TAP cells to the original base value for all shifts. There are no limits to using this output control. It may be performed with the engine running or when the ignition is ON, and the engine is OFF.
PC Solenoid 1 and 2	The TCM commands the amperage, current, to the pressure control solenoid in order to control clutch pressure. For PC Solenoid 1, as the amperage increases, the clutch pressure decreases. As the amperage decreases, the clutch pressure increases. For PC Solenoid 2, as the amperage increases, the clutch pressure increases. As the amperage decreases, the clutch pressure decreases. The amperage range is 0.00-1.00. When the engine is running, control of PC Solenoids 1 and 2 is not allowed.
Shift Transmission	The TCM commands upshifts and downshifts. The scan tool Commanded Gear parameter should correspond with the shift solenoid combination. Refer to Solenoid and Clutch Chart (Tow/Haul) or Solenoid and Clutch Chart (Normal Mode) . When the ignition is ON, and the engine is OFF, there are no limits to this control. The scan tool shift solenoid states change to match the Commanded Gear selected. When the engine is running, the following control limits apply: The TCM does not allow a shift if it causes the engine RPM to exceed a calibrated limit. If a gear is requested and the engine speed is too high, the message "Engine speed too high" appears on the scan tool display. The TCM does not allow a downshift if the vehicle speed exceeds a calibrated limit. If a downshift is requested and the vehicle speed is too high, the message "Eng. is on and veh. speed too hi for downshift" appears on the scan tool display. The TCM does not allow an upshift that is greater than the current selected transmission range, PRNDL. For example, 3rd gear is not allowed if the transmission range is D2. If an upshift is requested that is greater than the current selected transmission range, the message "Eng. running and gear request is greater than the current TR" appears on the scan tool display.
TCC Control Solenoid	The TCM commands the duty cycle of the TCC PPC solenoid. The duty cycle is represented by a percentage of ON, energized, time. Approximately 90-100 percent duty cycle represents an ON, energized, commanded state. Zero percent represents an OFF, non-energized, commanded state. The scan tool TCC Duty Cycle parameter should match the commanded state. When the ignition is ON, and the engine is OFF, there are no limits to this control. The solenoid remains ON, 90-100 percent duty cycle, until commanded OFF, zero percent duty cycle, and vice versa. When the output control is exited, the solenoid duty cycle is determined by the TCM. When the engine is running, the following control limits apply: If the transmission range is Park, and the transmission is in hot mode, the TCC control solenoid may not be commanded OFF. If the solenoid is requested OFF, the message "TCC OFF command disabled in Hot Mode" appears on the scan tool display. The TCC control solenoid may not be commanded OFF for more than a calibrated amount of time. If the solenoid is commanded OFF, for a certain amount of time, the message "TCC OFF time has been exceeded" appears on the scan tool display.
Fast Learn Adapt Process	When the ignition is ON and engine is OFF, there are no limits to this control. FastLearn is a procedure for which a series of test are run to allow the transmission control module (TCM) to learn individual clutch characteristics. Once the clutch data is learned, FastLearn translates it to the adaptive data cells, which the TCM uses for clutch control during range shifts. Refer to FastLearn Procedure .
Preselect All TAP Cells (Transmission Adaptive Pressures)	Allows the TCM to reset, the TAP cells to the original base value on individual shifts. There are no limits to using this output control. It may be performed with the engine running or when the ignition is ON, and the engine is OFF.
Modulated Main Pressure Control Solenoid	The TCM commands the Modulated Main Pressure Control Solenoid ON and OFF. When the ignition is ON, and the engine is OFF, there are no limits to this control. The solenoid remains ON until commanded OFF, and vice versa. When the output control is exited, the solenoid state is determined by the TCM.