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Home >> Subaru >> 2017 >> BRZ Limited, Automatic Trans >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle (Diagnostics) >> Automatic transmission system >> DTC P0961, P0962, P0963: Pressure Control Solenoid "A" Control Circuit Range/Performance, Pressure Control Solenoid "A" Control Circuit Low, Pressure Control Solenoid "A" Control Circuit High >> Notes
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DTC P0961, P0962, P0963: Pressure Control Solenoid "A" Control Circuit Range/Performance, Pressure Control Solenoid "A" Control Circuit Low, Pressure Control Solenoid "A" Control Circuit High: Notes

Circuit description

Signals from the transmission control computer ASSY change the vehicle speed from 1st to 6th gear according to the combination of the transmission 3 way solenoid ASSY (S1, S2, S3, S4, SR) and the clutch control solenoid No. 1 (SL1, SL2). When there is an open or short circuit in the solenoid valve system, the transmission control computer ASSY stops continuity to all solenoids as the fail safe function. As a result, only the mechanical hydraulic circuit is available and the manual shift control is initiated.

DTC No. SAE/TCCS DTC detecting condition
  1. Diagnosis condition
  2. Abnormal status
  3. Abnormal period
  4. Others
 Inspection parts
P0961
  1. Learning control is not prohibited. SL1 solenoid system (Low/High) is not malfunctioning.
  2. The cumulative difference between clutch control solenoid No. 1 (SL1) operation set current and operation feedback current is 12 A or more.
  3. Abnormal status of item 2 is detected 2 times consecutively.
  4. trips
  • Clutch control solenoid No. 1 (SL1)
  • Transmission wire
  • Wiring harness or connector
  • Transmission control computer ASSY
P0962
  1. Learning control is not prohibited.

    1 second or more passed after clutch control solenoid No. 1 (SL1) is turned OFF.

  2. Clutch control solenoid No. 1 (SL1) operation feedback voltage is less than 0.018 V.
  3. 100 ms or more durations are detected 5 times consecutively.
  4. trips
  • Clutch control solenoid No. 1 (SL1)
  • Transmission wire
  • Wiring harness or connector
  • Transmission control computer ASSY
P0963
  1. Learning control is not prohibited.

    1 second or more passed after clutch control solenoid No. 1 (SL1) is turned ON.

  2. Clutch control solenoid No. 1 (SL1) operation feedback voltage is 0.257 V or more.
  3. 100 ms or more durations are detected 5 times consecutively.
  4. trips
  • Clutch control solenoid No. 1 (SL1)
  • Transmission wire
  • Wiring harness or connector
  • Transmission control computer ASSY

Monitor description

This diagnostic code indicates open or short circuit in the clutch control solenoid No. 1 (SL1). TCM switches ON/OFF of the shift solenoid valve to command shifting. If there is open or short circuit in any of the shift solenoid valve circuits, TCM detects the defect, turns on MIL, and records the diagnostic code.

MONITOR STRATEGY DESCRIPTION

Applicable diagnostic codes P0961: Pressure Control Solenoid "A" Control Circuit Range/Performance
P0962: Pressure Control Solenoid "A" Control Circuit Low
P0963: Pressure Control Solenoid "A" Control Circuit High
Required sensor/component Clutch control solenoid No. 1 (SL1)
Operation frequency Consecutive
Period P0961: 2 count
P0962: 0.1 seconds x 5 times
P0963: 0.1 seconds x 5 times
MIL operation Immediate
Operation order None

TYPICAL ENABLING CONDITIONS

TYPICAL ENABLING CONDITIONS DESCRIPTION

Battery voltage 10.2 V or more
Above condition is established 2 seconds or more
Fail safe mode (solenoid power supply shut down) Non-active
Clutch control solenoid No. 1 (SL1) (P0962, P0963) No defect
Check the feedback terminal voltage. 0.257V or less
Battery voltage 10.5V or more
Above condition (battery voltage) is established 0.5 seconds or more
TYPICAL ENABLING CONDITIONS DESCRIPTION

Battery voltage 10.2 V or more
Above condition is established 2 seconds or more
Fail safe mode (solenoid power supply shut down) Non-active
Clutch control solenoid No. 1 (SL1) (P0961) No defect
TYPICAL ENABLING CONDITIONS DESCRIPTION

Battery voltage 10.2 V or more
Above condition is established 2 seconds or more
Fail safe mode (solenoid power supply shut down) Non-active
Clutch control solenoid No. 1 (SL1) (P0961) No defect

TYPICAL MALFUNCTION THRESHOLDS

TYPICAL MALFUNCTION THRESHOLDS DESCRIPTION

Cumulative total of differences between target current and feedback current (Sum_ie) 12 A or more
When 1 or more conditions below are established, Sum_ie is deleted.
  1. The permission condition is not established.
  2. When the current difference (ie) between target and feedback is -50 mA to 50 mA
  3. Positive and negative of ie are reversed.
TYPICAL MALFUNCTION THRESHOLDS DESCRIPTION

Check the feedback terminal voltage. 0.018 V or less
Time elapsed after recovery from battery short circuit 1 second or more
TYPICAL MALFUNCTION THRESHOLDS DESCRIPTION

Check the feedback terminal voltage. 0.257V or more
Time elapsed after recovery from short circuit to ground/open circuit 1 second or more
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