| Input signals |
Output signals |
| Directly connected: |
Directly connected:
(power supply unless otherwise stated) |
Speed sensor, input shaft
(7/61):
- Provides information about the transmission input speed. Used for calculations such as the shifting process, to check lock-up and to run diagnostics for the hydraulic/mechanical functions in the transmission.
Speed sensor, output shaft
(7/62):
- Provides information about the transmission output speed. Used for calculations such as the vehicle speed and to run diagnostics for the hydraulic/mechanical function in the transmission.
Oil temperature sensor
(7/74):
- Provides information about the transmission oil temperature. This information is used to adjust the shift timings and the oil pressure.
Gear-shift position sensor
(3/71):
- Provides the transmission control module with information about the selected gear position. It only permits start when the gear selector is in positions P and N. The sensor consists of a permanent magnet which creates a magnetic field across a number of Hall sensors, creating a specific voltage for each gear shift.
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Shift solenoids,
(8/38-39, 8/72-74):
- The transmission control module checks which gear is active by activating the solenoids in different patterns.
Lock-up-solenoid,
:
- Adjusts the line pressure to a lock-up pressure. Also used for certain shifts.
Linear solenoid,
:
- Adjusts the line pressure to a shift pressure and is activated for certain gears.
Linear solenoid,
(8/71):
- Adjusts the linear line pressure when shifting and during the neutral check function.
Gear selector module (GSM)
(3/156):
- Controls the shift-lock solenoid in the gear selector assembly.
Engine control module (ECM)
(4/46):
- Start inhibition. Provides the engine control module (ECM) with a signal indicating whether the engine can be started or not.
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| Via serial communication: |
Via serial communication: |
Gear selector module (GSM)
(3/156):
- Indicates that the gear selector lever is locked in position P and provides information about the status of the button for winter mode (W). Also transmits a control signal during Geartronic shifting and provides information about fault status in the gear selector module (GSM) so that diagnostic trouble codes (DTCs) can be stored in the module as required.
|
Gear selector module (GSM)
(3/156):
- The transmission control module (TCM) transmits a signal to the gear selector module (GSM) indicating which LED to light on the gear selector assembly panel, depending on the gear that is selected.
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| Via Controller Area Network (CAN) communication: |
Via Controller Area Network (CAN) communication: |
Steering wheel module (SWM)
(3/254), via the central electronic module (CEM) (4/56):
- Cruise control, used to calculate acceleration depending on the position of the Resume and Set buttons.
Brake control module (BCM)
(4/16):
- Provides information about the vehicle speed and also the difference in speed between the left and right-hand wheels. Prevents upshifting if the difference in speed is above 40 km/h to protect the differential in the transmission.
Engine control module (ECM)
(4/46):
- Stop lamp switch ON/OFF, used during torque converter lock-up
- Engine coolant temperature (ECT), used for diagnostics for the transmission temperature sensor and for catalytic converter start-up (Cat-start)
- Engine speed (RPM) >400 RPM = engine running. Used to start the transmission oil pressure and diagnostic functions
- Engine speed (RPM). Used to check the slipping rate of the torque converter and the pressure build up, this affects the smoothness of shifting
- Kick-down. If the accelerator pedal (AP) is depressed and the throttle is wide open, the engine control module (ECM) transmits a signal to the transmission control module (TCM) about kick-down
- Present engine torque, used to check the line pressure of the transmission
- Throttle opening, used to calculate gear changes. Sport mode and kick-down
- Accelerator pedal (AP) position, used to calculate the gear-shift timing.
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Brake control module (BCM)
(4/16):
- Current gear, used to transmit a signal not to regulate when shifting
- Vehicle speed, used as a back-up.
Engine control module (ECM)
(4/46):
- Transmission temperature, used to compensate increased load at low oil temperatures
- Selected gear, used by the engine so that it can compensate for different loads
- Lock-up, used by the engine so that it can compensate for different loads
- Next gear planned by the transmission control module (TCM), is used by the engine so that the engine can compensate for different loads
- The request about reduced engine torque when shifting, the engine reduces the engine torque when shifting
- Torque limiting request, the engine limits the engine torque, depending on the current gear and if winter mode (W) is selected.
Driver information module (DIM)
(5/1):
- Current gear selector lever position. Used to display the lever position in the driver information module (DIM)
- Via the central electronic module (CEM), checking the warning lamps. The general warning lamp lights in the event of a fault
- Via the central electronic module (CEM), text message in the driver information module (DIM). The driver receives different error messages from the transmission control module (TCM)
- The transmission control module (TCM) transmits signals on the controller area network to the engine control module (ECM) to light the malfunction indicator lamp (MIL) in the driver information module (DIM) in the event of emissions related faults.
Central electronic module (CEM)
(4/56):
- The gear selector module (GSM) transmits a signal via the transmission control module (TCM) indicating that the gear selector is locked in position P. The central electronic module (CEM) uses this information to control the ignition switch interlock function
- The transmission control module (TCM) transmits a signal via the central electronic module (CEM) to light the back-up (reversing) lamp.
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