Signal Specification, Transmission Control Module (TCM)
All the values given below apply between the respective terminal (column 1) and power ground (#A15). If this is not the case, it is indicated within brackets.
- Connector A (28-pin) corresponds to terminals #A1 - #A28 on the breakout box.
- Connector B (33-pin to transmission) corresponds to #B1 - #B33 on the breakout box.
NOTE:
Connect the breakout box and check the ground terminals before taking readings.
| U= | DC voltage in volts (V) | UAC = | AC voltage in volts (V) |
| Ubat = | Battery voltage | F = | Frequency in Hertz (Hz) |
| Ulow = | Voltage approximately 0 V | t = | Time in seconds (s) |
| PWM = | Pulse-width modulation |
CONNECTOR A, #A1 - #A28
| Terminal breakout box | Terminal control module | Signal type | Ignition on | Engine idling | Miscellaneous |
|---|---|---|---|---|---|
| #A1 | #A1 | Power supply | U = Ubat | U = Ubat | 30-feed (KL30) from fuse |
| #A2 | #A2 | Power supply | U = Ubat | U = Ubat | 15-feed (KL15) from ignition via fuse |
| #A3 | #A3 | - | - | - | |
| #A4 | #A4 | - | - | - | |
| #A5 | #A5 | - | - | - | |
| #A6 | #A6 | Electric oil pump control module, control signal. Only hybrid vehicles. |
Duty cycle varies with requested speed on the oil pump. | Pulse width modulation (PWM) signal | |
| #A7 | #A7 | Electric oil pump control module, status signal to Transmission Control Module (TCM). Only hybrid vehicles. |
- | Pulse width modulation (PWM) signal The signal contains the oil pump's status and speed. |
|
| #A8 | #A8 | - | - | - | |
| #A9 | #A9 | - | - | - | |
| #A10 | #A10 | - | - | - | |
| #A11 | #A11 | - | - | - | |
| #A12 | #A12 | - | - | - | |
| #A13 | #A13 | LIN, gear selector module (GSM) | During communication the following applies: U = 0 V - Ubat | - | |
| #A14 | #A14 | - | - | - | |
| #A15 | #A15 | Power ground | U = Ulow | U = Ulow | Ground point |
| #A16 | #A16 | - | - | - | - |
| #A17 | #A17 | - | - | - | - |
| #A18 | #A18 | Start inhibition, signal | U = Ulow when start is permitted | Signal to engine control module (ECM) if start is permitted. | |
| #A19 | #A19 | - | - | - | - |
| #A20 | #A20 | - | - | - | - |
| #A21 | #A21 | - | - | - | - |
| #A22 | #A22 | HS-CAN 1 L | During communication the following applies: U = 1.5 - 2.5 V | Designated in other information "HS-CAN". | |
| #A23 | #A23 | HS-CAN 1 H | During communication the following applies: U = 2.0 - 3.5 V | Designated in other information "HS-CAN". | |
| #A24 | #A24 | HS-CAN 2 L | During communication the following applies: U = 1.5 - 2.5 V | Designated in other information "HS-CAN". | |
| #A25 | #A25 | HS-CAN 2 H | During communication the following applies: U = 2.0 - 3.5 V | Designated in other information "HS-CAN". | |
| #A26 | #A26 | Gear blocking, shift lock solenoid for gear selector module (GSM), signal | Shift lock U = Ubat when the solenoid is not activated U = Ulow when the solenoid is activated |
Inactive solenoid = the gear selector is locked Active solenoid = the gear selector can be moved |
|
| #A27 | #A27 | Gear selector module (GSM), power supply | U = Ubat | U = Ubat | - |
| #A28 | #A28 | - | - | - | - |
CONNECTOR B, #B1 - #B33
| Terminal breakout box | Terminal control module | Signal type | Ignition on | Engine idling | Miscellaneous |
|---|---|---|---|---|---|
| #1 | #B1 | Lock-up solenoid SLU, control signal | PWM (U = 0 - 12 V). The solenoid receives voltage when transmission control module (TCM) activates it. | The frequency is constant (f = 300 Hz) regardless of driving conditions. It is the signal's duty cycle that is modified when the system pressure is adapted. | |
| #2 | #B2 | Lock-up solenoid SLU, signal ground | U = Ulow | U = Ulow | - |
| #3 | #B3 | Linear pressure solenoid SL3, control signal | PWM (U = 0 - 12 V). The solenoid receives voltage when transmission control module (TCM) activates it. | The frequency is constant (f = 300 Hz) regardless of driving conditions. It is the signal's duty cycle that is modified when the system pressure is adapted. | |
| #4 | #B4 | Linear pressure solenoid SL3, signal ground | U = Ulow | U = Ulow | - |
| #5 | #B5 | Linear pressure solenoid SL5, control signal | PWM (U = 0 - 12 V). The solenoid receives voltage when transmission control module (TCM) activates it. | The frequency is constant (f = 300 Hz) regardless of driving conditions. It is the signal's duty cycle that is modified when the system pressure is adapted. | |
| #6 | #B6 | Linear pressure solenoid SLT, control signal | PWM (U = 0 - 12 V). The solenoid receives voltage when transmission control module (TCM) activates it. | The frequency is constant (f = 300 Hz) regardless of driving conditions. It is the signal's duty cycle that is modified when the system pressure is adapted. | |
| #7 | #B7 | Linear pressure solenoid SLT, signal ground | U = Ulow | U = Ulow | - |
| #8 | #B8 | Linear pressure solenoid SL2, control signal | PWM (U = 0 - 12 V). The solenoid receives voltage when transmission control module (TCM) activates it. | The frequency is constant (f = 300 Hz) regardless of driving conditions. It is the signal's duty cycle that is modified when the system pressure is adapted. | |
| #9 | #B9 | Linear pressure solenoid SL2, signal ground | U = Ulow | U = Ulow | - |
| #10 | #B10 | Oil temperature sensor, signal | U=0-5 V | U=0-5 V | Analogue input ("Hall sensor"). |
| #11 | #B11 | Transmission speed sensor (output speed), signal | Tooth against sensor: 14 mA Cover against sensor: 6 mA |
When the toothed wheel rotates, the sensor generates a pulsating current (square wave) with fixed pulse ratio, the frequency increases with the speed. | |
| #12 | #B12 | Linear pressure solenoid SL5, signal ground | U = Ulow | U = Ulow | - |
| #13 | #B13 | Linear pressure solenoid SL1, control signal | PWM (0 - 12 V). The solenoid receives voltage when transmission control module (TCM) activates it. | The frequency is constant (f = 300 Hz) regardless of driving conditions. It is the signal's duty cycle that is modified when the system pressure is adapted. | |
| #14 | #B14 | Linear pressure solenoid SL1, signal ground | U = Ulow | U = Ulow | - |
| #15 | #B15 | - | - | - | |
| #16 | #B16 | - | - | - | |
| #17 | #B17 | Transmission speed sensor (input speed), signal ground | U = Ulow | U = Ulow | - |
| #18 | #B18 | Transmission speed sensor (input speed), signal | Tooth against sensor: 14 mA Cover against sensor: 6 mA |
When the toothed wheel rotates, the sensor generates a pulsating current (square wave) with fixed pulse ratio, the frequency increases with the speed. | |
| #19 | #B19 | Oil temperature sensor, signal ground | U = Ulow | U = Ulow | - |
| #20 | #B20 | Transmission speed sensor (output speed), signal ground | U = Ulow | U = Ulow | - |
| #21 | #B21 | Linear pressure solenoid SL4, control signal | PWM (U = 0 - 12 V). The solenoid receives voltage when transmission control module (TCM) activates it. | The frequency is constant (f = 300 Hz) regardless of driving conditions. It is the signal's duty cycle that is modified when the system pressure is adapted. | |
| #22 | #B22 | Linear pressure solenoid SL4, signal ground | U = Ulow | U = Ulow | - |
| #23 | #B23 | Gear shift solenoid S1, control signal | Activated: U = 0 - 2 V below Ubat Not activated: Ulow |
The solenoid receives voltage when transmission control module (TCM) activates it during engine braking in 1st gear. | |
| #24 | #B24 | - | - | - | - |
| #25 | #B25 | - | - | - | - |
| #26 | #B26 | - | - | - | - |
| #27 | #B27 | - | - | - | - |
| #28 | #B28 | Gear shift solenoid S2, control signal | Activated: U = 0 - 2 V below Ubat Not activated: Ulow |
The solenoid receives voltage when transmission control module (TCM) activates it during engine braking in 1st gear. | |
| #29 | #B29 | Electromagnetic oil pump EMOP, signal ground. Not present on hybrid vehicles. |
U = Ulow | U = Ulow | - |
| #30 | #B30 | Electromagnetic oil pump EMOP, control signal. Not present on hybrid vehicles. |
PWM (U = 0 - 12 V). The solenoid receives voltage when transmission control module (TCM) activates it. | The frequency is constant (f = 300 Hz) regardless of driving conditions. It is the signal's duty cycle that is modified when the system pressure is adapted. | |
| #31 | #B31 | - | - | - | - |
| #32 | #B32 | - | - | - | - |
| #33 | #B33 | - | - | - | - |