Signal description. Transmission control module (TCM)
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2006 Volvo S80, 2005 Volvo S80, 2004 Volvo S80, 2003 Volvo S80, and 2002 Volvo S80. However, it is still accessible from the selected car via links, so may be relevant.
All the values listed below are between the terminal in column 1 and terminal #A53 (signal ground), unless otherwise indicated in brackets.
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 | % duty = | duty cycle (pulse ratio) as a percentage (%) |
| t = | time in milliseconds (ms) |
Connector A terminals #A35 - #A70
| Breakout box terminal | Control module terminal | Signal type | Ignition on | Engine idling | Other |
|---|---|---|---|---|---|
| #A35 | #A35 | Power supply | Ubat | Supply from relay 2/101 CEM | |
| #A37 | #A37 | Signal, oil temperature sensor (OT) | Cold gearbox (+20°C): U=2.4 V Hot gearbox (+100°C): U=0.3-0.5 V |
U decreases with increasing temperature | |
| #A39 | #A39 | Signal, vehicle speed sensor (SP1) | Tooth against sensor: 14 mA Cover against sensor: 7 mA |
The sensor generates a pulsed signal (quadratic wave) with fixed pulse ratio when the pulse wheel rotates. Frequency increases with speed | |
| #A41 | #A41 | Signal, engine speed (RPM) sensor (SP2) | Tooth against sensor: 14 mA Cover against sensor: 7 mA |
The sensor generates a pulsed signal (quadratic wave) with a fixed pulse ratio when the pulse wheel rotates. Frequency increases with speed | |
| #A45 | #A45 | Signal, gear-shift position sensor C | Gear selector positions D, 4, 3 and L: U=0-0.5 V Other positions: U=0-2 V below Ubat |
The signal is grounded in positions D, 4, 3 and L | |
| #A46 | #A46 | Signal, gear-shift position sensor A | Gear selector position P, R, 4, 3: U=0-0.5 V Other positions: U=0-2 V below Ubat |
The signal is grounded in positions P, R, 4, and 3 | |
| #A47 | #A47 | Control signal, shift solenoid S4 | Activated: U=0-2 V below Ubat Not activated: Ulow |
The solenoid receives voltage when activated by the control module in 3rd, 4th and 5th gears | |
| #A48 | #A48 | Control signal, shift solenoid S3 | Activated: U=0-2 V below Ubat Not activated: Ulow |
The solenoid is supplied with voltage when activated by the control module in 1st, 2nd and 3rd gears | |
| #A49 | #A49 | Control signal, line pressure solenoid SLS | f=300 Hz Frequency is constant, independent of driving conditions. The signal duty cycle is modified when the line pressure is adapted | Voltage decreases with increasing throttle opening | |
| #A50 | #A50 | Control signal, shift solenoid S1 | Activated: U=0-2 V below Ubat Not activated: Ulow |
The solenoid is supplied with voltage when activated by the control module in 1st gear | |
| #A51 | #A51 | Control signal, lock-up solenoid SLU | f=300 Hz Frequency is constant, independent of driving conditions. The signal duty cycle is modified when the line pressure is adapted | The solenoid is supplied with voltage when it is activated by the control module | |
| #A52 | #A52 | Control signal, line pressure solenoid SLT | f=300 Hz Frequency is constant, independent of driving conditions. The signal duty cycle is modified when the line pressure is adapted | The solenoid is supplied with voltage when it is activated by the control module | |
| #A53 | #A53 | Power ground | Ulow | N/A | |
| #A54 | #A54 | Signal ground for the gear selector module (GSM) | Ulow | From 2001 - Connection #6 on the gear selector module (GSM) |
|
| #A55 | #A55 | Signal ground, oil temperature sensor (OTG) | Ulow | Ground | |
| #A57 | #A57 | Power supply, speed sensor (SP1) | U≈1 V <Ubat | N/A | |
| #A59 | #A59 | Power supply, engine speed (RPM) sensor (SP2) | U≈1 V < Ubat | N/A | |
| #B3 | #A63 | Signal, gear-shift position sensor PA | Gear selector position P, N, 4, L: U=0-0.5 V Other positions: U=0-2 V below Ubat |
The signal is grounded in positions P, N, 4, and L | |
| #B4 | #A64 | Signal, gear-shift position sensor B | Gear selector position R, N, D, 3: U=0-0.5 V Other positions: U=0-2 V below Ubat |
Signal grounded in positions R, N, D, 3 | |
| #B6 | #A66 | Control signal, shift solenoid S5 | Activated: U=0-2 V below Ubat Not activated: Ulow |
The solenoid is supplied with voltage when it is activated by the control module in position R and during shifting from 2nd to 3rd gear | |
| #B7 | #A67 | Signal ground, line pressure solenoid (SLSG) | U=Ulow | N/A | |
| #B8 | #A68 | Control signal, shift solenoid S2 | Activated: U=0-2 V below Ubat Not activated: Ulow |
The solenoid is supplied with voltage when activated by the control module in 1st and 5th gears | |
| #B9 | #A69 | Signal ground, lock-up solenoid (SLUG) | U=Ulow | N/A | |
| #B10 | #A70 | Signal ground, throttle solenoid (SLTG) | U=Ulow | N/A | |
Connector B terminals #B1 - #B22
| Breakout box terminal | Control module terminal | Signal type | Ignition on | Engine idling | Other |
|---|---|---|---|---|---|
| #B11 | #B1 | Communication cable for the control modules (CAN) | 2-3 V | Between the transmission control module (TCM) and the engine control module (ECM) | |
| #B12 | #B2 | Communication cable for the control modules (CAN) | 2-3 V | Between the transmission control module (TCM) and the anti-lock brake system module (ABS) as well as the central electronic module (CEM) | |
| #B23 | #B13 | Communication cable for the control modules (CAN) | 2-3 V | Between the transmission control module (TCM) and the engine control module (ECM) | |
| #B24 | #B14 | Communication cable for the control modules (CAN) | 2-3 V | Between the transmission control module (TCM) and the anti-lock brake system module (ABS) as well as the central electronic module (CEM) | |
| #B31 | #B21 | VOLCANO lite communication cable | N/A | Between the transmission control module (TCM) and the gear selector module (GSM) | |
| #B32 | #B22 | Diagnostic lead C-link | N/A | N/A | |