Points to remember
- Observe the test conditions, use your common sense when judging the readings obtained.
- The specified values are with the ignition in position ON unless stated otherwise.
- First check that the control module is supplied with current and grounded.
- Then check all sensor inputs and signals from other systems.
- Finally, check the control module inputs. Remember that the test readings do not indicate whether or not the actuator is in working order.
- If any reading is not OK, consult the wiring diagram to trace the leads, connectors or components which ought to be checked more thoroughly.
- The specified test readings refer to those obtained with a calibrated Fluke 88/97.
- Test readings %(+) and ms(+) indicate the signal's pulse ratio and pulse duration. A test instrument capable of measuring pulse ratio and pulse width must be used. The sign denotes a positive trigger pulse, TRIG+.
| Pin | Cable color | Component/ Function | In/Out | Test conditions | Test between | Test reading | See |
|---|---|---|---|---|---|---|---|
| 1 | BU/RD | Battery voltage (+15 circuit) | In | Ignition ON | 1-B+ | < 0.5 V | CONTROL MODULE POWER SUPPLY |
| 2 | WH/GN | Solenoid, Lock-up (SL) | Out | Ignition ON Activate with diagnostics instrument SOLENOID LOCKUP | 2-32 | ON=B+ OFF=0 V | SOLENOID VALVE SL, FOR LOCK-UP |
| 3 | No connection | ||||||
| 4 | WH/YE | Solenoid 2-3 (S2) | Out | Ignition ON Gear D Winter mode ON Winter mode OFF | 4-32 | 0 V B+ | SOLENOID VALVES, S1 AND S2, FOR SHIFTING |
| 5 | No connection | ||||||
| 6 | GN | NTC sensor for transmission fluid temperature | In | Ignition ON 20°C 50°C 80°C | 6-32 | 2.3 V 1.7 V 1.0 V | TRANSMISSION FLUID TEMPERATURE SENSOR |
| 7 | BU | Switch, SPORT | In | Ignition ON Switch activated Switch not activated | 7-32 | 0 V B+ | SPORT SHIFTING PROGRAM |
| 8 | No connection | ||||||
| 9 | GN | Bus+ | In/Out | Ignition ON | 9-32 | Approx. 2.5 V | BUS COMMUNICATION |
| 10 | WH | Bus | In/Out | Ignition ON | 10-32 | Approx. 2.5 V | BUS COMMUNICATION |
| 11 | No connection | ||||||
| 12 | No connection | ||||||
| 13 | BN | Gear selector position sensor, pin A | In | Ignition ON Selector lever P, R, 3, 2 Selector lever N, D, 1 | 13-32 | B+ 0 V | GEAR SELECTOR POSITION SENSOR - GEAR ENGAGED |
| 14 | OG/WH | Gear selector position sensor, pin C | In | Ignition ON Selector lever D, 3, 2, 1 Selector lever P, R, N | 14-32 | B+ 0 V | GEAR SELECTOR POSITION SENSOR - GEAR ENGAGED |
| 15 | GN/RD | Inductive sensor, output speed | In | Raise the car, engage 1st gear and run the engine at 20 km/h* | 15-30 | 0.9 V 140 Hz | OUTPUT SHAFT SPEED SENSOR |
| 16 | RD | Battery voltage (+30 circuit) | In | Ignition ON/OFF | 16-B+ | < 0.5 V | CONTROL MODULE POWER SUPPLY |
| 17 | WH/YR | Solenoid, pressure control (ST) Power supply | Out | Ignition ON | 17-32 | 5 V approx. 300 Hz | SOLENOID VALVE ST, FOR SYSTEM PRESSURE |
| 18 | WH/BK | Solenoid, pressure control (ST) Ground | In | Ignition ON | 18-32 | 0.9 V approx. 300 Hz | SOLENOID VALVE ST, FOR SYSTEM PRESSURE |
| 19 | WH/GN | Solenoid 1-2/3-4 (S1) | Out | Ignition ON Gear D Winter mode ON Winter mode OFF | 19-32 | B+ 0 V | SOLENOID VALVES, S1 AND S2, FOR SHIFTING |
| 20 | No connection | ||||||
| 21 | No connection | ||||||
| 22 | GN | Switch, WINTER | In | Ignition ON Switch activated Switch not activated | 22-32 | 0 V B+ | WINTER SHIFTING PROGRAM |
| 23 | No connection | ||||||
| 24 | No connection | ||||||
| 25 | No connection | ||||||
| 26 | No connection | ||||||
| 27 | No connection | ||||||
| 28 | VT | Gear selector position sensor, pin B | In | Ignition ON Selector lever R, N, D, 3 Selector lever P, 2, 1 | 28-32 | B+ 0 V | GEAR SELECTOR POSITION SENSOR - GEAR ENGAGED |
| 29 | GY | Gear selector position sensor, pin PA | In | Ignition ON Selector lever P, N, 3, 1 Selector lever R, D, 2 | 29-32 | B+ 0 V | GEAR SELECTOR POSITION SENSOR - GEAR ENGAGED |
| 30 | PK | Ground, signal ground for inductive sensor | In | Ignition ON | 30-B | < 0.1 V | CONTROL MODULE GROUND |
| 31 | BK | Ground | In | Ignition ON | 31-Good ground | < 0.1 V | CONTROL MODULE GROUND |
| 32 | BK | Ground | In | Ignition ON | 32-Good ground | < 0.1 V | CONTROL MODULE GROUND |
| 33 | No connection | ||||||
| 34 | No connection | ||||||
| 35 | No connection | ||||||
| 36 | No connection | ||||||
| 37 | No connection | ||||||
| 38 | No connection | ||||||
| 39 | No connection | ||||||
| 40 | No connection | ||||||
| 41 | No connection | ||||||
| 42 | No connection | ||||||
| 43 | No connection | ||||||
| 44 | PK | Ground, signal ground for inductive sensor | In | Ignition ON | 44-B | < 0.1 V | CONTROL MODULE GROUND |
| 45 | WH | Inductive sensor, input speed | In | Idling speed | 45-44 | Approx. 1.2 V 170 Hz | INPUT SHAFT SPEED SENSOR |
TRANSMISSION CONTROL MODULE TEST READINGS SPECIFICATIONS
*A vehicle speed reading can be obtained with the diagnostics instrument, command menu "Read functions" and "Output speed".
Scheme 555
| ° C (+/-10%) | Ohm (+/-10%) | V |
|---|---|---|
| 10 | 5000 | 4.6 |
| 0 | 2000 | 4.1 |
| +20 | 900 | 3.4 |
| +40 | 400 | 2.4 |
| +80 | 125 | 1.1 |
| +100 | 75 | 0.7 |
TRANSMISSION FLUID TEMPERATURE SENSOR VOLTAGE SPECIFICATIONS
Scheme 556
Power supply 5 V through 1 kOhm resistor in the control module.
Scheme 557
Scheme 558
| Location | On the transmission casing | |
|---|---|---|
| Fitting | Adjustment required for proper operation | |
| Type | Slip contacts | |
| Power supply (+15 circuit) | IG contact | |
| Function | Selector lever position | A, B, C and PA contacts |
| Starter motor interlock | SR contact | |
| Reversing lights | RL contact | |
| Resistance | Open contact | OL (.) |
| Closed contact | < 5 Ohm | |
GEAR SELECTOR POSITION SENSOR SPECIFICATIONS
Scheme 559
| Location | On the transmission casing | |
|---|---|---|
| Type | Inductive sensor | |
| Resistance, shift 1-2 at 20° C | Ohm | 450+/-150 |
| Toothed wheel | Number of teeth | 12 |
INPUT SPEED SENSOR SPECIFICATIONS
Scheme 560
| Location | On the transmission casing | |
|---|---|---|
| Type | Inductive sensor | |
| Resistance, shift 2-3 at 20°C | Ohm | 450+/-150 |
| Toothed wheel | Number of teeth | 18 |
OUTPUT SPEED SENSOR SPECIFICATIONS
Scheme 561
Scheme 562
| Location | In valve housing on transmission casing | |
|---|---|---|
| Resistance at 20°C | Ohm | 13+/-2 |
| Characteristics | Closed at zero current | |
SHIFTING SOLENOID VALVE SPECIFICATIONS (S1 AND S2)
Scheme 563
Scheme 564
| Location | In valve housing on transmission casing | |
|---|---|---|
| Resistance at 20°C | Ohm | 13+/-2 |
| Characteristics | Open at zero current | |
LOCK-UP SOLENOID VALVE SPECIFICATIONS (SL)
Scheme 565
| Location | In valve housing on transmission casing | |
|---|---|---|
| Resistance at 20°C | Ohm | 3.5+/-0.2 |
| Characteristics | Open at zero current | |
| Control voltage | PWM 12 V | 300 Hz |
PRESSURE CONTROL SOLENOID VALVE SPECIFICATIONS (ST)
Scheme 566
- Transmission range switch (245)
- Main instrument unit (540)
- Control module, Trionic (430/600)
- SID (541)
- Control module, TCM (502)
- Switch, WINTER (506)
- Switch, SPORT (537)
- Output shaft speed sensor (533)
- Input shaft speed sensor (532)
- Transmission fluid temperature sensor (535)
- Control module, TWICE (632)
- Lock-up solenoid (SL)
- Solenoid for shifting (S1)
- Solenoid for shifting (S2)
- Solenoid for system pressure (ST)
Scheme 567
The automatic transmission consists of the following principal components
- Gearbox
- Control module, (TCM) 502
- Solenoid valves for shifting, (S1 and S2) 531
- Solenoid valve for Lock-up, (SL) 531
- Solenoid valve for system pressure, (ST) 531
- Input shaft speed sensor, 532
- Output shaft speed sensor, 533
- Transmission fluid temperature sensor 535
- Gear selector position sensor 245