Connected components
| 502A | TCM control module, connector A (LHD) |
|---|---|
| Via CRIMP CONNECTION J43, INSTRUMENT HARNESS . | |
| 25 | Hazard light switch |
| 61 | Windscreen wiper switch |
| 61a | Rear window wiper switch |
| 91 | Lamp, lighting, selector lever position indicator |
| 252R | Switch, heated rear seat |
| 375 | Connection, mobile phone / Connector OnStar |
| 439 | Solenoid, selector lever, SHIFT LOCK |
| 445 | Data link connector, 16-pin, CARB |
| 673 | Control module, OnStar |
| Via Crimp Connection J45, Instrument Harness | |
| 48F | Cigarette lighter, front |
| 48R | Cigarette lighter, rear (LHD) |
| 148F | Lamp, lighting, front ashtray/cigarette lighter |
| 148R | Lamp, lighting, rear cigarette lighter (LHD) |
| 216 | Control module, ACC |
| 220 | Ventilation fan control |
CONNECTED COMPONENTS CHART
Scheme 458
| Number of connector pins | Pcs | 40+6 |
|---|---|---|
| Power supply (+15 circuit) | Pin no. | 4 |
| Power supply +30 | Pin no. | 21 (2+3 on 6-pin for cars with seat heating) |
| Ground | Pin no. | 1 |
ACC UNIT SPECIFICATION
Scheme 459
Instructions and values for measuring the ACC unit are available on the following pages.
Remember
- Observe the test conditions. Use common sense when evaluating test results.
- First check that the control module is supplied with current and grounded. Then check all sensor inputs and signals from other systems. Check the control module outputs last. Remember that the test readings do not indicate whether or not the actuator is working.
- 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 a calibrated Fluke 88/97.
- The test readings show respectively the pulse ratio and pulse duration of the signal. A test instrument capable of measuring both pulse ratio and pulse duration must be used.
