Test readings, control module connections: Remember
- Note the test conditions and use common sense when assessing the test result.
- The presented readings are with the ignition ON unless otherwise stated.
- First check that the control module has a power supply and is grounded.
- Then check all sensor inputs and signals from other systems.
- Finally, check the control module outputs. 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 should be checked more thoroughly.
- The specified test readings refer to those obtained with a calibrated Fluke 88/97 .
- The test values %(+) and ms(+) indicate the pulse ratio and pulse duration of the signal. A test instrument for measuring pulse ratio and pulse duration must be used. The (+) sign indicates a positive trigger pulse, TRIG+.
TERMINAL CONNECTOR SPECIFICATION
| Pin No. | Lead colour | Component/function | In/Out | Test conditions | Across | Test reading | See |
|---|---|---|---|---|---|---|---|
| 1 | BK | Ground | Out | Ignition ON | 1-B- | <0.5 V | SID UNIT GROUND |
| 2 | No connection | ||||||
| 3 | YE/WH | Steering wheel controls, ground | - | Ignition ON | 3-B- | <0.1 V | STEERING WHEEL CONTROLS |
| 4 | BK/WH | Rheostat, ground | - | Ignition ON | 4-B- | <0.1 V | RHEOSTAT |
| 5 | BU/GN | Outdoor temperature sensor ground | - | Ignition ON | 5-B- | <0.1 V | TEMPERATURE SENSOR, OUTDOOR |
| 6 | No connection | Temperature sensor, outdoor | |||||
| 7 | No connection | ||||||
| 8 | YE/GY | Battery Voltage +15 | In | Ignition ON | 8-B+ | <0.5 V | SID UNIT POWER SUPPLY |
| 9 | WH | Bus (-) | In/Out | Ignition ON | 9-1 | 2.5 V | BUS COMMUNICATION |
| 10 | BN | Filament monitor, front lights | In | Ignition ON | 10-1 | B+ | FILAMENT MONITOR, FRONT LIGHTS |
| 11 | YE/RD | Rheostat + | In | Ignition ON"Max." rheostat position. | 11-1 | 0 V | RHEOSTAT |
| "Min." rheostat position | 11-1 | 3.5 V | |||||
| 12 | No connection | ||||||
| 13 | No connection | ||||||
| 14 | No connection | ||||||
| 15 | RE/WH | Battery Voltage +30 | In | Ignition ON | 5-B+ | <0.5 V | SID UNIT POWER SUPPLY |
| 16 | GN | Bus + | In/Out | Ignition ON | 16-1 | 2.5 V | BUS COMMUNICATION |
| 17 | YE/WH | Horn, relay | Out | Ignition ON Horn NOT activated. | 17-1 | B+ | HORN |
| 18 | YE/BK | Steering wheel controls + (switches) | In | Ignition ON Press the following buttons: | - | STEERING WHEEL CONTROLS | |
| Horn | 18-1 | 0 V | |||||
| VOL - | 18-1 | 0.7 V | |||||
| VOL + | 18-1 | 1.2 V | |||||
| SRC | 18-1 | 1.8 V | |||||
| SEEK >> | 18-1 | 2.4 V | |||||
| << SEEK | 18-1 | 3.0 V | |||||
| NXT | 18-1 | 3.6 V | |||||
| Normal position | 18-1 | 4.2 V | |||||
| ON | 18-1 | 0 V | |||||
| 19 | YE/GN | Temperature sensor, outdoor | In | Ignition ON Temperature readings: | TEMPERATURE SENSOR, OUTDOOR | ||
| 10°C/50°F | 19-1 | 2.49 V | |||||
| 20°C/68°F | 19-1 | 1.72 V | |||||
| 30°C/86°F | 19-1 | 1.43 V | |||||
| 20 | BU/RD | Parking heater / auxiliary heater | Out | Activated | 20-1 | 0 V | |
| Not activated | 20-1 | B+ | |||||
| 21 | GY/WH | Washer fluid, level sensor | In | Washer fluid present (closed contact). | 21-1 | 0 V | WASHER FLUID LEVEL SENSOR |
| No washer fluid present (open contact). | 21-1 | B+ | |||||
| 22 | BK/GN | Coolant, level sensor | In | Coolant present (closed contact). | 22-1 | 0 V | WASHER FLUID LEVEL SENSOR |
| No coolant present (open contact). | 22-1 | B+ |
> = greater than; < = less than; alternating current (LP: LOGIC PROBE P = select pulse; p = visible pulse)