A/C Control Unit
Start engine and allow it to reach normal operating temperature. Locate A/C Control Unit (ACCU) 3-pin (14-pin on 2.0L Non-Turbo) connector. ACCU is located under blower motor. Inspect connector and wiring for damage. Repair as required. See Fig 1 or Fig 2 . Turn ignition on, A/C switch to ON position, temperature control to maximum cooling and blower switch to high. Using a DVOM set to appropriate test function, backprobe ACCU harness connector. Test readings should be as specified. See A/C CONTROL UNIT CIRCUIT TESTS table. If all test readings are as specified and all other components are within specifications, replace ACCU. If all test readings are not as specified, repair circuit(s) as required.
A/C CONTROL UNIT CIRCUIT TESTS
| Terminal No. (Circuit) | Value | |||
|---|---|---|---|---|
| Non-Turbo | ||||
| 1 (Compressor Relay) | Battery Voltage | |||
| 2 (ACCU Ground) | Battery Voltage | |||
| 4 (ACCU A/C Switch Power Supply) | Battery Voltage | |||
| 5 (ACCU Ignition Power Supply) | Battery Voltage | |||
| 7 (Pick-Up Sensor) | (1) | |||
| 8 (Fin Thermo Sensor Ground) | Zero Volts | |||
| 9 (ECM Power Supply Output) | Battery Voltage | |||
| 11 (A/C Switch Power Supply) | Battery Voltage | |||
| 12 (Fin Thermo Sensor Power Supply) | 5 Volts | |||
| Turbo & 2.4L | ||||
| 1 (ACCU Power Supply Output) | Battery Voltage | |||
| 2 (ACCU Power Supply Input) | Battery Voltage | |||
| 3 (ACCU Ground) | Zero Volts | |||
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