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A/C Cut Control System

CAUTION: If ECM replacement is instructed, always ensure ECM harness connector and ground circuit are okay. If either are suspect, repair as necessary and repeat testing to confirm ECM malfunction.
  1. Access ECM connectors behind glove box. Turn ignition on. Leave harness connectors attached to ECM. Backprobing connector, measure voltage between chassis ground and terminal No. 5 (Light Green/Red wire) at ECM E10 connector. See Figure. With A/C on, battery voltage should be present. With A/C off, 0-2 volts should be present.
  2. If voltage is as specified, replace ECM and retest. If voltage is not as specified, check for open or short in circuit between ECM andA/C control assembly. See appropriate wiring diagram in WIRING DIAGRAMS article. If circuit is okay, replace A/C control assembly.
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