FixVault
Home › Saturn › 2008 › Sky Base, Standard › Repair and Diagnosis › External Pages › Different car › Section 134 (Suspension Control System - Automatic Level Control (ASCM)) › Diagnostic Information & Procedures › DTC C0712 › Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2008 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, remove the ELC CMPRSR relay.
  2. Ignition ON, verify that a test lamp does not illuminate between the rear fuse block relay control circuit terminal 11 and ground.
    • If the test lamp illuminates, test the control circuit for a short to voltage.
  3. Verify that a test lamp illuminates between the rear fuse block B+ circuit terminal 15 and ground.
    • If the test lamp does not illuminate, test the relay B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the air suspension control module.
  4. Connect a test lamp between the B+ circuit terminal 15 and the control circuit terminal 11.
  5. Command the compressor relay ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
    • If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the air suspension control module.
    • If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the air suspension control module.
  6. If all circuits test normal, test or replace the ELC CMPRSR relay.
About FixVault