FixVault
Home › Cadillac › 2007 › Escalade EXT › Repair and Diagnosis › Electrical › Charging Systems › Battery, Charging System And Starting System › Diagnostic Information and Procedures › DTC P1668 › Circuit/System Testing

Circuit/System Testing

  1. With ignition ON, and the engine OFF, disconnect the generator harness and measure the voltage of the generator turn ON signal circuit, should read near 0 volts.
    • If greater than 0 volts, test the generator turn ON signal circuit for a short to voltage or replace the ECM.
  2. With ignition ON, and the engine running, the voltage of the generator turn ON signal circuit, should read over 3.5 volts.
    • If no voltage is measured, test the generator turn ON signal circuit for a short to ground, an open or a high resistance or replace the ECM.
  3. Refer to Charging System Test .
About FixVault