Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Chevrolet >> 2009 >> Chevy Express G2500, Van Cargo Extended, 6.6 6 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 6.6L LMM - DTC P2510 To DTC P2693 >> DTC P2510 >> Circuit/System Testing

Circuit/System Testing

    IMPORTANT: You must perform the Circuit/System Verification before proceeding with Circuit/System Testing.
  1. With the ignition ON, disconnect the ECM relay and observe with the scan tool for loss of communication.
    • If the scan tool can still communicate with the vehicle, test the IGN 1 voltage circuit supplied by the ECM relay for a short to voltage. If the circuits test normal, replace the ECM.
  2. With the ignition OFF, probe the relay control circuit at the underhood electrical center with a test lamp connected to battery voltage.
    • If the test lamp illuminates test the relay control circuit for a short to ground. If the circuits test normal, replace the ECM.
  3. With the ignition ON, probe the relay control circuit at the underhood electrical center with a test lamp connected to a good ground.
    • If the test lamp illuminates, repair the short to voltage.
    • If the test lamp does not illuminate, replace the relay.
scientia non olet · About Mike's Workshop Manuals