LEMON Manuals: Even more car manuals for everyone
Home >> Cadillac >> 2010 >> STS 3.6 V, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (Engine Controls And Fuel - 4.6L (LH2) - DTC P0010 To DTC P0333) >> DTC P0201, P0202, P0203, P0204, P0205, P0206, P0207, or P0208 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. Remove the engine sight shield.
  2. Ignition OFF, disconnect the affected fuel injector harness connector at the fuel injector.
  3. Ignition ON, verify that the test lamp illuminates between the ignition 1 voltage circuit terminal A and ground.
    • If the test lamp does not illuminate, test the ignition 1 voltage circuit for a short to ground or an open/high resistance.
  4. Connect the J 34730-405:  Test Lamp between the control circuit terminal B and the ignition 1 voltage circuit terminal A. Start the engine.
    • If the test lamp flashes, replace the fuel injector.
    • If the test lamp does not flash, test for an open, high resistance, or a short to voltage in the control circuit of the fuel injector. If the circuit tests normal, replace the ECM.
    • If the test lamp remains illuminated at all times, test for a short to ground in the control circuit of the fuel injector. If the circuit tests normal, replace the ECM.
scientia non olet · About LEMON Manuals