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Home >> Pontiac >> 2008 >> Torrent GXP, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 146 (Engine Controls And Fuel - 3.6L - DTC P0008 To DTC P0333) >> DTC P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, or P0277 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2009 Pontiac Torrent and 2009 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the fuel injector multi-way harness connector X105.
    2. NOTE: Testing for steps 2 through 4 is performed on the ECM side of the multi-way harness connector.
  2. Ignition ON, connect a test lamp between the appropriate ignition voltage supply circuit terminal 1 or 2 and ground. Verify that the test lamp illuminates.
      NOTE: The ignition voltage circuits supply voltage to other components. Make sure you test all circuits for a short to ground or test all components for being shorted that share the ignition circuit.
    • If the test lamp does not illuminate, test the ignition circuits for a short to ground, or an open/high resistance. If the circuits test normal and the ignition circuit fuse is open, test or replace the appropriate fuel injector.
  3. Test for 2.6-4.6 V between the appropriate fuel injector control circuit listed below and ground.
    • Injector 1 terminal 3
    • Injector 2 terminal 6
    • Injector 3 terminal 4
    • Injector 4 terminal 7
    • Injector 5 terminal 5
    • Injector 6 terminal 8
    • If less than the specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.
    • If greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the ECM.
  4. Connect a test lamp between the appropriate fuel injector control circuit listed below and B+. Engine cranking, verify the test lamp flashes.
    • Injector 1 terminal 3
    • Injector 2 terminal 6
    • Injector 3 terminal 4
    • Injector 4 terminal 7
    • Injector 5 terminal 5
    • Injector 6 terminal 8
    • If the test lamp remains OFF, test the control circuit for a high resistance. If the circuit/connections test normal, replace the ECM.
    5. NOTE: Testing for steps 5 and 6 is performed on the fuel injector side of the multi-way harness connector. It may be necessary to remove the intake manifold to isolate the condition.
  5. Ignition OFF, measure the resistance between the appropriate fuel injector control circuit terminal listed below and ground. The DMM should display O.L.
    • Injector 1 terminal 3
    • Injector 2 terminal 6
    • Injector 3 terminal 4
    • Injector 4 terminal 7
    • Injector 5 terminal 5
    • Injector 6 terminal 8
    • If less than the specified value, test the fuel injector control circuit, or the appropriate ignition voltage circuit, for a short to ground. If the circuits/connections test normal, test or replace the appropriate fuel injector.
  6. Test for 12-16 Ω between the appropriate ignition voltage circuit terminal 1 or 2 and each fuel injector control circuit listed below.
    • Injector 1 terminal 3
    • Injector 2 terminal 6
    • Injector 3 terminal 4
    • Injector 4 terminal 7
    • Injector 5 terminal 5
    • Injector 6 terminal 8
    • If less than the specified range, test for a short between the control circuit and the ignition voltage circuit. If the circuits/connections test normal, test or replace the appropriate fuel injector.
    • If greater than the specified range, test the ignition voltage, and fuel injector control circuit, for an open/high resistance. If the circuits/connections test normal, test or replace the appropriate fuel injector.
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