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Home >> Pontiac >> 2009 >> Vibe Base, 2.4 0, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 157 (Engine Controls And Fuel - 4.6L - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P0351-P0358 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2011 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the appropriate ignition coil.
  2. Test for less than 5 Ω between the ground circuit terminal D and ground.
    • If greater than the specified range, repair the ground circuit for an open/high resistance.
  3. Ignition OFF, all vehicle systems OFF, this may take up to 2 minutes. Test for less than 5 Ω between the low reference circuit terminal C and ground.
    • If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM.
  4. Ignition ON, verify that a test lamp illuminates between the ignition voltage circuit terminal A and ground.
    • If the test lamp does not illuminate, test the ignition voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition voltage circuit fuse is open, test all components connected to the ignition voltage circuit and replace as necessary.
  5. Connect a DMM between the ignition control circuit terminal B and ground.
  6. Engine running, test for 0.050-0.150 volts between the ignition control circuit and ground.
    • If less than the specified range, test the ignition 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 ignition control circuit for a short to voltage. If the circuit tests normal, replace the ECM.
  7. If all circuits test normal, test or replace the ignition coil.
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