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Home >> Pontiac >> 2009 >> Vibe Base, 1.8 8, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 1.8L (Lay) - DTC P0010 To DTC P0420 >> DTC P0351-P0354 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the ignition coil.
  2. Ignition OFF, test for less than 10 ohms of resistance between the coil ground circuit terminal 4 and ground G104.
    • If greater than the specified range, test the coil ground circuit for an open/high resistance.
  3. Ignition ON, verify that a test lamp illuminates between the ignition 1 voltage circuit terminal 1 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. If the circuit tests normal and the ignition 1 voltage circuit fuse is open, test all components connected to the ignition 1 voltage circuit and replace as necessary.
    4. IMPORTANT: Ensure that DTCs are cleared before performing this test.
  4. Engine cranking, test for 0.2-1.0 volts between the ignition coil control circuit terminal 3 and ground.
    • If less than the specified range, test the control circuit for short to ground or an open/high resistance. If the circuit tests normal, replace the PCM.
    • If greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the PCM.
  5. Test for 4.8-5.2 volts between the ignition fail-safe circuit terminal 2 and ground.
    • If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the PCM.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the PCM.
  6. If all circuits test normal, test or replace the ignition coil.
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