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Home >> Pontiac >> 2009 >> G3 Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 89 (Engine Controls And Fuel - 1.6L (LDE, LLU, And LXV) Or 1.8L (2H0) - Troubleshooting And Diagnosis) >> Electronic Ignition System Diagnosis >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2010 Chevrolet Aveo. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE: Do not perform this diagnostic procedure unless you were sent here from a misfire DTC or the Engine Cranks but Does Not Run diagnostic.
  1. Ignition OFF for 1 minute, disconnect the harness connector at the ignition coil.
  2. Test for less than 5 Ω between the ground circuit terminal B and ground.
    • If greater than the specified range, repair the ground circuit for an open/high resistance.
  3. Test for less than 5 Ω between the low reference circuit terminal C and ground.
    • If greater than the specified range, test the circuit for an open/high resistance. If the circuit tests normal, replace the ECM.
  4. Test for less than 2 Ω between the ignition voltage circuit terminal A and the fuse.
    • If greater than the specified range, repair the ignition voltage circuit for high resistance.
  5. 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.
  6. If all circuits test normal, test or replace the ignition coil assembly.
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