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Home >> Chevrolet >> 2012 >> Cruze Eco, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Engine Controls/Fuel - 1.8L - DTC Diagnostics, Troubleshooting & Diagnosis) >> Diagnostic Information and Procedures >> Electronic Ignition System Diagnosis >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
    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, disconnect the T8 Ignition Coil electrical connector.
  2. Ignition OFF, all vehicles system OFF. It may take up to 2 minutes for all vehicle systems to power down. 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 K20 Engine Control Module.
  3. 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.
  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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