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Home >> Buick >> 2008 >> Allure CXL >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Engine Control System & Fuel System - 3.6L - Troubleshooting & Diagnosis) >> Electronic Ignition (EI) System Diagnosis >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
    IMPORTANT: Do not perform this diagnostic procedure if you were not sent here from a misfire DTC or the Engine Cranks but Does Not Run diagnostic.
  1. Ignition OFF, disconnect the harness connector of the ignition coil.
  2. Ignition ON, load test for battery voltage between the ignition voltage circuit terminal 2 and ground.
    • If less than B+, test the ignition voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition circuit fuse is open, test all the components connected to the ignition voltage circuit and replace as necessary.
  3. Ignition OFF, test for less than 5 ohms of resistance between the ground circuit terminal 3 and ground.
    • If greater than the specified range, test for an open/high resistance in the ground circuit. If the circuit/connection tests normal, replace the ECM.
  4. Test for less than 5 ohms of resistance between the ground circuit terminal 4 and ground.
    • If greater than the specified range, repair the open, or high resistance in the ground circuit.
  5. If all circuits/connections test normal, replace the ignition coil.
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