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Home >> Buick >> 2009 >> Allure Super >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 5.3L - DTC P0016 To DTC P0358 >> DTC P0351-P0358 >> Circuit/System Testing
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Circuit/System Testing

  1. With the engine running, monitor the Cylinder 1-8 IC Circuit Status parameters with a scan tool.
    • If a short to GND or Open status test displays FAULT, test for an open/high resistance or short to ground on the affected IC circuit.
    • If a short to volts status test displays FAULT, test for a short to voltage on the affected IC circuit.
    2. IMPORTANT: A high resistance on any IC circuit can cause a misfire condition before DTCs P0351-P0358 set.
  2. Exchange the affected ignition coil/module, with the ignition coil/module of a cylinder that is not affected.
  3. Start and run the engine. With a scan tool, monitor the IC circuit parameters and the Misfire Current counters.
    • If the circuit status fault identified or the misfire transfers with the ignition coil/module, replace the ignition coil/module assembly.
    • If the circuit status fault identified or the misfire does not transfer with the ignition coil/module, replace the ECM.
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