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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1640 (Engine Control System & Fuel System - 4.3L - DTC P0340 To DTC P2544) >> DTC P0351, P0352, or P0353 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2010 GMC Sierra and 2010 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. With the engine running, monitor the Ignition Coil Circuit Status parameters with a scan tool.
    • If a short to GND or open status 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 an ignition coil control circuit can cause a misfire condition, before DTC P0351-P0353 sets.
  2. Connect jumper wires from the harness connector of the ICM to the corresponding terminals of the ICM.
  3. Using the jumper wires, exchange the affected ignition coil control circuit with a known good ignition coil control circuit. Also exchange the spark plug wires of the corresponding coils.
  4. Start and run the engine. With a scan tool, monitor the ignition coil control circuit parameters and the misfire current counters.
    • If the circuit status fault identified or the misfire transfers with the suspect ignition coil control circuit, replace the ECM.
    • If the circuit status fault identified or the misfire does not transfer with the ignition coil/module, replace the ICM.
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