LEMON Manuals: Even more car manuals for everyone
Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 228 (Engine Controls - 3.9L - DTC P0011 To P0420) >> DTC P0351, P0352 or P0353 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
  1. With the engine running, observe the Cylinder 1 and 4 IC Circuit Status, Cylinder 2 and 5 IC Circuit Status and the Cylinder 3 and 6 IC Circuit Status parameters with the scan tool.
    • If a parameter displays short Gnd/Open, test for an open/high resistance or a short to ground in the affected IC circuit. All wire circuit resistance should measure less than 2 ohms.
    • If a parameter displays short to B+, test for a short to voltage in the affected IC circuit.
  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 IC control circuit with a known good IC control circuit. Also exchange the spark plug wires of the corresponding coils.
  4. Start the engine.
  5. Observe the Misfire Current counters with the scan tool.
    • If the misfire transfers with the suspect IC control circuit, replace the ECM.
    • If the misfire remains with the coil, replace the ICM.
scientia non olet · About LEMON Manuals