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Home >> Buick >> 2007 >> Allure CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 68 (Engine Control System & Fuel System - 3.6L - DTC P0335 To DTC P2097) >> DTC P0351-P0356, P2300, P2301, P2303, P2304, P2306, P2307, P2309, P2310, P2312, P2313, P2315, or P2316 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the appropriate ignition coil.
  2. Test for less than 5 ohms between the ground circuit terminal 3 and ground.
    • If greater than the specified range, repair the open, or high resistance in the ground circuit.
  3. Test for less than 5 ohms between the ground circuit terminal 4 and ground.
    • If greater than the specified range, repair the open, or high resistance in the ground circuit.
  4. Ignition ON, load test for B+ between the ignition voltage circuit terminal 2 and ground.
    • If less than the specified range, test the ignition voltage circuit for a short to ground, or an open/high resistance. Replace the fuse if necessary.
  5. Connect a DMM, set on the DC Hz scale, between the IC circuit terminal 1 and ground.
  6. Engine cranking, or idling, test for 3-20 Hz between the IC circuit terminal 1 and ground.
    • If not within the specified range, test the IC circuit for a short to ground, short to voltage, or an open/high resistance. If the circuit/connection tests normal, replace the ECM.
  7. If all circuits/connections test normal, replace the ignition coil.
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