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Circuit/System Verification

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 ignition control (IC) Circuit Status parameters with the scan tool. All of the parameters should display OK.
    • If the parameters display anything other than OK, continue with Circuit/System Testing.
  2. With the engine running, observe the Misfire Current counters using the scan tool. The counters should not be incrementing.
    • If the counters are incrementing for a pair of companion cylinders, continue with Circuit/System Testing.
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