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Circuit/System Testing

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
  1. With the ignition OFF, remove the fuel pump relay using the J 43244  .
  2. Crank the engine and test for a spark on each cylinder spark plug wire using the J 26792  . Ground the companion cylinder spark plug wire of each cylinder when it is tested.
    • If a bright blue spark is present on all 6 of the cylinders, remove and inspect all of the spark plugs for proper torque, proper gap, wear, damage, and fouling. Refer to Spark Plug Replacement andSpark Plug Inspection . Replace the spark plugs if necessary.
    • If there is no spark on any of the cylinders, test the ignition voltage circuit terminal F of the ICM for an open/high resistance or short to ground, or test the ground circuit of the ICM for an open/high resistance, or a faulty ICM. The wire circuit resistance should measure less than 3 ohms.
    • If spark is present on one or more of the cylinders, inspect and test the spark plug wires for arching, cuts, rubbing on other components, and proper resistance, refer to Spark Plug Wire Inspection or a faulty ICM.
    • If all tests are normal, then the system is operating correctly.
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