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Circuit/System Testing

WARNING: This page is about a different car, the 2010 Saturn Sky and 2010 Pontiac Solstice. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connectors at the ECM.
  2. Ignition OFF and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 5 Ω between the ground circuit terminals listed below and ground.
    • 2.0L Terminal 1 X2
    • 2.0L Terminal 2 X2
    • 2.0L Terminal 4 X2
    • 2.4L Terminal 73 X2
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify that a test lamp illuminates between the B+ / ignition circuit terminals listed below and ground.
    • 2.0L IGN Terminal 3 X2
    • 2.0L IGN Terminal 5 X2
    • 2.0L IGN Terminal 6 X2
    • 2.0L IGN Terminal 41 X2
    • 2.0L IGN Terminal 54 X2
    • 2.0L B+ Terminal 56 X2
    • 2.4L IGN Terminal 3 X1
    • 2.4L IGN Terminal 73 X1
    • 2.4L IGN Terminal 19 X1
    • 2.4L B+ Terminal 20 X1
    • If the test lamp did not illuminate, test the B+ / Ignition circuits for a short to ground or an open/high resistance.
  4. If all the circuits test normal, replace the ECM.
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