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Circuit/System Testing

WARNING: This page is about a different car, the 2007 Cadillac XLR. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector of the adaptive cruise module (ACM).
  2. Ignition ON, test for greater than 9.2 volts between the ignition 1 voltage circuit terminal 14 and ground.
    • If less than the specified value, test the voltage circuit for an open/high resistance.
  3. Ignition ON, test for greater than 9.2 volts between the ignition 1 voltage circuit terminal 14 and the ground circuit terminal 12.
    • If less than the specified value, test the ground circuit for an open/high resistance.
  4. Engine ON, test for less than 16 volts between the ignition 1 voltage circuit terminal 14 and ground.
    • If greater than the specified value, test the voltage circuit for a short to voltage. If the circuit tests normal, refer to Charging System Test .
  5. If all circuits test normal, test or replace the ACM.
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