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Circuit/System Testing

WARNING: This page is about a different car, the 2012 Chevrolet Volt. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the B+ harness connector X4 at the K1 14V power module.
  2. Connect a test lamp between 12-volt battery positive and the K1 14V power module connector X4 at the module.
  3. Vehicle ON, observe the Low-Voltage Circuit Voltage parameter in the 14V Power Module data list. The parameter should be within 0.5 volt of the actual 12-volt battery voltage.
    • If the voltage is not within the specified range, replace the K1 14V power module.
  4. Vehicle OFF, remove the positive connection at the 12-volt battery.
  5. Measure the resistance between the X4 connector and the battery positive connection.
    • If the resistance is greater than 1.0 ohm, repair the high resistance condition in the 12-volt circuit.
  6. Replace the K1 14V power module.
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