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Circuit/System Testing

WARNING: This page is about a different car, the 2006 Chevrolet Monte Carlo and 2006 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the battery current sensor.
  2. Ignition OFF, verify a test lamp illuminates between B+ and the low reference circuit terminal B. If the test lamp did not illuminate, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the BCM.
  3. Ignition ON, test for 5 volts between the battery current sensor supply voltage circuit terminal A and ground. If less than the specified range, test the battery current sensor supply voltage circuit terminal A for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
  4. Test for 5 volts between the battery current sensor signal circuit terminal C and ground. If less than 5 volts, test the battery current sensor signal circuit terminal C for a short to ground or an open/high resistance. If the circuit test normal, replace the BCM.
  5. If all circuits test normal test or replace the battery current sensor.
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