Circuit/System Verification
- Engine running, accessories OFF, measure and record the battery voltage at the battery terminals. The voltage should be between 12.6 and 15.0 V.
- If not within the specified range, refer to Charging System Test (Acadia or Enclave) or Charging System Test (OUTLOOK) .
- Observe the scan tool Ignition 1 Signal parameter. The reading should be between 12.6 and 15.0 V.
- If greater than the specified range, replace the FPCM.