Circuit/System Verification
- Ignition ON. Measure and record the voltage at the battery terminals. Verify that the battery voltage is 11-16 volts. Repeat with the engine running.
- If not within the specified range, go to Charging System Test .
- Observe the scan tool BCM Battery Voltage parameter. The scan tool data should not differ from the recorded battery voltage by more than 2 volts.
- If not within the specified range, go to Circuit/System Testing.
- Go to Diagnostic Aids.