Circuit/System Verification
- Measure and record the voltage at the battery terminals with the engine OFF, and again with the engine running. Verify that the battery voltage is 11-16 volts with the engine OFF and with the engine running.
- If the battery voltage is not within the specified range, refer to Charging System Test .
- Observe the scan tool Battery Voltage parameter in the EBCM data list. Verify that the scan tool displays a value that is within 2 volts of the battery voltage recorded in step 1.
- If the scan tool parameter is not within the specified range, refer to Circuit/System Testing .
- Refer to Diagnostic Aids .