Circuit/System Verification
- Verify that DTC P0563 is set as current.
- Engine running measure and record the voltage at the battery terminals. Verify that the battery voltage is 12.6-15.5 volts.
- If the battery voltage is not within the specified range, refer to Charging System Test
- Engine running, observe the scan tool ECM Battery Voltage parameter.
- Verify the battery and Ignition 1 signal readings do not differ more than 2.0 volts.
- If greater than specified value, replace the ECM.