Circuit/System Verification
WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
- Verify DTC P0563 is set as current.
- If the DTC is history, refer to Charging System Test .
- Engine running, record the voltage at the battery terminals. Observe the scan tool ECM Ignition 1 Signal parameter. Voltages should not differ by more than 2 volts.
- If greater than specified value, replace the ECM.