Circuit/System Verification
- Verify DTC P0563 is set as current.
- If the DTC is history, refer to Charging System Test (Solstice) or Charging System Test (SKY) .
- 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.