Circuit/System Testing
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 that DTC P0562 is set as current.
- If the DTC is history refer to Charging System Test
- Engine running, measure the voltage at the battery terminals and compare it with the Ignition 1 Signal parameter. The battery and Ignition 1 signal readings do not differ more than 2 volts.
- If greater than the specified value, test the Ignition 1 circuits and ground circuits for an open/high resistance.
- Ignition 1 signal 3.6L X2 terminals 3-5-6-54.
- Ground circuits 3.6L X2 terminals 1- 2 and 4.
- If greater than the specified value, test the Ignition 1 circuits and ground circuits for an open/high resistance.
- If the circuits test normal, replace the ECM.