Circuit/System Testing
WARNING: This page is about a different car, the 2008 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
- Verify 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. Verify that battery terminal and Ignition 1 signal readings do not differ more than 2 volts.
- If greater than the specified value, test the Ignition 1 and ground circuits for open/high resistance.
- Ignition 1 signal 3.5L and 3.9L engine X1 terminal 19 and X1 terminal 47
- Ignition 1 signal 5.3L engine X1 terminal 19 and X2 terminal 13
- Ground circuit 3.5L and 3.9L engine X1 terminal 73
- Ground circuit 5.3L engine X2 terminal 73
- If greater than the specified value, test the Ignition 1 and ground circuits for open/high resistance.
- If the circuits test normal, replace the ECM.