Circuit/System Testing

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 terminal 5 and X2 terminal 54
  - Ignition 1 signal 4.4L / 4.6L X1 terminal 19 and X2 terminals 13 and 28
  - Ground circuits 3.6L X2 terminals 1, 2 and 4
  - Ground circuits 4.4L / 4.6L X2 terminal 73 and X3 terminal 73
If the circuits test nor mal, replace the ECM.