Circuit/System Testing

WARNING: This page is about a different car, the 2008 Saturn Sky and 2008 Pontiac Solstice. 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 (Solstice) or Charging System Test (SKY)
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 2.0L X2 terminals 3 - 5 -6 and 54.
  - Ignition 1 signal 2.4L X1 terminal 19 - 20 and X2 terminal 13.
  - Ground circuits 2.0L X2 terminals 1- 2 and 4.
  - Ground circuits 2.4L X2 terminal 73.
If the circuits test normal, replace the ECM.