Diagnostic Aids

With the ignition ON and the engine OFF, voltage measured with a DVOM on circuit No. 225 at the generator with the ring terminal disconnected should read battery voltage. With the ring terminal connected, voltage should be between 1.0-1.6 volts.

An intermittent short to ground on circuit No. 225 will set this DTC. To locate an intermittent problem, use the scan tool to monitor BATTERY voltage. Wiggling the wires with engine running may locate the area where a short to ground on circuit No. 225 exists. If this occurs, the generator will stop charging.

A generator that is not charging, with the engine running due to an internal fault or loose accessory drive belt will pull circuit No. 225, through resistance, to ground and set this DTC.