DESCRIPTION:High side digital output circuit shorted low.

MONITORED PARAMETER:High side digital output.

TYPICAL ENABLING CONDITIONS:Always on

MONITOR SEQUENCE:None

EXECUTION FREQUENCY:Continuous when enabling conditions met.

TYPICAL DURATION:Two seconds

DASH LAMPS:1. MIL2. CEL

ENGINE REACTION:None

VERIFICATION:Key cycle

NOTE: The supply voltage circuit is networked internal of the Aftertreatment Control Module (ACM). This circuit supplies voltage to the Coolant Valve, Purge-in-Process indicator (if equipped), and the Inlet NOx sensor. A short on any one of those circuits will set this fault code.

PROBABLE CAUSES:1. Coolant valve connector/harness.2. Failed ACM (Aftertreatment Control Module).