DESCRIPTION:Proportional valve bank 1 circuit failed high.
MONITORED PARAMETER:Proportional valve bank 1 circuit.
TYPICAL ENABLING CONDITIONS:Always Enabled
MONITOR SEQUENCE:Sequence None
EXECUTION FREQUENCY:Always Enabled
TYPICAL DURATION:Two second
DASH LAMPS:1. MIL2. CEL
ENGINE REACTION:None
VERIFICATION:Engine Idle (1 minute).
PROBABLE CAUSES:For 2010 EPA Engines:1. Short to power between pin 1 of the Jake brake solenoid and pin 66 of the MCM 120-pin connector.2. Short to power between pin 2 of the Jake brake solenoid and pin 91 of the MCM 120-pin connector.
For 2014 EPA Engines:1. DEF Dosing unit harness connector.2. Short to battery voltage between pin 4 of the harness side of the DEF dosing unit harness connector and pin 3 of the ECM 120-pin connector.3. Short between pin 3 of the harness side of the DEF dosing unit harness connector and pin 22 of the ECM 120-pin connector.