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. MIL
2. 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