The Engine Control Module (ECM) detects the following conditions:
•The ECM detects a low current condition (open circuit) for one second while the ECM is attempting to energize the solenoid for cylinders 3 and 4.
•The engine retarder switch is in the low or high position.
Probable Causes:
1) ECM Connection/Harness
2) Harness between the ECM and valve cover base
3) Engine retarder solenoid failure
4) Harness under valve cover
5) ECM Failure
6) Harness at bulkhead connector
CAT 3406E (Prefix 1MM or 2WS) Fault Code: 14 PID: SPN: 121 FMI: 5 Low/High Retarder current low
CAT 3406E (Prefix 1MM or 2WS) Fault Code: 13 PID: SPN: 174 FMI: 4 Fuel Temperature voltage low
CAT 3406E (Prefix 1MM or 2WS) Fault Code: 13 PID: SPN: 174 FMI: 3 Fuel Temperature voltage high
CAT 3406E (Prefix 1MM or 2WS) Fault Code: 12 PID: SPN: 111 FMI: 4 Coolant Level voltage low
CAT 3406E (Prefix 1MM or 2WS) Fault Code: 12 PID: SPN: 111 FMI: 3 Coolant Level voltage high
CAT 3406E (Prefix 1MM or 2WS) Fault Code: 12 PID: SPN: 111 FMI: 2 Coolant Level signal invalid
