The Engine Control Module (ECM) detects the following conditions:
•The 8 volt supply is less than 7.5 VDC for more than one second.
•The ECM has been powered for more than three seconds.
Probable Causes:
1) ECM Connection/Harness
2) Accelerator Position Sensor
3) Accelerator Position Sensor Harness
4) ECM Failure
CAT 3406E (Prefix 1MM or 2WS) Fault Code: 21 PID: SPN: 41 FMI: 3 8 Volt Supply voltage high
CAT 3406E (Prefix 1MM or 2WS) Fault Code: 16 PID: SPN: 173 FMI: 11 Very High Exhaust Gas Temperature Derate
CAT 3406E (Prefix 1MM or 2WS) Fault Code: 16 PID: SPN: 173 FMI: 0 High Exhaust Gas Temperature Derate
CAT 3406E (Prefix 1MM or 2WS) Fault Code: 14 PID: SPN: 122 FMI: 6 Med/High Retarder current high
CAT 3406E (Prefix 1MM or 2WS) Fault Code: 14 PID: SPN: 122 FMI: 5 Med/High Retarder current low
CAT 3406E (Prefix 1MM or 2WS) Fault Code: 14 PID: SPN: 121 FMI: 6 Low/High Retarder current high
