CAT 3406E (Prefix 5DS or 1LW) Fault Code: 21 PID: 232 SPN: FMI: 3 5 Volt Supply voltage high
The Engine Control Module (ECM) detects the following conditions:
The 5 volt supply is greater than 5.16 VDC for more than one second.
The ECM has been powered for at least three seconds.
Sensors that are regulated with 5V: Boot pressure, atmosphere pressure, engine oil pressure, coolant temperature, intake manifold air temperature, fuel temperature
Probable Causes:
1) ECM Connection/Harness
2) Sensor Failure
3) Sensor wiring failure
4) ECM Failure
CAT 3406E (Prefix 5DS or 1LW) Fault Code: 21 PID: 41 SPN: FMI: 4 8 Volt Supply voltage low
CAT 3406E (Prefix 5DS or 1LW) Fault Code: 21 PID: 41 SPN: FMI: 3 8 Volt Supply voltage high
CAT 3406E (Prefix 5DS or 1LW) Fault Code: 14 PID: 122 SPN: FMI: 6 Med/High Retarder current high
CAT 3406E (Prefix 5DS or 1LW) Fault Code: 14 PID: 122 SPN: FMI: 5 Med/High Retarder current low
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