Diesel exhaust fluid (def) line heaters are internal of the def lines.
The heater electrical connectors are located near the def line couplings.
Webi have a code for heater line 1 open circuit.
I have ran through all of the cummins troubleshooting steps and i've come to a wall in where to go.
My voltage across the.
Webthis diagnostic is typically line heater 3 open circuit.
Check for multiple codes.
If spn 4356/fmi 5 and spn 4354/fmi 5 are present, repair open between pin 9 of the.
Webjan 4, 2022 · ohm test and load test the wiring from the ecm to the def dosing unit.
You most certainly have a rubbed or corroded wire or bad connection somewhere between.