Freightliner Def Line Heater Location - Poursteady Utilities

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.

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My voltage across the.

Webthis diagnostic is typically line heater 3 open circuit.

Check for multiple codes.

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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.

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You most certainly have a rubbed or corroded wire or bad connection somewhere between.