Component Testing

WARNING: This page is about a different variant/trim than selected.

Reductant Tank Heater

Ignition OFF, disconnect the harness connector at the A38 Reductant Pump and Sensor Assembly.
Test for 1 - 3 Ω between terminals 9 and 11 of the A38 Reductant Pump and Sensor Assembly.
- If not within 1 - 3 Ω
  Replace the A38 Reductant Pump and Sensor Assembly.
- Go to next step: If within 1 - 3 Ω
Test for infinite resistance between each terminal and the A38 Reductant Pump and Sensor Assembly housing/case.
- terminal 9
- terminal 11
- If less than infinite resistance
  Replace the A38 Reductant Pump and Sensor Assembly.
- Go to next step: If infinite resistance
All OK.

Reductant Line Heater

Ignition OFF, disconnect the harness connector at the E52 Reductant Line Heater.
Test for 1 - 4 Ω between terminals 1 and 2 of the Reductant Line Heater.
- If not within 1 - 4 Ω
  Replace the E52 Reductant Line Heater.
- Go to next step: If within 1 - 4 Ω
Test for infinite resistance between each terminal and the E52 Reductant Line Heater housing/case.
- terminal 1
- terminal 2
- If less than infinite resistance
  Replace the E52 Reductant Line Heater.
- Go to next step: If infinite resistance
All OK.