Circuit/System Testing

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

Inspect the wire harness on the reductant temperature sensor for damage.
- If damage is found
  Replace the reductant temperature sensor.
- If no damage is found
Ignition Off and all vehicle systems Off, disconnect the harness connector at the reductant temperature sensor side of the B212 Reductant Sensor Module. It may take up to 2 minutes for all vehicle systems to power down.
Verify the resistance of the reductant temperature sensor between the harness connector circuit terminal 2 and circuit terminal 3 is within the range specified in the Temperature Versus Resistance (EGT Sensors) , Temperature Versus Resistance (EGR Temperature Sensors) , Temperature Versus Resistance (Reductant Injector) , Temperature Versus Resistance (Reductant Tank Temperature Sensor) and Temperature Versus Resistance (Engine Coolant Temperature Sensor) table.
NOTE: The reductant tank level must be at least 33% full and the reductant temperature must be greater than -5°C (23°F) to ensure accurate resistance readings.
- If not within the specified range
  Replace the reductant temperature sensor.
- If within the specified range
Replace the B212 Reductant Sensor Module.