Circuit/System Testing

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

Ignition Off and all vehicle systems Off. It may take up to 2 min for all vehicle systems to power down.
Disconnect the harness connector at the A38 Reductant Pump and Sensor Assembly.
Test for less than 10 Ω between the low reference circuit terminal 15 and ground.
- If 10 Ω or greater
1. Ignition Off.
2. Disconnect the X2 harness connector at the K115 Reductant Control Module.
3. Test for less than 2 Ω between A38 Reductant Pump and Sensor Assembly harness connector terminal 15 and K115 Reductant Control Module harness connector terminal 5.
  - If 2 Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2 Ω, replace the K115 Reductant Control Module.
- Go to next step: If less than 10 Ω
Disconnect the X2 harness connector at the K115 Reductant Control Module.
Test for less than 2 Ω between the control terminals listed below
- A38 Reductant Pump and Sensor Assembly harness connector terminal 16 and K115 Reductant Control Module harness connector terminal 1
- A38 Reductant Pump and Sensor Assembly harness connector terminal 8 and K115 Reductant Control Module harness connector terminal 2
- A38 Reductant Pump and Sensor Assembly harness connector terminal 7 and K115 Reductant Control Module harness connector terminal 3
- If greater than 2 Ω
  Repair the open/high resistance in the circuit.
- Go to next step: If less than 2 Ω
Test for infinite resistance between each control circuits listed above and ground.
- If less than infinite resistance
  Repair the short to ground in the circuit.
- Go to next step: If infinite resistance
Ignition On, test for less than 1 V between each control circuits listed above and ground.
- If 1 V or greater
  Repair the short to voltage on the circuit.
- Go to next step: If less than 1 V
Replace the A38 Reductant Pump and Sensor Assembly.