Circuit/System Testing

WARNING: This page is about a different car, the 2015 Chevrolet Trax and 2015 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.

Ignition OFF all vehicle systems OFF, disconnect the harness connector at the B99 Steering Wheel Angle Sensor. It may take up to 2 min for all vehicle systems to power down.
Test for less than 10 Ω between the ground circuit terminal 6 and ground.
- If 10 Ω or greater
1. Ignition OFF
2. Test for less than 2 Ω in the ground circuit end to end.
  - If 2 Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2 Ω, repair the open/high resistance in the ground connection.
- If less than 10 Ω
Ignition ON.
Verify that a test lamp illuminates between the 12 V reference circuit terminal 5 and ground.
- If the test lamp does not illuminate
1. Ignition OFF, disconnect the harness connector at the K17 Electronic Brake Control Module
2. Test for infinite resistance between the 12 V reference circuit and ground.
  - If less than infinite resistance, repair the short to ground on the circuit.
  - If infinite resistance
3. Test for less than 2 Ω in the 12 V reference circuit end to end.
  - If 2 Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2 Ω, replace the K17 Electronic Brake Control Module.
- If the test lamp illuminates
Replace the B99 Steering Wheel Angle Sensor.
Verify the DTC does not set while operating the vehicle within the Conditions for Running the DTC.
- If the DTC sets
  Replace the K17 Electronic Brake Control Module.
- If the DTC does not set
All OK.