Circuit/System Testing

Ignition ON.
Verify that DTC C056D or C056E is not set.
- If either DTC is set
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- If none of the DTCs are not set
Verify that DTC C0710 42 is not set.
- If the DTC is set
  Refer to Steering Angle Sensor Centering .
- If the DTC is not set
Verify the B99 steering wheel angle sensor is installed correctly.
- If loose or incorrect installation
  Correct the installation or replace the component.
- If correct installation
Ignition OFF and all vehicle systems OFF with the scan tool disconnected, disconnect the harness connector at the B99 steering wheel angle sensor. It may take up to 2 minutes 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 a test lamp illuminates between the ignition 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 ignition circuit and ground.
  - If less than infinite resistance, repair the short to ground on the circuit.
  - If infinite resistance
3. Test tor less than 2 Ω in the ignition 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.
Ignition ON.
Verify that DTC C0710 is not set.
- If the DTC is set
  Refer to Steering Angle Sensor Centering .
- If the DTC is not set
Verify the DTC does not set while operating the vehicle.
- If the DTC sets
  Replace the K17 electronic brake control module.
- If the DTC does not set
All OK.