Circuit/System Testing

Ignition ON.
Verify that DTC U0073, U0074, U0125 or U0126 is not set.
- If DTC U0073, U0074, U0125 or U0126 is set
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Go to next step: If DTC U0073, U0074, U0125 or U0126 is not set
Verify that DTC C0710 4B or C0710 5A is not set.
- If DTC C0710 4B or C0710 5A is set
  Refer to Steering Wheel Angle Sensor Centering .
- Go to next step: If DTC C0710 4B or C0710 5A 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.
- Go to next step: If correct installation
Ignition OFF and 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 5 Ω between the ground circuit terminal 6 and ground.
- If 5 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.
- Go to next step: If less than 5 Ω
Ignition ON.
Verify 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 12 V reference circuit and ground.
  - If less than infinite resistance, repair the short to ground on the circuit.
  - Go to next step: 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.
- Go to next step: If the test lamp illuminates
Replace the B99 Steering Wheel Angle Sensor.