Circuit/System Testing

NOTE:

If any of the symptom codes 0F, 18 or 5A are set, refer to the Diagnostic Fault Information table for possible mechanical faults or conditions.

Ignition OFF, disconnect the harness connector at the appropriate B5 Wheel Speed Sensor, ignition ON.
Test for greater than 11V between the ignition circuit Terminal 1 and ground.
- If 11V or less
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 for less than 2Ω in the ignition circuit end to end.
  - If 2Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2Ω, replace the K17 Electronic Brake Control Module.
- If greater than 11V
Install a 3A fused jumper wire at the ignition circuit Terminal 1, ignition ON.
Verify the scan tool Wheel Speed Sensor parameter changes while rapidly tapping the fused jumper wire to the signal circuit Terminal 2.
- If the parameter does not change
1. Ignition OFF, disconnect the harness connector at the K17 Electronic Brake Control Module, ignition ON.
2. Test for less than 1V between the signal circuit and ground.
  - If 1V or greater, repair the short to voltage on the circuit.
  - If less than 1V
3. Ignition OFF.
4. Test for infinite resistance between the signal circuit and ground.
  - If less than infinite resistance, repair the short to ground on the circuit.
  - If infinite resistance
5. Test for less than 2Ω in the signal circuit end to end.
  - If 2Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2Ω, replace the K17 Electronic Brake Control Module.
- If the parameter changes
Replace the B5Wheel Speed Sensor.