Circuit/System Testing

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.

Inspect the appropriate B5 Wheel Speed Sensor and encoder ring for contamination, metallic particles, physical damage, incorrect installation and the correct component.
- If contamination, physical damage, incorrect installation, or the wrong component is diagnosed
  Repair or replace the applicable component.
- If no contamination, physical damage, incorrect installation, or the wrong component is not diagnosed
Ignition OFF and all vehicle systems OFF, disconnect the harness connectors at the appropriate B5 Wheel Speed Sensor and the harness connector at the K17 Electronic Brake Control Module, ignition ON.
Test for less than 1 V between the K17 Electronic Brake Control Module harness connector terminals listed below and ground:
- B5LF Wheel Speed Sensor - Left Front - terminal 37 and terminal 36
- B5LR Wheel Speed Sensor - Left Rear - terminal 30 and terminal 29
- B5RF Wheel Speed Sensor - Right Front - terminal 26 and terminal 27
- B5RR Wheel Speed Sensor - Right Rear - terminal 33 and terminal 34
- If 1 V or greater
  Repair the short to voltage on the circuit.
- If less than 1 V
Ignition OFF.
Test for infinite resistance between the K17 Electronic Brake Control Module harness connector terminals listed below and ground:
- B5LF Wheel Speed Sensor - Left Front - terminal 37 and terminal 36
- B5LR Wheel Speed Sensor - Left Rear - terminal 30 and terminal 29
- B5RF Wheel Speed Sensor - Right Front - terminal 26 and terminal 27
- B5RR Wheel Speed Sensor - Right Rear - terminal 33 and terminal 34
- If less than infinite resistance
  Repair the short to ground on the circuit.
- If infinite resistance
Test for less than 2 Ω between the B5 Wheel Speed Sensor harness connector terminal 1 and the K17 Electronic Brake Control Module harness connector terminal listed below:
- B5LF Wheel Speed Sensor - Left Front - terminal 36
- B5LR Wheel Speed Sensor - Left Rear - terminal 29
- B5RF Wheel Speed Sensor - Right Front - terminal 27
- B5RR Wheel Speed Sensor - Right Rear - terminal 34
- If 2 Ω or greater
  Repair the open/high resistance in the circuit.
- If less than 2 Ω
Test for less than 2 Ω between the B5 Wheel Speed Sensor harness connector terminal 2 and the K17 Electronic Brake Control Module harness connector terminal listed below:
- B5LF Wheel Speed Sensor - Left Front - terminal 37
- B5LR Wheel Speed Sensor - Left Rear - terminal 30
- B5RF Wheel Speed Sensor - Right Front - terminal 26
- B5RR Wheel Speed Sensor - Right Rear - terminal 33
- If 2 Ω or greater
  Repair the open/high resistance in the circuit.
- If less than 2 Ω
Replace the B5 Wheel Speed Sensor.
Verify the DTC does not set while operating the vehicle within Conditions for Running the DTC.
- If the DTC sets
  Replace the K17 Electronic Brake Control Module.
- If the DTC does not set
All OK.