Test 29A - Wheel Speed Sensor Speed Comparison
Perform TEST 1A Before Proceeding Test 1A - Checking For Diagnostic Trouble Codes1. If any other Wheel Speed Sensor diagnostic trouble codes are present, repair them before proceeding with this test.
2. Have an assistant drive the vehicle while you monitor all wheel speed sensor signals with the DRB.
3. Drive the vehicle straight ahead, accelerating slowly to a maximum speed of 15 MPH.
4. Look for any signal(s) that read behind the others by more than 3 MPH. Refer to the trouble code list above and perform the indicated test.