Cab Sensor Circuits
NOTE:
For connector terminal identification, see CONNECTOR IDENTIFICATION. For wiring diagram, see wiring diagram.
- Inspect each Wheel Speed Sensor (WSS) for corrosion or water contamination, and repair as necessary. Perform TEST VER-1A. If WSS connectors are okay, go to next step.
- Turn ignition off. Disconnect Controller Anti-Lock Brake (CAB) 60-pin connector. Inspect, clean and repair connector as necessary. Perform TEST VER-1A. If connector is okay, turn ignition on. Using scan tool in voltmeter mode, check voltage on CAB connector terminals No. 1, 2, 3, 4, 6, 7, 8 and 9. See Figure. If reading is more than one volt on any circuit, repair short to power in appropriate wire. Perform TEST VER-1A. If reading is less than one volt on all circuits, go to TEST 20A.