Antilock Brakes / Traction Control Systems: Description and Operation: Service Precautions

When working on this system, observe the following precautions:
- Before welding on the vehicle with an electric welding unit, complete the following steps:
- Turn the ignition switch OFF.
- Disconnect the EBCM connectors.
- Do not use a fast charger for starting the engine.

CAUTION: Refer to Battery Disconnect Caution in Service Precautions.

- Disconnect the negative battery cable when fast charging.
- Never disconnect the battery from the vehicle electrical system while the engine is running.
- Connect all wiring harness connectors securely.
- Proper speed sensor wiring, routing and retaining are necessary in order to prevent false signals due to electrical noise. You can achieve proper system operation only by restoring the system to its original condition.
When servicing the ABS, note the routing, position, mounting and locations of the following items:
- All components
- The wiring
- The connectors
- The clips
- The brackets
- The brake pipes

Follow the above mentioned precautions when working on ABS. Familiarize yourself with ABS and its relationships with other components on the vehicle.