Antilock Brakes / Traction Control Systems: Service Precautions

Observe the following general precautions during any Anti-Lock Brake System/Traction Control System ABS/TCS service. Failure to adhere to these precautions may result in ABS/TCS system damage.
- Unplug the Electronic Brakes and Traction Control Module (EBTCM) harness connector before performing electric welding procedures.
- Carefully note the routing of the ABS/TCS wiring and wiring components during removal. The ABS/TCS components are extremely sensitive to EMI (electromagnetic interference). Proper mounting is critical during component service.
- Do not use a quick charger for engine starting or for battery charging with the battery still connected. Brake failure or ABS/TCS component damage may result.
- Disconnect the battery with the ignition off.
- Disconnect the EBTCM connector with the ignition off.
- Do not attempt to repair the Brake Pressure Modulator Valve (BPMV) or any other non serviceable ABS/TCS components where noted. Many ABS/TCS components are serviceable by component replacement only.
- Do not hang the suspension components from the Wheel Speed Sensor (WSS) cables. The cables may be damaged.
- Do not subject the EBTCM to temperatures of more than 85°C (184°F).
- Do not use petroleum based fluids in the master cylinder. Do not use any containers previously used for petroleum based fluids. Petroleum causes swelling and distortion of the rubber components in the hydraulic brake system, resulting in water entering the system and lowering the fluid boiling point.
- Inspect the ABS/TCS system after service using a scan tool.

BATTERY DISCONNECT CAUTION
Caution: Before servicing any electrical component, the ignition key must be in the OFF or LOCK position and all electrical loads must be OFF, unless instructed otherwise in these procedures. If a tool or equipment could easily come in contact with a live exposed electrical terminal, also disconnect the negative battery cable. Failure to follow these precautions may cause personal injury and/or damage to the vehicle or its components.

FASTENER NOTICE
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.