Traction Control: Anti-Lock: Servicing

NOTE: The ABS is considered maintenance-free, but when working on ABS equipped vehicles, the following precautions must be observed:

NEVER connect or disconnect wiring harness plug of EBCU with ignition switched on.
The EBCU MUST be unplugged when welding with an electric welding unit.
During painting procedures, the EBCU may be subjected to a maximum of 203°F (95°C) for brief periods and a maximum of 185°F (85°C) for periods up to 2 hours.
DO NOT use a fast charger to start the engine. Disconnect battery from vehicle electrical system when fast charging.
NEVER disconnect battery from vehicle electrical system with engine running. Ensure that all connectors of wiring harness are securely connected.
The entire ABS system MUST be checked with the ABS Diagnostic Tester (J-35890) after replacing modulator valve, EBCU, wheel sensors or wiring harness. Ensure all brake lines are properly routed.
NOTE: If brake lines are reversed (inlet vs. outlet), it can be detected in one of two ways: Using ABS diagnostic tester, or by doing an anti-lock stop.
For safety reasons, modulator valve MUST NOT be repaired. The unit must be replaced.
DO NOT loosen any screws on modulator valve other than brake line connections. The modulator will no longer seal properly after loosening.
When replacing modulator valve, it MUST be removed through access in rear storage compartment. Avoid damage to interior/exterior from brake fluid spillage.
DO NOT attempt removing bottom of rear storage compartment to replace modulator valve. Be sure to clean rear storage compartment after replacing modulator valve.
DO NOT support suspension components by wheel speed sensor wires.
The wheel speed sensors are a tight fit into knuckle and should be pushed in by hand. Do not hammer sensors into position.
The cylindrical surface and mounting plate of the speed sensor should be thoroughly coated with Anti-Corrosion Sealer (Part No. 12345106) where it contacts the aluminum knuckle. The sensor must be clean of corrosion and dry before applying sealer. DO NOT use chassis grease as a sealer.
The wheel speed sensors must be installed in their respective locations. Each is identified with a white tag, located 20 mm from sensor neck, labeled L (left) and R (right).
Remove tire and wheel assemblies when replacing sensors.
Always note routing, position, mounting and locations of all components when performing ABS system service. Proper operation is possible only when system is restored to original condition.