Isuzu Cars and Trucks 1981-1991

Service Precautions


Do not use rubber hoses or other parts not specifically specified for the RWAL system. When using repair kits, replace all parts included in the kit. Partial or incorrect repair may lead to functional problems.
Lubricate rubber parts with clean, fresh brake fluid to ease assembly. Do not use lubricated shop air to clean parts; damage to rubber components may result.
Use only brake fluid from an unopened container. Use of suspect or contaminated brake fluid can reduce system performance and/or durability.
A clean repair area is essential. Perform repairs after components have been thoroughly cleaned; use only denatured alcohol to clean components. Do not allow components to come into contact with any substance containing mineral oil; this includes used shop rags.
The RWAL ECU is a microprocessor similar to other computer units in the vehicle. Insure that the ignition switch is OFF before removing or installing controller harnesses. Avoid static electricity discharge at or near the controller.
Never disconnect any electrical connection with the ignition switch ON unless instructed to do so in a test.
Avoid touching module connector pins.
Leave new components and modules in the shipping package until ready to install them.
To avoid static discharge, always touch a vehicle ground after sliding across a vehicle seat or walking across carpeted or vinyl floors.
Never allow welding cables to lie on, near or across any vehicle electrical wiring.
Do not allow extension cords for power tools or droplights to lie on, near or across any vehicle electrical wiring.
If welding is to be performed on the vehicle using an electric arc welder, the EBCM and valve block connectors should be disconnected.
Hydraulic units of the Anti-Lock Brake System are not separately serviceable and must be replaced as assemblies. DO NOT disassemble any component which is designated as non-serviceable.