Diagnostic Procedure
WARNING: This page is about a different car, the 2003 Toyota Tundra, 2002 Toyota Tundra, and 2001 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.
- If ABS warning light does not light up, check and replace ABS ECU. See ABS ECU/ACTUATOR under REMOVAL & INSTALLATION. If ABS warning light remains ON, check warning light and combination meter/ABS warning light. If either are found to be faulty, replace bulb and/or combination meter. If both are in working order, check for open wiring harness/connector between GAUGE fuse and ABS ECU.
- Check for DTCs. See RETRIEVING DIAGNOSTIC TROUBLE CODES under SELF-DIAGNOSTIC SYSTEM. If DTC is output, repair indicated circuit. If no DTC is output, check for short circuit in wiring harness/connector between GAUGE fuse and ABS ECU. IF short is found, repair and/or replace wiring harness or connector. If wiring harness proves to be OK, replace ABS ECU. See ABS ECU/ACTUATOR under REMOVAL & INSTALLATION.