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.
Disconnect ABS ECU pump motor connector. Using fused jumper wire, connect positive (+) lead to terminal M+ and negative lead to terminal M- of ABS pump motor connector, and check that pump motor operates. See Fig 1. If pump motor operates, check for open circuit in wiring harness between pump motor and ABS ECU. Repair as necessary. If pump motor does not operate, replace ABS actuator. See ABS ECU/ACTUATOR under REMOVAL & INSTALLATION.