Inspection Procedure

WARNING: This page is about a different car, the 2002 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.

Check ECU-IG fuse.
Preparation:

Remove ECU-IG fuse from Instrument Panel J/B.

Fig 1: Locating ECU-IG Fuse
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

CHECK:

Check continuity of ECU-IG fuse.

OK:

Continuity
1. NG: Check for short in circuit all the harness and components connected to ECU-IG fuse (See Figure ).
2. OK: Go to next step.
Check battery positive voltage.
OK:

Voltage: 10 - 14 V
1. NG: Check and repair the charging system. See CHARGING .
2. OK: Go to next step.
Check voltage between terminals IGI and GND of ABS actuator connector.
Preparation:

Disconnect ABS actuator connector.

CHECK:
1. Turn the ignition switch ON.
2. Measure voltage between terminals IG1 (3) - GND (1, 23) of ABS actuator harness side connector.
  
  Fig 2: Locating ABS ECU Terminals 1, 2, & 23
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
OK:

Voltage: 10 - 14 V .
1. OK: Check or replace ABS actuator assembly.
2. NG: Go to next step.
Check continuity between terminals GND of ABS actuator connector and body ground.
CHECK:

Measure resistance between terminal GND (1, 23) of ABS actuator harness side connector and body ground.

OK:

Resistance: 1 Ω or less .

Fig 3: Locating ABS ECU Terminals 1 & 23
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: Repair or replace harness or connector.
2. OK: Go to next step.
Check for open circuit in harness and connector between ABS actuator and ECU-IG fuse. See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE .