Inspection Procedure

WARNING: This page is about a different car, the 2004 Lexus ES 330. However, it is still accessible from the selected car via links, so may be relevant.

CHECK SKID CONTROL ECU CONNECTOR SECURELY CONNECTED
1. NG: CONNECT CONNECTOR TO ECU
2. OK: Go to next step.
RECONFIRM DTC (See PRE-CHECK )

Fig 1: Normal & Malfunction Code Specifications Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. B: REPAIR CIRCUIT INDICATED BY OUTPUT CODE
2. A: Go to next step.
CHECK VOLTAGE OF ECU IG POWER SOURCE
1. Disconnect the skid control ECU connector.
2. Turn the ignition switch ON.
3. Measure the voltage between terminals 25 and 2 or 24 of the skid control ECU connector.
  
  Fig 2: Measure Voltage Between Terminals 25 & 2 Or 24
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  OK: 10 - 14 V
1. NG: CHECK AND REPLACE HARNESS AND CONNECTOR
2. OK: Go to next step.
CHECK ABS WARNING LIGHT
In case of using the hand-held tester:
1. Select the item "ABS WARN LIGHTxyr in the ACTIVE TEST and operate the ABS warning light on the hand-held tester.
2. Check that "ON" and "OFF" operation of the ABS warning light can be done on the combination meter by the hand-held tester.
In case of not using the hand-held tester:
1. Disconnect the skid control ECU connector.
2. Using a service wire, connect terminal WA (13) and GND (2 or 24) of the skid control ECU connector.
  
  Fig 3: Connecting Terminal WA & GND
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Turn the ignition switch ON.
OK: ABS warning light turns off
1. OK: CHECK AND REPLACE BRAKE ACTUATOR ASSY
2. NG: CHECK AND REPLACE HARNESS AND CONNECTOR