Inspection Procedure

PREPARATION: 

Remove the ECU-IG fuse from the driver side J/B.

CHECK: 

Measure the resistance.

OK: 

Resistance: Below 1 Ω 

Fig 1: Identifying Location Of ECU-IG Fuse

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: Replace fuse. 
2. OK: Go To Next Step 

CHECK: 

Check the battery positive voltage.

OK: 

Voltage: 10 to 14 V 

1. NG: Check and repair charging system. 
2. OK: Go To Next Step 

When using the hand-held tester: 

PREPARATION: 

1. Connect the hand-held tester to the DLC3.
2. Turn the ignition switch ON and press the hand-held tester main switch ON.
3. Select the DATA LIST mode on the hand-held tester.

CHECK: 

Measure the voltage condition output from the ECU displayed on the hand-held tester.

OK: 

"Normal" is displayed. 

When not using the hand-held tester: 

PREPARATION: 

Disconnect the brake actuator connector.

CHECK: 

1. Turn the ignition switch ON.
2. Measure the voltage between terminal IG1 and GND1 of brake actuator harness side connector.

OK: 

Voltage: 10 to 14 V 

Fig 2: Identifying Terminals Of Brake Actuator Harness Side Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. OK: Replace brake actuator assembly. 
   NOTE: When replacing the brake actuator assembly, perform the zero point calibration (see PRE-CHECK ).
2. NG: Go To Next Step 

PREPARATION: 

Disconnect the brake actuator connector.

CHECK: 

Measure the resistance between terminal GND1 of the skid control ECU harness side connector and the body ground.

OK: 

Resistance: Below 1 Ω 

Fig 3: Identifying Terminals Of Skid Control ECU Harness Side Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: Repair or replace harness and connector. 
2. OK: Check for open circuit in harness and connector between skid control ECU and battery, skid control ECU and body ground (See  HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE  ).