Inspection Procedure

NOTE: When replacing the skid control ECU, perform initialization of linear solenoid valve and calibration (See INITIALIZATION ).

PERFORM ACTIVE TEST BY TECHSTREAM (SKID CONTROL BUZZER)

Connect Techstream to the DLC3.
Turn the ignition switch on and turn the Techstream main switch on.

Select Active Test mode on Techstream.

ABS/VSC/TRAC:

ABS/VSC/TRAC ACTIVE TEST REFERENCE

Tester Display	Test Part	Control Range	Diagnostic Note
Buzzer	Skid control buzzer	Buzzer ON/OFF	Buzzer can be heard

Check that the buzzer sounds/stops when turning the skid control buzzer on/off using Techstream.

Result

RESULT CHART

Condition	Proceed To
Buzzer sounds/stops	A
Buzzer does not sound or sounds constantly	B

HINT:

If troubleshooting has been carried out according to the PROBLEM SYMPTOMS TABLE, refer back to the table and proceed to the next step (See PROBLEM SYMPTOMS TABLE ).

A: END

B: Go to Next Step

INSPECT SKID CONTROL BUZZER (POWER SOURCE TERMINAL)

Disconnect the skid control buzzer connector.
Turn the ignition switch on.

Measure the voltage according to the value(s) in the table below.

Voltage

VOLTAGE SPECIFICATION CHART

Tester Connection	Condition	Specified Condition
V8-2 - Body ground	Ignition switch on	10 to 14 V

Fig 1: Identifying Skid Control Buzzer Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

INSPECT SKID CONTROL BUZZER
1. Disconnect the skid control buzzer connector.
2. Apply battery negative voltage to terminal 1, and battery positive voltage to terminal 2 of the skid control buzzer, and then check that the buzzer sounds.
  OK: Skid control buzzer sounds.
  
  Fig 2: Inspecting Skid Control Buzzer
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPLACE SKID CONTROL BUZZER

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (BETWEEN SKID CONTROL ECU AND SKID CONTROL BUZZER)

Disconnect the skid control buzzer connector and the skid control ECU connector.

Measure the resistance according to the value(s) in the table below.

Resistance

RESISTANCE SPECIFICATION CHART

Tester Connection	Specified Condition
S39-33 (VBZ) - V8-2 (VBZ)	Below 1 Ω
S39-12 (BZ) - V8-1(BZ)	Below 1 Ω

Measure the resistance according to the value(s) in the table below.

Resistance

RESISTANCE SPECIFICATION CHART

Tester Connection	Specified Condition
S39-33 (VBZ) - Body ground	10 kΩ or higher
S39-12 (BZ) - Body ground	10 kΩ or higher

Fig 3: Identifying Skid Control Buzzer Connector And Skid Control ECU Connector

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

INSPECT SKID CONTROL ECU (GND TERMINAL)

Measure the resistance according to the value(s) in the table below.

Resistance

RESISTANCE SPECIFICATION CHART

Tester Connection	Specified Condition
S38-1 (GND1) - Body ground	Below 1 Ω
S39-2 (GND2) - Body ground	Below 1 Ω
S39-1 (GND3) - Body ground	Below 1 Ω
S40-2 (GND4) - Body ground	Below 1 Ω
S40-1 (GND5) - Body ground	Below 1 Ω
S41-4 (GND6) - Body ground	Below 1 Ω

Fig 4: Identifying Skid Control ECU Connector Terminals

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE SKID CONTROL ECU