Inspection Procedure

NOTE: When replacing the ABS & TRACTION actuator assembly, perform zero point calibration (See CALIBRATION ).

PERFORM ACTIVE TEST USING TECHSTREAM (SKID CONTROL BUZZER)

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

Select "ACTIVE TEST" on Techstream.

ACTIVE TEST: ABS/VSC/TRAC

ACTIVE TEST REFERENCE

Item	Vehicle Condition/Test Details	Diagnostic Note
VSC H/B Warning Buzzer	Turns skid control buzzer ON/OFF	Buzzer is heard

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

Result

RESULT REFERENCE

Result	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 ).

B: Go to step 2

A: END

INSPECT SKID CONTROL BUZZER (POWER SOURCE TERMINAL VOLTAGE)

Disconnect the skid control buzzer connector.

Fig 1: Identifying D16 Skid Control Buzzer Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Turn the ignition switch on (IG).
Measure the voltage according to the value (s) in the table below.

Voltage

VOLTAGE SPECIFICATION

Tester Connection	Condition	Specified Condition
D18-2 - Body ground	Ignition switch on (IG)	10 to 14 V

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

OK: Go to next step

INSPECT SKID CONTROL BUZZER
1. Disconnect the skid control buzzer connector.
  
  Fig 2: Inspecting Skid Control Buzzer
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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.

NG: REPLACE SKID CONTROL BUZZER

OK: Go to next step

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

Disconnect the skid control ECU connector.
Measure the resistance according to the value (s) in the table below.

Resistance

RESISTANCE SPECIFICATION

Tester Connection	Specified Condition
A34-30 (BZ) - D18-1	Below 1 Ω
A34-30 (BZ) - Body ground	10 kΩ or higher

Fig 3: Identifying A34 Skid Control ECU And D18 Skid Control Buzzer Connectors

HINT:

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

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (BZ CIRCUIT)

OK: REPLACE ABS & TRACTION ACTUATOR ASSEMBLY