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 power switch on (READY).

Select the Active Test mode on Techstream.

ABS/VSC/TRAC:

ITEM RANGE 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 by using Techstream.

Result

DTC RESULT REFERENCE

Condition	Proceed to
Buzzer does not sound or sounds constantly	A
Buzzer sounds/stops	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: END

A: GO to next step

INSPECT SKID CONTROL BUZZER (POWER SOURCE TERMINAL)

Turn the power switch off.
Disconnect the skid control buzzer connector.

Fig 1: Identifying Skid Control Buzzer Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Turn the power switch on (IG).

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

Standard voltage

VOLTAGE SPECIFICATION

Tester Connection	Condition	Specified Condition
E13-2 - Body ground	Power 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. 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:
  
  The skid control buzzer sounds.
NG: REPLACE SKID CONTROL BUZZER

Fig 2: View Of Skid Control Buzzer
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: GO to next step

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

Turn the power switch off.
Disconnect the skid control ECU connector.

Fig 3: Identifying Skid Control ECU Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard resistance

RESISTANCE REFERENCE

Tester Connection	Condition	Specified Condition
A74-12 (BZ) - E13-1 (BZ)	Always	Below 1 Ω
A74-12 (BZ) - Body ground	Always	10 kΩ or higher
A74-33 (VBZ) - E13-2 (IG1)	Always	Below 1 Ω
A74-33 (VBZ) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: GO to next step

INSPECT SKID CONTROL ECU (GND TERMINAL)

Disconnect the skid control ECU connectors.

Fig 4: Identifying Skid Control ECU Connectors

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

Standard resistance

RESISTANCE REFERENCE

Tester Connection	Condition	Specified Condition
A73-1 (GND1) - Body ground	Always	Below 1 Ω
A74-2 (GND2) - Body ground	Always	Below 1 Ω
A74-1 (GND3) - Body ground	Always	Below 1 Ω
A75-2 (GND4) - Body ground	Always	Below 1 Ω
A75-1 (GND5) - Body ground	Always	Below 1 Ω
A76-4 (GND6) - Body ground	Always	Below 1 Ω

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 (GND CIRCUIT)

OK: REPLACE SKID CONTROL ECU