Inspection Procedure

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

PERFORM ACTIVE TEST BY INTELLIGENT TESTER (SKID CONTROL BUZZER)

Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG) and turn the intelligent tester main switch on.

Select the ACTIVE TEST mode on the intelligent tester.

ABS / VSC:

ABS / VSC REFERENCE CHART

Item (Display)	Vehicle Condition/Test Details	Diagnostic Note
BUZZER	Turns skid control buzzer ON/OFF	Buzzer can be heard

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

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 ).

B: Go to step 2

A: END

INSPECT SKID CONTROL BUZZER (POWER SOURCE TERMINAL)

Disconnect the skid control buzzer connector.
Turn the engine switch on (IG).

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

Voltage

TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

Tester Connection	Condition	Specified Condition
K11-2 - Body ground	Engine switch on (IG)	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 (POWER SOURCE CIRCUIT)

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 (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

TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

Tester Connection	Specified Condition
A13-6 (BZ) - K11-1	Below 1 Ω
A13-6 (BZ) - Body ground	10 kΩ or higher
A13-22 (VBZ) - K11-2	Below 1 Ω
A13-22 (VBZ) - Body ground	10 kΩ or higher

Fig 3: Identifying Skid Control ECU And Buzzer Connector Terminals

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

INSPECT SKID CONTROL ECU (GND TERMINAL)

Disconnect the skid control ECU (A13, A15) connectors.

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

Resistance

TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

Tester Connection	Specified Condition
A13-1 (GND) - Body ground	Below 1 Ω
A15-1 (GND4) - Body ground	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 ).

Fig 4: Identifying Skid Control ECU (A13, A15) Connector Terminals

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

OK: REPLACE SKID CONTROL ECU