Skid Control Buzzer Circuit: Wiring Diagram

Fig 1: Skid Control Buzzer Circuit - Wiring Diagram

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NOTE: When replacing the ABS and TRACTION actuator assembly, perform zero point calibration (See CHECK FOR INTERMITTENT PROBLEMS ).

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.

ACTIVE TEST: ABS/VSC

ACTIVE TEST - ABS/VSC

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 REFERENCE

Buzzer	Operation 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.
Turn the engine switch on (IG).

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

Voltage

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
L24-2 - Body ground	Engine switch on (IG)	10 to 14 V

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

Fig 2: Identifying Skid Control Buzzer Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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.
  
  NG : REPLACE SKID CONTROL BUZZER
  
  Fig 3: Inspecting Skid Control Buzzer
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  OK : Go to next step

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

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

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

Resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
A6-30 (BZ) - L24-1	Below 1 Ω
A6-30 (BZ) - Body ground	10 kΩ or higher

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

Fig 4: Identifying Skid Control ECU Connector And Skid Control Buzzer Connector

OK : REPLACE ABS AND TRACTION ACTUATOR ASSEMBLY