Toyota Tundra. Manual — part 955

Fig. 114: Identifying Skid Control Buzzer Circuit Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM (SKID CONTROL BUZZER)

a. Connect the Techstream to the DLC3.

b. Turn the ignition switch to ON and the Techstream on.

c. Select the Active Test mode on the Techstream.

ABS/VSC/TRAC:

DIAGNOSTIC NOTE TABLE

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

Techstream.

Result

RESULT TABLE

HINT:

If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the

NOTE:

When replacing the VSC actuator assembly, perform zero point calibration (See
CALIBRATION ).

Tester Display

Test Part

Control Range

Diagnostic Note

Buzzer

Skid control buzzer

ON/OFF

Buzzer can be heard

Result

Proceed to

Buzzer does not sound or sounds constantly

A

Buzzer sounds/stops

B

2009 Toyota Tundra

2009 BRAKES Brake Control - Tundra

table and proceed to the next step (See PROBLEM SYMPTOMS TABLE ).

B: REPLACE VSC ACTUATOR ASSEMBLY (See REMOVAL )

A: Go To Next Step

2. INSPECT SKID CONTROL BUZZER (POWER SOURCE TERMINAL)

a. Disconnect the J5 buzzer connector.

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

Standard Voltage

TESTER CONNECTION SPECIFIED CONDITION TABLE

Fig. 115: Identifying J5 Buzzer Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

OK: Go To Next Step

3. INSPECT SKID CONTROL BUZZER

a. Remove the skid control buzzer (See REMOVAL ).

b. 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.

Tester Connection

Switch Condition

Specified Condition

J5-2 - Body ground

Ignition switch ON

11 to 14 V

2009 Toyota Tundra

2009 BRAKES Brake Control - Tundra

Fig. 116: Identifying Skid Control Buzzer
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPLACE SKID CONTROL BUZZER ASSEMBLY (See REMOVAL )

OK: Go To Next Step

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

a. Disconnect the A17 ECU connector.

b. Disconnect the J5 skid control buzzer connector.

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester Connection

Condition

Specified Condition

A17-8 (BZ) - J5-1

Always

Below 1 ohms

A17-8 (BZ) - Body ground

Always

10 kohms or higher

2009 Toyota Tundra

2009 BRAKES Brake Control - Tundra

Fig. 117: Identifying A17 ECU Connector & J5 Skid Control Buzzer Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go To Next Step

5. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BODY GROUND)

a. Disconnect the A17 ECU connector.

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION TABLE

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 ).

Tester Connection

Condition

Specified Condition

A17-1 (GND1) - Body ground

Always

Below 1 ohms

2009 Toyota Tundra

2009 BRAKES Brake Control - Tundra