Toyota Tundra. Manual — part 952
B: GO TO CAN COMMUNICATION SYSTEM (See HOW TO PROCEED WITH
TROUBLESHOOTING )
A: Go To Next Step
2. INSPECT CONNECTOR CONNECTION CONDITION
a. Check the skid control ECU connector connection condition.
OK: The connector is securely connected.
NG: CONNECT CONNECTOR CORRECTLY
OK: Go To Next Step
3. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BATTERY AND BODY
GROUND)
a. Disconnect the A17 ECU connector.
b. Measure the voltage and resistance according to the value (s) in the table below.
Standard Voltage
TESTER CONNECTION SPECIFIED CONDITION TABLE
Standard Resistance
TESTER CONNECTION SPECIFIED CONDITION TABLE
DTC is not output
A
DTC is output
B
Tester Connection
Switch Condition
Specified Condition
A17-9 (IG1) - Body ground
Ignition switch ON
11 to 14 V
Tester Connection
Condition
Specified Condition
A17-1 (GND1) - Body ground
Always
Below 1 ohms
2009 Toyota Tundra
2009 BRAKES Brake Control - Tundra
Fig. 105: Identifying A17 ECU Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: Go To Next Step
4. PERFORM ACTIVE TEST USING TECHSTREAM (SLIP INDICATOR LIGHT)
a. Connect the Techstream to the DLC3.
b. Turn the ignition switch to ON.
c. Turn the Techstream on.
d. Select the Active Test mode and operate the SLIP indicator light using the Techstream.
ABS/VSC/TRAC
DIAGNOSTIC NOTE TABLE
e. Check that the SLIP indicator light turns on and off in the combination meter when using the
Techstream.
OK: The SLIP indicator light turns on and off in accordance with the Techstream operation.
NG: GO TO METER/GAUGE SYSTEM (See HOW TO PROCEED WITH
TROUBLESHOOTING )
OK: Go To Next Step
5. INSPECT VSC OFF SWITCH
Tester Display
Test Part
Control Range
Diagnostic Note
Slip Indicator Light
SLIP indicator light
ON/OFF
Observe combination
meter
2009 Toyota Tundra
2009 BRAKES Brake Control - Tundra
a. Remove the VSC OFF switch (See REMOVAL ).
b. Measure the resistance according to the value (s) in the table below.
Standard Resistance
TESTER CONNECTION SPECIFIED CONDITION TABLE
Fig. 106: Identifying VSC Off Switch Connector Terminal
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPLACE VSC OFF SWITCH
OK: Go To Next Step
6. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - VSC OFF SWITCH AND
BODY GROUND)
a. Disconnect the A17 ECU connector.
b. Disconnect the J22 switch connector.
c. Measure the resistance according to the value (s) in the table below.
Standard Resistance
TESTER CONNECTION SPECIFIED CONDITION TABLE
Tester Connection
Switch Condition
Specified Condition
6-9
Switch is pressed
Below 1 ohms
Switch is not pressed
10 kohms or higher
Tester Connection
Condition
Specified Condition
A17-13 (CSW) - J22-9
Always
Below 1 ohms
A17-13 (CSW) - Body ground
Always
10 kohms or higher
J22-6 - Body ground
Always
Below 1 ohms
2009 Toyota Tundra
2009 BRAKES Brake Control - Tundra
Fig. 107: Identifying A17 ECU Connector And J22 Switch Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: REPLACE VSC ACTUATOR ASSEMBLY (See REMOVAL )
AUTO LSD INDICATOR LIGHT REMAINS ON
DESCRIPTION
When the vehicle is stopped and the VSC OFF switch is pressed for 3 seconds or more, the AUTO LSD
function is activated and the AUTO LSD indicator light illuminates.
WIRING DIAGRAM
2009 Toyota Tundra
2009 BRAKES Brake Control - Tundra
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