Toyota Tundra (2015 year). Manual — part 266
A
Last Modified: 9-16-2014
6.6 J
Doc ID: RM000003QXW022X
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: TRAC OFF Indicator Light does not Come ON;
2015 MY Tundra [08/2014 - ]
TRAC OFF Indicator Light does not Come ON
DESCRIPTION
The skid control ECU is connected to the combination meter via the CAN communication system.
WIRING DIAGRAM
Refer to TRAC OFF indicator light circuit
.
INSPECTION PROCEDURE
NOTICE:
When replacing the VSC actuator assembly, perform zero point calibration
.
PROCEDURE
1.
INSPECT CAN COMMUNICATION SYSTEM
(a) Check if a CAN communication system DTC is output
.
Result
RESULT
PROCEED TO
DTC is not output
A
DTC is output
B
B
GO TO CAN COMMUNICATION SYSTEM
2.
INSPECT CONNECTOR CONNECTION CONDITION
(a) Check the skid control ECU connector connection condition.
OK:
The connector is securely connected.
BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: ...
OK
OK
NG
CONNECT CONNECTOR CORRECTLY
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
SWITCH
CONDITION
SPECIFIED
CONDITION
A17-8 (IG1) - Body
ground
Ignition switch ON
11 to 14 V
Standard Resistance:
TESTER CONNECTION
CONDITION SPECIFIED CONDITION
A17-16 (GND1) - Body ground
Always
Below 1 Ω
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
4.
PERFORM ACTIVE TEST USING TECHSTREAM (TRC(TRAC) OFF 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 TRAC OFF indicator light using the Techstream.
ABS/VSC/TRAC
BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: ...
OK
TESTER DISPLAY
TEST PART
CONTROL RANGE
DIAGNOSTIC NOTE
TRC(TRAC) OFF Indicator Light
TRAC OFF indicator light*1
TRAC OFF indicator*2
ON / OFF
Observe combination meter
(e) Check that the TRAC OFF indicator light*1 or TRAC OFF display*2 on the combination meter
assembly turn on or off in accordance with the Techstream operation.
OK:
The TRAC OFF indicator light*1 or TRAC OFF display*2 on the combination meter assembly turns on or off
in accordance with the Techstream operation.
HINT:
When the TRAC OFF indicator light remains illuminated*1 or TRAC OFF displayed*2, there may be an open
*2: w/ Multi-information Display
NG
GO TO METER / GAUGE SYSTEM
5.
INSPECT VSC OFF SWITCH
(a) Remove the VSC OFF switch
.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
TESTER CONNECTION
SWITCH CONDITION
SPECIFIED CONDITION
6 - 9
Switch is pressed
Below 1 Ω
Switch is not pressed
10 kΩ or higher
BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: ...
OK
NG
REPLACE VSC OFF SWITCH
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
CONDITION
SPECIFIED CONDITION
A17-4 (CSW) - J22-9
Always
Below 1 Ω
A17-4 (CSW) - Body ground
Always
10 kΩ or higher
J22-6 - Body ground
Always
Below 1 Ω
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE VSC ACTUATOR ASSEMBLY
BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: ...
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