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Toyota Sienna Service Manual: TRAC OFF Indicator Light does not Come ON

DESCRIPTION

The skid control ECU is connected to the combination meter via CAN and multiplex communications.

When the traction OFF switch is turned on, the TRAC OFF indicator light will come on (for 2WD model).

WIRING DIAGRAM

Refer to TRAC OFF Indicator Light Remains ON (See page BC-157).

INSPECTION PROCEDURE

NOTICE: When replacing the brake actuator assembly, perform zero point calibration (See page BC-70).

1 CHECK CAN COMMUNICATION SYSTEM

(a) Check if the CAN communication system DTC is output (See page CA-17).

Result

2 CHECK MULTIPLEX COMMUNICATION SYSTEM

(a) Check if the multiplex communication system DTC is output (See page MP-14).

Result

3 CHECK TRAC OFF INDICATOR LIGHT

(a) Connect the intelligent tester to the DLC3.

(b) Start the engine.

(c) Select the Active Test mode on the intelligent tester (See page BC-85).

ABS / VSC:

(d) Check that "ON" and "OFF" of the TRAC OFF indicator light are indicated on the combination meter when using the intelligent tester.

OK: The TRAC OFF indicator light turns on or off in accordance with the intelligent tester.

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 page BC-79).

REPLACE BRAKE ACTUATOR ASSEMBLY

4 INSPECT COMBINATION METER ASSEMBLY

(a) Turn the ignition switch off.

(b) Perform Active Test of the combination meter (meter CPU) using the intelligent tester (See page ME-19).

OK: The TRAC OFF indicator light turns on or off in accordance with the intelligent tester.

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 page BC-79).

REPLACE BRAKE ACTUATOR ASSEMBLY

TRAC OFF Indicator Light Remains ON
DESCRIPTION The skid control ECU is connected to the combination meter via CAN and multiplex communications. When the traction OFF switch is turned on, the TRAC OFF indicator light will come o ...

Slip Indicator Light Remains ON
DESCRIPTION The skid control ECU is connected to the combination meter via CAN and multiplex communications. The SLIP indicator blinks during VSC and/or TRAC operation. When the system fails, ...

Other materials:

Removal
HINT: Replace the RH side using the same procedures as for the LH side. 1. REMOVE FRONT WHEEL 2. REMOVE FRONT AXLE HUB LH NUT (See page DS- 5) 3. SEPARATE SPEED SENSOR FRONT LH (See page DS-5) 4. SEPARATE FRONT DISC BRAKE CALIPER ASSEMBLY LH (a) Remove the 2 bolts and separate the front ...

Terminals of ECU
1. JUNCTION CONNECTOR Junction connector with VSC HINT: *1: with Dynamic laser cruise control without VSC CAN junction connector (with VSC) with VSC The connection diagram of the components which are connected to the CAN junction connector. 2. DLC3 ...

Engine coolant
The coolant level is satisfactory if it is between the “FULL” and “LOW” lines on the reservoir when the engine is cold. Reservoir cap “FULL” line “LOW” line If the level is on or below the “LOW” line, add coolant up to the “FULL” line. Coolant selection On ...

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