VSC OFF Indicator Light Remains ON

BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: VSC OFF Indicator Light Remains ON
- VSC OFF Indicator Light Remains ON

DESCRIPTION

The skid control ECU is connected to the combination meter via CAN communication.

Pressing the VSC OFF switch turns off traction control and pressing and holding this switch turns off traction and VSC controls. If VSC control is turned off, the VSC OFF indicator light will come on.

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
When replacing the brake booster with master cylinder (skid control ECU), perform initialization and calibration of the linear solenoid valve Initialization.

PROCEDURE

1. CHECK CAN COMMUNICATION SYSTEM

(a) Check if a CAN communication system DTC is output Diagnosis System.

Result:





B -- INSPECT CAN COMMUNICATION SYSTEM How to Proceed With Troubleshooting
A -- Continue to next step.

2. CHECK IF SKID CONTROL ECU CONNECTOR IS SECURELY CONNECTED

(a) Check if the skid control ECU connector is securely connected.

OK:

The connector is securely connected.

NG -- CONNECT CONNECTOR TO ECU CORRECTLY
OK -- Continue to next step.

3. CHECK AUXILIARY BATTERY

(a) Check the auxiliary battery voltage.

Standard Voltage:

11 to 14 V

NG -- CHARGE OR REPLACE AUXILIARY BATTERY
OK -- Continue to next step.

4. READ VALUE USING TECHSTREAM (VSC OFF SWITCH)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Select the Data List on the Techstream Data List / Active Test.

ABS/VSC/TRAC





(d) Using the Techstream, check the switch input and mode condition on the Techstream changes according to VSC OFF switch operation.

Result:





C -- CHECK SLIP INDICATOR LIGHT (INITIAL CHECK)

B -- INSPECT VSC OFF SWITCH
A -- Continue to next step.

5. INSPECT COMBINATION METER

(a) Turn the power switch off.

(b) Perform the Active Test of the combination meter (meter CPU) using the Techstream Scan Tool Testing and Procedures.

(c) Check the combination meter.

OK:

The VSC OFF indicator light turns on or off in accordance with the Techstream operation.

HINT
If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part Problem Symptoms Table.

NG -- REPLACE COMBINATION METER Removal

OK -- REPLACE BRAKE BOOSTER WITH MASTER CYLINDER Removal

6. INSPECT VSC OFF SWITCH

(a) Turn the power switch off.





(b) Disconnect the VSC OFF switch connector.

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

Standard Resistance:





Text in Illustration





NG -- REPLACE VSC OFF SWITCH Traction Control Switch
OK -- Continue to next step.

7. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - VSC OFF SWITCH)

(a) Disconnect the skid control ECU connector.

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

Standard Resistance:





HINT
If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step Problem Symptoms Table.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE BRAKE BOOSTER WITH MASTER CYLINDER Removal

8. CHECK SLIP INDICATOR LIGHT (INITIAL CHECK)

(a) Turn the power switch off.

(b) Turn the power switch on (IG) and check the slip indicator light comes on (initial check).

OK:

The slip indicator light comes on.

HINT
If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part Problem Symptoms Table.

NG -- REPLACE COMBINATION METER Removal

OK -- REPLACE BRAKE BOOSTER WITH MASTER CYLINDER Removal