VSC OFF Indicator Light Remains ON

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: VSC OFF Indicator Light Remains ON

VSC OFF Indicator Light Remains ON

DESCRIPTION

Operation of the VSC OFF switch changes the vehicle from normal mode to TRAC OFF mode (AUTO LSD mode) to VSC OFF mode. During normal mode, pressing the VSC OFF switch for a short amount of time changes vehicle to TRAC OFF mode. When the vehicle is stopped, pressing the VSC OFF switch for 3 seconds or more changes the vehicle to VSC OFF mode. During VSC OFF mode, the combination meter's VSC OFF indicator light and slip indicator light illuminate, and VSC, TRAC and AUTO LSD operation is disabled.
Also, when the skid control ECU stores DTCs, VSC and TRAC operation is disabled, and the combination meter's VSC TRAC warning light blinks.

WIRING DIAGRAM





















INSPECTION PROCEDURE

NOTE: When replacing the master cylinder solenoid, perform zero point calibration (Programming and Relearning).

PROCEDURE

1. CHECK DTC
(a) Check if DTCs for VSC are recorded.





B -- REPAIR CIRCUITS INDICATED BY OUTPUT DTCS
A -- Continue to next step.
2. CHECK SKID CONTROL ECU CONNECTOR
(a) Check the ECU connector's connecting condition.
OK:
The connector is securely connected.
NG -- CONNECT CONNECTOR CORRECTLY
OK -- Continue to next step.
3. INSPECT SKID CONTROL ECU (CSW TERMINAL)





(a) Disconnect the skid control ECU connector.
(b) Ground terminal CSW of the skid control ECU.
Standard:





(c) Reconnect the skid control ECU connector.
OK -- REPLACE MASTER CYLINDER SOLENOID
NG -- Continue to next step.
4. INSPECT VSC OFF SWITCH





(a) Remove the VSC OFF switch.
(b) Disconnect the VSC OFF switch connector.
(c) Measure the resistance.
Standard:





(d) Reconnect the VSC OFF switch connector.
(e) Reinstall the VSC OFF switch.
NG -- REPLACE VSC OFF SWITCH
OK -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR (VSC OFF SWITCH CIRCUIT)





(a) Disconnect the skid control ECU connector.
(b) Disconnect the VSC OFF switch connector.
(c) Measure the resistance.
Standard:





(d) Reconnect the VSC OFF switch connector.
(e) Reconnect the skid control ECU connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
6. INSPECT SKID CONTROL ECU (IG1 TERMINAL VOLTAGE)
(a) When using Techstream:
(1) Connect Techstream to the DLC3.
(2) Start the engine.
(3) Turn Techstream ON.
(4) Select the Data List mode on Techstream.
(5) Measure the voltage output from the ECU displayed on Techstream.

ABS/VSC/TRAC





OK:
"Normal" is displayed.
(b) When not using Techstream:





(1) Disconnect the skid control ECU connector.
(2) Turn the ignition switch to the ON position.
(3) Measure the voltage.
:





(4) Turn the ignition switch to OFF.
(5) Reconnect the skid control ECU connector.





C -- REPAIR OR REPLACE HARNESS OR CONNECTOR
B -- CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - COMBINATION METER)
A -- Continue to next step.
7. INSPECT REAR DIFFERENTIAL LOCK SWITCH





(a) Remove the rear diff. lock switch.
(b) Disconnect the rear diff. lock switch connector.
(c) Measure the resistance.
Standard:





(d) Reinstall the rear diff. lock switch.
(e) Reconnect the rear diff. lock switch connector.
NG -- REPLACE REAR DIFFERENTIAL LOCK SWITCH
OK -- Continue to next step.
8. CHECK HARNESS AND CONNECTOR (4WD CONTROL ECU - REAR DIFFERENTIAL LOCK SWITCH)





(a) Disconnect the 4WD control ECU connector.
(b) Disconnect the rear diff. lock connector.
(c) Measure the resistance.
Standard (4WD):





Standard (2WD):





(d) Reconnect the rear diff. lock connector.
(e) Reconnect the 4WD control ECU connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
9. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - COMBINATION METER)





(a) Disconnect the skid control ECU connector.
(b) Disconnect the combination meter connector.
(c) Measure the resistance.
Standard:





(d) Measure the resistance.
Standard:





(e) Reconnect the combination meter connector.
(f) Reconnect the skid control ECU connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
10. INSPECT COMBINATION METER ASSEMBLY
(a) Check the combination meter system (Problem Symptoms Table).
OK:
Combination meter is normal.
NG -- REPLACE COMBINATION METER ASSEMBLY
OK -- REPLACE MASTER CYLINDER SOLENOID