TRAC OFF Indicator Light Remains ON
BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: TRAC OFF Indicator Light Remains ON
- TRAC 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 TRAC control is turned off, the TRAC OFF indicator light will come on.
If there is a malfunction in the SFI system, the TRAC system will turn off and the TRAC OFF indicator will turn on.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
When replacing the brake actuator assembly, perform zero point calibration and store system information Programming and Relearning.
PROCEDURE
1. CHECK SFI SYSTEM
(a) Check if SFI system DTCs are output.
for 2GR-FE Diagnosis System
for 1AR-FE Diagnosis System
Result
B -- CHECK SFI SYSTEM How to Proceed with Troubleshooting
C -- CHECK SFI SYSTEM How to Proceed with Troubleshooting
A -- Continue to next step.
2. CHECK CAN COMMUNICATION SYSTEM
(a) Check if a CAN communication system DTC is output Diagnosis System.
Result
B -- CHECK CAN COMMUNICATION SYSTEM How to Proceed With Troubleshooting
A -- Continue to next step.
3. CHECK IF SKID CONTROL ECU CONNECTOR IS SECURELY CONNECTED
(a) Check if the skid control ECU (brake actuator assembly) connector is securely connected.
OK:
The connector is securely connected.
NG -- CONNECT CONNECTOR TO ECU CORRECTLY
OK -- Continue to next step.
4. INSPECT BATTERY
(a) Check the battery voltage.
Standard voltage:
11 to 14 V
Result
B -- CHECK OR REPLACE CHARGING SYSTEM OR BATTERY Component Tests and General Diagnostics
C -- CHECK OR REPLACE CHARGING SYSTEM OR BATTERY Component Tests and General Diagnostics
A -- Continue to next step.
5. READ VALUE USING TECHSTREAM (VSC OFF SWITCH)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Chassis / ABS/VSC/ TRAC / Data List.
(e) Select the Data List on the Techstream Data List / Active Test.
ABS/VSC/TRAC
(f) Using the Techstream, check the switch condition on the Techstream changes according to VSC OFF switch operation.
OK:
The Techstream display changes according to VSC OFF switch operation.
NG -- INSPECT VSC OFF SWITCH
OK -- Continue to next step.
6. PERFORM ACTIVE TEST USING TECHSTREAM (TRAC OFF INDICATOR LIGHT)
(a) Reconnect the skid control ECU (brake actuator assembly) connector.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON.
(d) Turn the Techstream on.
(e) Enter the following menus: Body Electrical / Combination Meter / Active Test.
(f) Select the Active Test on the Techstream.
Combination Meter
(g) Check that the TRAC OFF indicator light on the combination meter turns on or off in accordance with the Techstream operation.
OK:
The TRAC 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 ASSEMBLY Removal
OK -- REPLACE BRAKE ACTUATOR ASSEMBLY Removal
7. INSPECT VSC OFF SWITCH
(a) Turn the ignition 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 Removal
OK -- Continue to next step.
8. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - VSC OFF SWITCH)
(a) Disconnect the skid control ECU (brake actuator assembly) 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 ACTUATOR ASSEMBLY Removal