Vehicle Stability Control System - Trc Off Indicator Light Does Not Come On
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK CAN COMMUNICATION LINE
CHECK DTC (CAN COMMUNICATION SYSTEM)
READ VALUE USING GTS (TRC/VSC OFF MODE)
INSPECT VSC OFF SWITCH
CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - VSC OFF SWITCH)
VEHICLE STABILITY CONTROL SYSTEM - TRC OFF Indicator Light does not Come ON
DESCRIPTION
The skid control ECU (master cylinder solenoid) is connected to the combination meter via the CAN communication system.
WIRING DIAGRAM
Refer to TRC OFF Indicator Light Remains ON ().
INSPECTION PROCEDURE
- After replacing the master cylinder solenoid, perform zero point calibration and store the system information ().
| 1.CHECK CAN COMMUNICATION LINE
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Turn the ignition switch off.
Connect the GTS to the DLC3.
Turn the ignition switch to ON and the GTS on.
Select "CAN Bus Check" from the System Selection Menu screen, and follow the prompts on the screen to inspect the CAN Bus.
- OK:
- "CAN Bus Check" indicates no malfunctions in CAN communication.
Result| Result | Proceed to |
| OK | A |
| NG (for LHD) | B |
| NG (for RHD) | C |
| | GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) ()
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| | GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) ()
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| 2.CHECK DTC (CAN COMMUNICATION SYSTEM)
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Turn the ignition switch off.
Connect the GTS to the DLC3.
Turn the ignition switch to ON and the GTS on.
Check for DTCs (for LHD: , for RHD: ).
Result| Result | Proceed to |
| CAN system DTC is not output | A |
| CAN system DTC is output (for LHD) | B |
| CAN system DTC is output (for RHD) | C |
| | GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) ()
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| | GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) ()
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| 3.READ VALUE USING GTS (TRC/VSC OFF MODE)
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Turn the ignition switch off.
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Enter the following menus: Chassis / ABS/VSC/TRC / Data List.
ABS/VSC/TRC| Tester Display | Measurement Item/Range | Normal Condition | Diagnostic Note |
| TRC/VSC Off Mode | TRC/VSC off mode/ Normal, TRC OFF, Unknown or VSC OFF | Normal: Normal mode
TRC OFF: TRC OFF mode
VSC OFF: VSC OFF mode | - |
Check that the mode display changes according to VSC OFF switch operation.
- OK:
- Display changes according to switch operation.
| OK | |
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| GO TO METER / GAUGE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) ()
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Remove the VSC OFF switch ().
Inspect the VSC OFF switch ().
| | REPLACE VSC OFF SWITCH ()
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| 5.CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - VSC OFF SWITCH)
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Turn the ignition switch off.
Disconnect the A24 skid control ECU (master cylinder solenoid) connector.
Disconnect the G13 VSC OFF switch connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| A24-9 (CSW) - G13-6 | Always | Below 1 Ω |
| A24-9 (CSW) - Body ground | Always | 10 kΩ or higher |
| G13-3 - Body ground | Always | Below 1 Ω |
Result| Result | Proceed to |
| NG | A |
| OK (for LHD) | B |
| OK (for RHD) | C |
| | REPLACE MASTER CYLINDER SOLENOID ()
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| | REPLACE MASTER CYLINDER SOLENOID ()
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| A | |
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| REPAIR OR REPLACE HARNESS OR CONNECTOR |
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