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Slip Indicator Light Circuit








BRAKE CONTROL: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: Slip Indicator Light Circuit

Slip Indicator Light Circuit

DESCRIPTION

The skid control ECU is connected to the No. 1 meter ECU via CAN communication. The slip indicator light blinks during VSC and/or TR(A)C operation to inform the driver of system operation and when a slip occurs. Also, during TR(A)C OFF mode, VSC OFF mode, or when TR(A)C / VSC operation is disabled, and the slip indicator light illuminates to inform the driver that TR(A)C and VSC operation are disabled. When the system fails, the slip indicator comes on to warn the driver. The slip indicator comes on when traction control is terminated by pressing the VSC OFF switch.

WIRING DIAGRAM





INSPECTION PROCEDURE
NOTE: When replacing the skid control ECU, perform the following operations:
- Initialization of linear solenoid valve and calibration Programming and Relearning
- Yaw rate and acceleration sensor zero point calibration Programming and Relearning

PROCEDURE

1. CHECK DTC FOR ALL SYSTEM
(a) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.
(b) Check for the DTC Reading and Clearing Diagnostic Trouble Codes.

Result





C -- GO TO LIN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)
B -- GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)
A -- Continue to next step.
2. PERFORM ACTIVE TEST USING INTELLIGENT TESTER OR TECHSTREAM (SLIP INDICATOR LIGHT)
(a) Connect the intelligent tester or Techstream to the DLC3.
(b) Turn the power switch ON (IG).
(c) Select the ACTIVE TEST mode on the intelligent tester or Techstream.
(1) Intelligent tester

METER:





(2) Techstream

Combination meter:





(d) Check that the slip indicator light turns on or off when using the intelligent tester or Techstream.
OK:
The slip indicator light turns on or off in accordance with the intelligent tester or Techstream.
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 Problem Symptoms Table.

NG -- GO TO METER AND GAUGE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)
OK -- Continue to next step.
3. PERFORM ACTIVE TEST USING INTELLIGENT TESTER OR TECHSTREAM (SLIP INDICATOR LIGHT)
(a) Connect the intelligent tester or Techstream to the DLC3.
(b) Turn the power switch ON (IG).
(c) Select the ACTIVE TEST mode on the intelligent tester or Techstream.
(1) Intelligent tester

ABS/VSC:





(2) Techstream

ABS/VSC/TRAC:





(d) Check that the slip indicator light turns on or off when using the intelligent tester or Techstream.
OK:
The slip indicator light turns on or off in accordance with the intelligent tester or Techstream.
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 Problem Symptoms Table.

NG -- REPLACE SKID CONTROL ECU
OK -- Continue to next step.
4. READ VALUE USING INTELLIGENT TESTER OR TECHSTREAM (TRC OFF SWITCH)
(a) Connect the intelligent tester or Techstream to the DLC3.
(b) Turn the power switch ON (IG).
(c) Select the DATA LIST mode on the intelligent tester or Techstream.
(1) Intelligent tester

Center console switch:





(2) Techstream

Center console switch:





(d) Check that "ON" and "OFF" of the VSC OFF switch turns on or off on the intelligent tester or Techstream.
OK:
The VSC OFF switch is operated, and the display changes as shown above.
HINT: The procedure above is performed to confirm the condition of the TR(A)C / VSC switch.

NG -- REPLACE COMBINATION SWITCH ASSEMBLY
OK -- Continue to next step.
5. READ VALUE USING INTELLIGENT TESTER OR TECHSTREAM (TRAC/VSC OFF SWITCH)
(a) Connect the intelligent tester or Techstream to the DLC3.
(b) Turn the power switch ON (IG).
(c) Select the DATA LIST mode on the intelligent tester or Techstream.
(1) Intelligent tester

ABS/VSC:





(2) Techstream

ABS/VSC/TRAC:





(d) Check that the VSC OFF switch turns on or off on the intelligent tester or Techstream.
OK:
VSC OFF switch is operated, and the display changes as shown above.
NG -- REPLACE SKID CONTROL ECU
OK -- USE SIMULATION METHOD TO CHECK
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