TRAC OFF Indicator Light Remains ON: Procedure

B → See step   9 

C → See step   12 

A: Go to next step 

1. Check if the skid control ECU connector is securely connected.

   OK

   The connector is securely connected.

NG → CONNECT CONNECTOR TO ECU CORRECTLY 

OK: Go to next step 

1. Check the auxiliary battery voltage.

   Standard Voltage

   11 to 14 V

NG → CHARGE OR REPLACE AUXILIARY BATTERY 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Select the Data List on the Techstream, refer to DATA LIST / ACTIVE TEST .
   ABS/VSC/TRAC
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   TRC(TRAC)/VSC OFF SW	VSC OFF switch / ON or OFF	ON: Switch on OFF: Switch off	-
   TRAC/VSC Off Mode	VSC OFF switch / Normal, TRC OFF, Unknown or VSC OFF	Normal: Normal mode TRC OFF: TRAC off mode VSC OFF: VSC off mode	-

4. Using the Techstream, check that the switch input and mode condition displayed on the Techstream change according to VSC OFF switch operation.

   Result

   Result	Proceed to
   OK	A
   NG (Switch input and mode condition display do not change.)	B
   NG (Switch input is normal, but mode condition display does not change.)	C

B → See step   6 

C → See step   8 

A: Go to next step 

1. Turn the ignition switch off.
2. Perform the Active Test of the combination meter (meter CPU) using the Techstream, refer to DATA LIST / ACTIVE TEST .
3. Check the combination meter.

   OK

   The TRAC OFF indicator light turns on and 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 suspected area before replacing the part, refer to PROBLEM SYMPTOMS TABLE .

NG → See step   10 

OK → See step   8 

1. Turn the ignition switch off.
   Fig 1: Identifying VSC OFF Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the VSC OFF switch connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   9 (+) - 6 (E)	Switch is pushed in	Below 1 Ω
   9 (+) - 6 (E)	Switch is not pushed in	10 kΩ or higher

NG → See step   11 

OK: Go to next step 

1. Disconnect the A44 skid control ECU connector.
   Fig 2: Identifying Skid Control ECU Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A44-19 (CSW) - D75-9 (+)	Always	Below 1 Ω
   A44-19 (CSW) - Body ground	Always	10 kΩ or higher
   D75-6 (E) - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Skid Control ECU)
   *2	Front view of wire harness connector (to VSC OFF Switch)

   HINT: 

   If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next suspected area, refer to PROBLEM SYMPTOMS TABLE .

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   8