Traction Control Switch Circuit [08/2014 - ]: Procedure

1. Check if CAN communication system DTCs are output (See article. Refer to DIAGNOSIS SYSTEM [08/2014 - 08/2015] Refer to DIAGNOSIS SYSTEM [08/2015 - ] ).

   Result

   Result	Proceed to
   DTCs are not output	A
   DTCs are output	B

Result:  B

B 

INSPECT CAN COMMUNICATION SYSTEM 

(See article. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2014 - ] )

Result:  A

A 

See step  2

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

   OK

   The connector is securely connected.

Result:  NG

NG 

CONNECT CONNECTOR TO ECU CORRECTLY 

Result:  OK

OK 

See step  3

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Select the Data List on the Techstream (See article. Refer to DATA LIST / ACTIVE TEST [08/2014 - ] ).
   ABS/VSC/TRAC
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   TRAC/VSC Off Mode	TR(A)C/VSC off mode / Normal, TRC OFF, Unknown or VSC OFF	Normal: Normal mode TRC OFF: TR(A)C off mode Unknown: Unspecified	-

4. Check the indicator light and mode condition on the Techstream changes according to combination switch (traction control switch) operation.

   Standard

   Switch Operation	Mode Condition Display	TR(A)C OFF Indicator Light
   Not pressed	Normal	Does not come on
   Pressing the combination switch (traction control switch)	TRC OFF	Comes on

   Result

   Result	Proceed to
   Indicator light and mode condition display do not change	A
   Mode condition display is normal, but indicator light does not change	B
   Indicator light and mode condition display is normal	C

Result:  B

B 

INSPECT METER / GAUGE SYSTEM 

(See article. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2014 - ] )

Result:  C

C 

CHECK FOR INTERMITTENT PROBLEMS 

(See article. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2014 - ] )

Result:  A

A 

See step  4

1. Select the Active Test on the Techstream (See article. Refer to DATA LIST / ACTIVE TEST [08/2014 - ] ).
   ABS/VSC/TRAC
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   TRC(TRAC) OFF Indicator Light	TR(A)C OFF indicator light	Indicator light ON/OFF	Observe combination meter

2. Check that the TR(A)C OFF indicator light on the combination meter turns on or off in accordance with the Techstream operation.

   OK

   The TR(A)C OFF indicator light turns on or off in accordance with the Techstream operation.

Result:  NG

NG 

See step  7

Result:  OK

OK 

See step  5

1. Turn the power switch off.
2. Inspect the combination switch (traction control switch) (See article. Refer to INSPECTION [08/2014 - ] ).

   OK

   Combination switch (traction control switch) is normal.

Result:  NG

NG 

REPLACE COMBINATION SWITCH 

(See article. Refer to REMOVAL [08/2014 - ] )

Result:  OK

OK 

See step  6

1. Disconnect the skid control ECU connector.
2. Disconnect the combination switch (traction control switch) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A61-8 (CSW) - H72-7 (+)	Always	Below 1 Ω
   A61-8 (CSW) or H72-7 (+) - Body ground	Always	10 kΩ or higher
   H72-14 (E) - Body ground	Always	Below 1 Ω

   HINT: 

   If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step (See article. Refer to PROBLEM SYMPTOMS TABLE [08/2014 - ] ).

Result:  OK

OK 

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER 

(See article. Refer to REMOVAL [08/2014 - ] )

Result:  NG

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Perform the Active Test of the combination meter (meter CPU) using the Techstream (See article. Refer to DATA LIST / ACTIVE TEST [08/2014 - ] ).
2. Check the combination meter.

   OK

   The TR(A)C OFF indicator light turns on or off in accordance with 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 parts (See article. Refer to PROBLEM SYMPTOMS TABLE [08/2014 - ] ).

Result:  OK

OK 

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER 

(See article. Refer to REMOVAL [08/2014 - ] )

Result:  NG

NG 

INSPECT METER / GAUGE SYSTEM 

(See article. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2014 - ] )