VSC OFF Switch Circuit [06/2018 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Enter the following menus: Chassis / Brake/EPB / Data List.

   Chassis > Brake/EPB > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   TRC(TRAC)/VSC OFF Mode	TRAC/VSC off mode	Normal mode (TRC(TRAC) ON/VSC ON) / TRC(TRAC) OFF mode (TRC(TRAC) OFF/VSC ON) / Not defined / VSC OFF mode (TRC(TRAC) OFF/VSC OFF)	Normal mode (TRC(TRAC) ON/VSC ON): Normal mode TRC(TRAC) OFF mode (TRC(TRAC) OFF/VSC ON): TRAC off mode Not defined: Not defined VSC OFF mode (TRC(TRAC) OFF/VSC OFF): VSC off mode	-

   Chassis > Brake/EPB > Data List 

   Tester Display
   TRC(TRAC)/VSC OFF Mode

4. Check the indicator light and mode condition on the Techstream changes according to VSC OFF switch operation.

   Standard

   Switch Operation	Mode Condition Display	Multi-information Display ("Traction Control Turned Off")	VSC OFF Indicator Light
   Not pressed	Normal mode (TRC(TRAC) ON/VSC ON)	Not displayed	Does not come on
   Pressing the VSC OFF switch	TRC(TRAC) OFF mode (TRC(TRAC) OFF/VSC ON)	Displayed	Does not come on
   Pressing and holding the VSC OFF switch	VSC OFF mode (TRC(TRAC) OFF/VSC OFF)	Displayed	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 are normal	C

Result: 

B 

INSPECT METER / GAUGE SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ] 

Result: 

C 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ] 

Result: 

A 

See step  2

1. Make sure that there is no looseness at the locking part and the connecting part of the connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (VSC OFF Switch)

   OK

   The connector is securely connected.

2. Disconnect the H13 VSC OFF switch connector.
3. Check both the connector case and the terminal for deformation and corrosion.

   OK

   No deformation or corrosion.

4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   2 (+) - 7 (E)	Switch pushed	Below 1 Ω
   2 (+) - 7 (E)	Switch not pushed	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE VSC OFF SWITCH. Refer to  REMOVAL [06/2018 - 08/2021]  , or refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

Result: 

OK 

See step  3

1. Make sure that there is no looseness at the locking part and the connecting part of the connector.

   OK

   The connector is securely connected.

2. Disconnect the A40 skid control ECU (brake actuator assembly) connector.
3. Disconnect the H13 VSC OFF switch connector.
4. Check both the connector case and the terminals for deformation and corrosion.

   OK

   No deformation or corrosion.

5. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   H13-2 (+) - A40-38 (CSW)	Always	Below 1 Ω
   H13-2 (+) or A40-38 (CSW) - Body ground	Always	10 kΩ or higher
   H13-7 (E) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE BRAKE ACTUATOR ASSEMBLY. Refer to  REMOVAL [06/2018 - 08/2020]  , or refer to  REMOVAL [08/2020 - 08/2021]  , or refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR