VSC OFF Switch Circuit [06/2015 - ]: Procedure

1. Check if CAN communication system DTCs are output.

   Refer to DIAGNOSIS SYSTEM [06/2015 - 01/2018] , or refer to DIAGNOSIS SYSTEM [01/2018 - 11/2018] , or refer to DIAGNOSIS SYSTEM [11/2018 - ]

   Result

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

Result: 

B 

INSPECT CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2015 - 11/2018]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ] 

Result: 

A 

See step  2

1. Check if the skid control ECU assembly (brake booster with master cylinder assembly) connector is securely connected.

   OK

   The connector is securely connected.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

CONNECT CONNECTOR TO SKID CONTROL ECU ASSEMBLY CORRECTLY 

Result: 

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.

   Refer to DATA LIST / ACTIVE TEST [06/2015 - ]

   Chassis > ABS/VSC/TRAC > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   TRAC/VSC Off Mode	TRAC/VSC off mode	Normal, TRAC OFF, Unknown or VSC OFF	Normal: Normal mode TRAC OFF: TRAC off mode VSC OFF: VSC off mode	Unknown: Unspecified

   Chassis > ABS/VSC/TRAC > Data List 

   Tester Display
   TRAC/VSC Off Mode

4. Check the indicator light and mode condition on the Techstream changes according to VSC OFF switch (integration control and panel assembly) operation.

   Standard

   Switch Operation	Mode Condition Display	Multi-information Display (TRAC OFF Message)	VSC OFF Indicator Light
   Not pressed	Normal	Not displayed	Does not come on
   Pressing the VSC OFF switch	TRAC OFF	Displayed	Does not come on
   Pressing and holding the VSC OFF switch	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 is normal.	C

Result: 

B 

INSPECT METER / GAUGE SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2015 - ] 

Result: 

C 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2015 - 11/2018]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ] 

Result: 

A 

See step  4

1. Select the Active Test on the Techstream.

   Refer to DATA LIST / ACTIVE TEST [06/2015 - ]

   Chassis > ABS/VSC/TRAC > Active Test 

   Tester Display	Measurement Item	Control Range	Diagnostic Note
   TRC (TRAC) OFF Indicator Light	Multi-information display (TRAC OFF message)	Display ON/OFF	Observe combination meter assembly
   VSC OFF Indicator Light	VSC OFF indicator light	Indicator light ON/OFF	Observe combination meter assembly

   Chassis > ABS/VSC/TRAC > Active Test 

   Tester Display
   TRC (TRAC) OFF Indicator Light

   Chassis > ABS/VSC/TRAC > Active Test 

   Tester Display
   VSC OFF Indicator Light

2. Check the multi-information display (TRAC OFF message) and VSC OFF indicator light on the combination meter assembly turns ON or OFF in accordance with the Techstream operation.

   OK

   The multi-information display (TRAC OFF message) and VSC OFF indicator light turns ON or OFF in accordance with the Techstream operation.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  8

Result: 

OK 

See step  5

1. Disconnect the G49 integration control and panel assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Integration Control and Panel Assembly)

2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   G49-15 (+) - Body ground	Power switch on (IG)	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  7

Result: 

OK 

See step  6

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G49-16 (GND) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE INTEGRATION CONTROL AND PANEL ASSEMBLY. Refer to  REMOVAL [06/2015 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the A63 skid control ECU (brake booster with master cylinder assembly) connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A63-8 (CSW) - G49-15 (+)	Always	Below 1 Ω
   A63-8 (CSW) or G49-15 (+) - Body ground	Always	10 kΩ or higher
   G49-16 (GND) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY. Refer to  REMOVAL [06/2015 - 11/2018]  , or refer to  REMOVAL [11/2018 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Turn the power switch off.
2. Perform the Active Test of the combination meter assembly (meter CPU) using the Techstream.

   Refer to DATA LIST / ACTIVE TEST [06/2015 - 01/2018] , or refer to DATA LIST / ACTIVE TEST [01/2018 - 11/2018] , or refer to DATA LIST / ACTIVE TEST [11/2018 - ]

   Body Electrical > Combination Meter > Active Test 

   Tester Display
   Meter Display 1

   Body Electrical > Combination Meter > Active Test 

   Tester Display
   Indicat. VSC OFF

3. Check the combination meter assembly.

   OK

   The multi-information display and VSC OFF indicator light turns on or off in accordance with the Techstream operation.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY. Refer to  REMOVAL [06/2015 - 11/2018]  , or refer to  REMOVAL [11/2018 - ] 

Result: 

NG 

INSPECT METER / GAUGE SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2015 - ]