VSC OFF Indicator Light Circuit: Procedure

1. Turn the ignition switch ON.
2. Check that the VSC OFF indicator light turns on.
3. Check for DTC. Refer to DTC CHECK / CLEAR .
   RESULT
   
   

   Result	Proceed to
   DTC is not output	A
   DTC is output	B

B → REPAIR CIRCUITS INDICATED BY OUTPUT 

A: Go to next step 

Fig 1: Inspecting VSC OFF Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the VSC OFF switch.
2. Measure the resistance of the switch.

   Standard resistance

   Tester Connection	Switch Condition	Specified Condition
   1 - 2	Pushed	Below 1 Ω
   1 - 2	Released	10 kΩ or higher

NG → REPLACE VSC OFF SWITCH 

OK: Go to next step 

Fig 2: Checking Wire Harness (VSC OFF Switch - Skid Control ECU And Body Ground)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the V7 switch connector.
2. Disconnect the S6 ECU connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance

   Tester Connection	Specified Condition
   S6-12 (CSW) - V7-2	Below 1 Ω
   S6-12 (CSW) - Body ground	10 kΩ or higher
   V7-1 - Body ground	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

1. Check that each ECU connector is properly installed.

   OK

   Each ECU connector is properly installed.

NG → CONNECT CONNECTOR TO ECU CORRECTLY 

OK: Go to next step 

1. Check the Data List for proper functioning of the IG voltage.
   ABS/VSC/TRAC
   
   

   Tester Display	Measurement Item/ Range	Normal Condition	Diagnostic Note
   ECU IG Power Voltage	ECU power supply voltage /LOW/NORMAL/HIGH	LOW: Below 10 V NORMAL: 10 to 14 V HIGH: 14 V or more	-

   RESULT
   
   

   Result	Proceed to
   Display is not NORMAL	A
   Display is NORMAL	B

B → REPLACE SKID CONTROL ECU 

A: Go to next step 

1. Disconnect the S5, S7 and S8 ECU connectors.
   Fig 3: Checking Wire Harness (Skid Control ECU - Battery And Body Ground)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the ignition switch ON.
3. Measure the voltage of the wire harness side connectors.

   Standard voltage

   Tester Connection	Specified Condition
   S7-6 (IG1) - S5-16 (GND4)	10 to 14 V
   S7-6 (IG1) - S5-22 (GND3)	10 to 14 V
   S7-6 (IG1) - S8-6 (GND2)	10 to 14 V
   S7-6 (IG1) - S8-31 (GND1)	10 to 14 V
   S7-6 (IG1) - Body ground	10 to 14 V

4. Measure the resistance of the wire harness side connectors.

   Standard resistance

   Tester Connection	Specified Condition
   S5-16 (GND4) - Body ground	Below 1 Ω
   S5-22 (GND3) - Body ground	Below 1 Ω
   S8-6 (GND2) - Body ground	Below 1 Ω
   S8-31 (GND1) - Body ground	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

1. Check for open and short circuits in the multiplex communication system between the skid control ECU and combination meter.

NG → REPAIR OR REPLACE MULTIPLEX COMMUNICATION SYSTEM 

OK: Go to next step 

1. Check the combination meter. Refer to PROBLEM SYMPTOMS TABLE .

NG → REPAIR OR REPLACE COMBINATION METER 

OK → REPLACE SKID CONTROL ECU