Inspection Procedure

1. Check if a CAN communication system DTC is output (see DIAGNOSIS SYSTEM ).

   Result 

   RESULT REFERENCE
   
   

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

B: REPAIR CAN COMMUNICATION SYSTEM  (See HOW TO PROCEED WITH TROUBLESHOOTING )

A: Go to next step 

1. Check if a multiplex communication system DTC is output (See DTC CHECK / CLEAR ).

   Result 

   RESULT REFERENCE
   
   

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

B: REPAIR MULTIPLEX COMMUNICATION SYSTEM  (See HOW TO PROCEED WITH TROUBLESHOOTING )

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  (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE )

OK: Go to next step 

1. Check the battery voltage.

   Standard voltage: 

   10 to 14 V 

NG: INSPECT CHARGING SYSTEM  (See ON-VEHICLE INSPECTION )

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch ON (IG).
3. Select the Data List mode on the Techstream (See DATA LIST / ACTIVE TEST  ).

   ABS/VSC/TRAC: 

   TESTER DISPLAY REFERENCE CHART
   
   

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

4. Using the Techstream, check the switch condition on the Techstream changes according to VSC OFF switch operation.

   OK: 

   The Techstream display changes according to VSC OFF switch operation. 

NG:  Go to step  7

OK: Go to next step 

1. Check the combination meter (See ON-VEHICLE INSPECTION ).

   OK: 

   The combination meter is normal. 

   HINT:

   If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part (See PROBLEM SYMPTOMS TABLE  ).

NG: REPLACE COMBINATION METER ASSEMBLY  (See REMOVAL )

OK: REPLACE SKID CONTROL ECU  (See REMOVAL  )

1. Remove the VSC OFF switch.
2. Disconnect the VSC OFF switch connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   3-4	Switch is not pushed in	10 kΩ or higher

Fig 1: Identifying VSC OFF Switch Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE VSC OFF SWITCH 

OK: Go to next step 

1. Disconnect the skid control ECU connector and the VSC OFF switch connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   A15-41 (CSW) - K43-3	Always	Below 1 Ω
   A15-41 (CSW) - Body ground	Always	10 kΩ or higher
   K43-4 - Body ground	Always	Below 1 Ω

   HINT:

   If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step (See PROBLEM SYMPTOMS TABLE  ).

   Fig 2: Identifying A15 Skid Control ECU Connector K43 And VSC OFF Switch Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE SKID CONTROL ECU  (See REMOVAL  )