VEHICLE STABILITY CONTROL SYSTEM VSC OFF Indicator Light Remains ON

DESCRIPTION

The skid control ECU (brake actuator assembly) is connected to the combination meter assembly via CAN communication.

for Segment Display Type:

Pressing the VSC OFF switch (traction control switch) turns off traction control and pressing and holding this switch turns off traction and VSC controls. If traction control turns OFF, the TRC/TRAC OFF indicator light will come on.

If VSC and traction control turns OFF, the TRC/TRAC OFF indicator and VSC OFF indicator light will come on.

The VSC OFF indicator light is illuminated when the VSC and TRC/TRAC controls are prohibited by operating the VSC OFF switch (traction control switch).

By pressing the VSC OFF switch (traction control switch) for 3 seconds or more, the VSC OFF mode is activated, the VSC and TRC/TRAC controls are prohibited, and both the VSC OFF indicator light and the TRC/TRAC OFF indicator light in the combination meter are illuminated.

for Dot Display Type:

Pressing the VSC OFF switch (traction control switch) turns off traction control and pressing and holding this switch turns off traction and VSC controls. If traction control turns OFF, TRC OFF is displayed on the multi-information display.

If VSC and traction control turns OFF, TRC OFF is displayed on the multi-information display and the VSC OFF indicator light will come on.

The VSC OFF indicator light is illuminated when the VSC and TRC controls are prohibited by operating the VSC OFF switch (traction control switch).

By pressing the VSC OFF switch (traction control switch) for 3 seconds or more, the VSC OFF mode is activated, VSC and TRC controls are prohibited, the VSC OFF indicator light illuminates and TRC OFF is displayed on the multi-information display.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

PROCEDURE

1. CHECK IF SKID CONTROL ECU CONNECTOR IS SECURELY CONNECTED

   
   

   1. Check if the skid control ECU (brake actuator assembly) connector is securely connected.

      OK
      The connector is securely connected.

      Result
      Proceed to OK NG

   
   

   NG

   CONNECT CONNECTOR TO ECU CORRECTLY

   OK

2. CHECK CAN COMMUNICATION SYSTEM

   
   

   1. Check if CAN communication system DTCs are output.

      for LHD: Click here

      for RHD: Click here

      Result
      Proceed to DTC is not output DTC is output (for LHD) DTC is output (for RHD)

   
   

   DTC is output (for LHD)

   CHECK CAN COMMUNICATION SYSTEM Click here

   DTC is output (for RHD)

   CHECK CAN COMMUNICATION SYSTEM Click here

   DTC is not output

3. INSPECT BATTERY

   
   

   1. Check the battery voltage.

      Standard voltage
      11 to 14 V

      Result
      Proceed to OK NG (for 1AD-FTV) NG (for 2AD-FHV) NG (for 2AD-FTV) NG (for 2AR-FE) NG (for 3ZR-FAE) NG (for 3ZR-FE)

   
   

   NG (for 1AD-FTV)

   CHECK OR REPLACE CHARGING SYSTEM OR BATTERY Click here

   NG (for 2AD-FHV)

   CHECK OR REPLACE CHARGING SYSTEM OR BATTERY Click here

   NG (for 2AD-FTV)

   CHECK OR REPLACE CHARGING SYSTEM OR BATTERY Click here

   NG (for 2AR-FE)

   CHECK OR REPLACE CHARGING SYSTEM OR BATTERY Click here

   NG (for 3ZR-FAE)

   CHECK OR REPLACE CHARGING SYSTEM OR BATTERY Click here

   NG (for 3ZR-FE)

   CHECK OR REPLACE CHARGING SYSTEM OR BATTERY Click here

   OK

4. CHECK HARNESS AND CONNECTOR (CSW TERMINAL)

   
   

   1. Turn the ignition switch off.

   2. Disconnect the A64 skid control ECU (brake actuator assembly) connector.

   3. 

      *a	Front view of wire harness connector (to Skid Control ECU [Brake Actuator Assembly])

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition A64-30 (CSW) - Body ground VSC OFF switch held on Below 1 Ω A64-30 (CSW) - Body ground VSC OFF switch off (Not pressed) 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   INSPECT TRACTION CONTROL SWITCH Click here

   OK

5. READ VALUE USING GTS (TRC/VSC OFF MODE)

   
   

   1. Reconnect the A64 skid control ECU (brake actuator assembly) connector.

   2. Connect the GTS to the DLC3.

   3. Turn the ignition switch to ON.

   4. Turn the GTS on.

   5. Enter the following menus: Chassis / ABS/VSC/TRC / Data List.

   6. According to the display on the GTS, read the Data List.

      
      Chassis > ABS/VSC/TRC > Data List

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

      
      Chassis > ABS/VSC/TRC > Data List

      Tester Display
      TRC/VSC Off Mode

   7. Check that the mode display changes according to the VSC OFF switch (traction control switch) operation.

      OK
      Display changes according to the switch operation.

      Result
      Proceed to OK NG

   
   

   OK

   INSPECT METER / GAUGE SYSTEM Click here

   NG

   REPLACE BRAKE ACTUATOR ASSEMBLY Click here

6. INSPECT TRACTION CONTROL SWITCH

   
   

   1. Remove the VSC OFF switch (traction control switch).

      Click here

   2. Inspect the VSC OFF switch (traction control switch).

      Click here

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE TRACTION CONTROL SWITCH Click here

   OK

7. CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - TRACTION CONTROL SWITCH)

   
   

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

      Standard Resistance
      Tester Connection Condition Specified Condition A64-30 (CSW) - G51-6 (+) Always Below 1 Ω G51-3 (E) - Body ground Always Below 1 Ω A64-30 (CSW) or G51-6 (+) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   OK

   USE SIMULATION METHOD TO CHECK Click here

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR