Test Mode Procedure

1. Release the parking brake.
   NOTE: Before releasing the parking brake, move the shift lever to P for safety.

   HINT:

   When the parking brake is applied or the brake fluid level is low, the brake warning light comes on.

2. When the engine switch is turned on (IG), check that the ABS warning, brake warning, VSC warning, VSC OFF indicator, slip indicator and master caution indicator lights will come on for approximately 3 seconds.

   HINT:

   • If the skid control ECU stores any DTCs, the ABS warning, brake warning, VSC warning and slip indicator lights will come on.
   • If any of the indicators remain on or do not come on, proceed to troubleshooting for the light circuits listed below.
     TROUBLE AREA REFERENCE CHART
     
     

     Trouble Area	See Procedure
     ABS warning light circuit (Remains on)	ABS WARNING LIGHT REMAINS ON
     ABS warning light circuit (Does not come on)	ABS WARNING LIGHT DOES NOT COME ON
     Brake warning light circuit (Remains on)	BRAKE WARNING LIGHT REMAINS ON
     Brake warning light circuit (Does not come on)	BRAKE WARNING LIGHT DOES NOT COME ON
     VSC warning light circuit (Remains on)	VSC WARNING LIGHT REMAINS ON
     VSC warning light circuit (Does not come on)	VSC WARNING LIGHT DOES NOT COME ON
     VSC OFF indicator light circuit (Remains on)	VSC OFF INDICATOR LIGHT REMAINS ON
     VSC OFF indicator light circuit (Does not come on)	VSC OFF INDICATOR LIGHT DOES NOT COME ON
     Slip indicator light circuit (Remains on)	SLIP INDICATOR LIGHT REMAINS ON
     Slip indicator light circuit (Does not come on)	SLIP INDICATOR LIGHT DOES NOT COME ON

HINT:

• If the engine switch is turned from on (IG) to on (ACC) or off during Test Mode (signal check), DTCs recorded during the sensor check will be erased.
• During Test Mode (signal check), the skid control ECU records all DTCs detected in the sensor check. By performing Test Mode (signal check), the codes are erased if a normal condition is confirmed. The remaining codes are the codes where a malfunction was found.
  Fig 1: Identifying ABS Warning, Brake Warning, VSC Warning, VSC OFF Indicator, Slip Indicator And Master Caution Indicator Lights

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Procedure to enter Test Mode
   1. Turn the engine switch off.
   2. Check that the steering wheel is centered.
   3. Check that the shift lever is in P.
   4. Connect the Techstream to the DLC3.
   5. Turn the engine switch on (IG).
   6. Turn the Techstream on.
   7. Switch the skid control ECU to Test Mode using the Techstream. Enter the following menus: Chassis/ABS/VSC/TRAC/Utility/Signal Check.
   8. Check that the ABS warning and VSC warning lights come on for several seconds and then blink in Test Mode and the VSC test mode message is displayed on the multi-information display.
      Fig 2: Test Mode Blinking Pattern Chart

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      • Illustrations may differ from the actual screen displayed depending on the specifications of the vehicle and customized settings.
      • If the ABS warning and VSC warning lights do not blink and/or the VSC test mode message is not displayed on the multi-information display, inspect the TS and CG terminal circuit and ABS warning and VSC warning light circuits.
   9. Check the ABS sensors.

      HINT:

      Check that the ABS warning light is blinking in the Test Mode blinking pattern before performing the ABS sensor check.

2. Lost Booster Pressure Judgement Check and Master Cylinder Pressure Sensor Zero Point Calibration
   NOTE: Preform a check in the lost booster pressure state (vacuum in the booster is depressurized).