Test Mode Procedure

1. Release the parking brake.
   NOTE: Before releasing the parking brake, move the shift lever to P (for automatic transaxle) or set chocks to hold the vehicle for safety (for manual transaxle).

   HINT:

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

2. When the ignition switch is turned to ON, check that the ABS warning and brake warning lights come on for approximately 3 seconds.

   HINT:

   • If the skid control ECU stores any DTCs, the ABS warning and brake warning lights will come on.
   • If the indicator remains on or does not come on, proceed to troubleshooting for the light circuits listed below.
     TROUBLESHOOTING 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

     Fig 1: Identifying ABS And Brake Warning Light Indicator

     Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

• If the ignition switch is turned from ON to ACC or off during Test Mode (signal check), DTCs recorded during the sensor check will be cleared.
• During Test Mode (signal check), the skid control ECU records all DTCs of the sensor check function. By performing Test Mode (signal check), the codes are cleared if a normal condition is confirmed. The remaining codes are the codes where a malfunction was found.

1. Procedure to enter Test Mode.
   1. Turn the ignition switch off.
   2. Check that the steering wheel is centered.
   3. Check that the shift lever is in P (for automatic transaxle) or the parking brake is applied (for manual transaxle).
   4. Connect the Techstream to the DLC3.
   5. Turn the ignition switch to ON.
   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 light comes on for several seconds and then blinks in Test Mode.

      HINT:

      If the ABS warning light does not blink, inspect the TS and CG terminal circuit and ABS warning light circuit.

      Fig 2: ABS And VSC OFF Indicator Light Test Mode Blinking Pattern

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TROUBLESHOOTING REFERENCE CHART
      
      

      Trouble Area	See Procedure
      TS and CG terminal circuit	TS AND CG TERMINAL CIRCUIT
      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

   9. Check the ABS sensors.

      HINT:

      Check that the ABS warning light is blinking in Test Mode and perform the check.

1. Keep the vehicle stationary on a level surface for 1 second or more.
   Fig 3: ABS And VSC OFF Indicator Light Test Mode Blinking Pattern

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Drive the vehicle straight-ahead.

   Accelerate the vehicle to a speed of 45 km/h (28 mph) or more for several seconds and check that the ABS warning light goes off.

   HINT:

   • The sensor check may not be completed if wheel spin occurs.
   • The ABS warning light blinks when the sensor check has been completed and the brake pedal is depressed.
   • The ABS warning light comes on immediately after a malfunction has been detected during the speed sensor check.
2. Stop the vehicle.
   NOTE:

   • Before performing the speed sensor check, complete the deceleration sensor check (for 4WD).
   • The speed sensor check may not be completed if the speed sensor check is started while turning the steering wheel or spinning the wheels.
   • After the ABS warning light goes off, if the vehicle speed exceeds 80 km/h (50 mph), a sensor check code will be stored again. Decelerate or stop the vehicle before the speed reaches 80 km/h (50 mph).
   • If the sensor check has not been completed, the ABS warning light will blink while driving and the ABS will not operate.

   HINT:

   When the sensor check has been completed, the ABS warning light goes off while driving and blinks in the Test Mode pattern while the vehicle is stationary.

1. If the sensor check is completed, the ABS warning light blinks (Test Mode) when the vehicle stops and the ABS warning light is off while the vehicle is driving.
   Fig 4: ABS And VSC OFF Indicator Light Test Mode Blinking Pattern

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002