Test Mode Procedure

1. Release the parking brake pedal.
   NOTE: When releasing the parking brake, move the "P" position switch into the P position to hold the vehicle for safety.

   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 power switch ON (READY) check that the ABS warning light, VSC warning light, BRAKE warning light, Brake Control warning light and SLIP indicator light come on for approximately 3 seconds.

HINT:

If the indicator check result is not normal, proceed to troubleshooting for the ABS warning light circuit, VSC warning light circuit, BRAKE warning light circuit, Brake Control warning light circuit or SLIP indicator light circuit.

If the indicator remains on, proceed to troubleshooting for the light circuit below.

Fig 1: Checking Warning Light And Indicator Light

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

• Set the vehicle in the TEST MODE and perform the following procedures to check operation of the deceleration sensor, master cylinder pressure sensor, speed sensor and yaw rate sensor.
• Check results are indicated by DTCs output only in the TEST MODE.
• Perform the following procedures (a) to (e) as a set.
• When entering the test mode, the skid control ECU once records all the test mode codes and clears the codes judged to be normal.
• The Enhanced VSC function does not operate independent of whether the sensor check is normal or abnormal during test mode.
• When the mode returns to the normal mode, all the test mode codes are cleared.
• The ABS warning lamp and VSC warning light comes on if the sensor has a malfunction.

1. PROCEDURES FOR TEST MODE
   1. Turn the power switch OFF.
   2. Connect the hand-held tester to the DLC3.
   3. Check that the steering wheel is in the straight-ahead position and move the shift lever to the P position.
   4. Turn the power switch ON (READY).
      Fig 2: Connecting Hand-held Tester DLC3 For Test Mode

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   5. Select the SIGNAL CHECK following the handheld tester screen.
   6. Check that the ABS warning light and VSC warning light indicates TEST MODE.

      HINT:

      If the ABS warning light and VSC warning light do not blink, inspect the ABS warning light circuit and VSC warning light circuit.

      ABSR VSC WARNING LIGHT CIRCUIT TROUBLESHOOTING REFERENCE
      
      

      Trouble area	Go To
      ABS warning light circuit	ABS WARNING LIGHT CIRCUIT (REMAINS ON)
      VSC warning light circuit	VSC WARNING LIGHT CIRCUIT (REMAINS ON)

      Fig 3: Test Mode Signals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   7. Start the engine.
2. DECELERATION SENSOR CHECK
   1. Check that the ABS warning light is blinking in TEST MODE.
   2. Keep the vehicle in the stationary condition on a level surface for 1 second or more.

   HINT:

   The blinking pattern of the ABS warning light and VSC warning light do not change. When the sensor is normal and in the test mode, if the above conditions are met, the check is completed.

3. YAW RATE SENSOR CHECK
   1. Shift the shift lever to the D range and drive the vehicle at the vehicle speed of approx. 3 mph (5 km h), turn the steering wheel either to left or right 90° or more, and maintain 180° Circular drive for the vehicle.
      NOTE:

      • The vehicle direction at the beginning and the end should be 180 +/- 5 degrees or less.
      • While turning do not move the shift lever to the P position. Do not turn the ignition switch off.