Test Mode Procedure

HINT:

• When the power switch is ON (READY), check that the ABS, brake, brake control warning lights and slip, VSC OFF indicator lights come on for approximately 3 seconds.
• If the warning light and indicator light check result is not normal, proceed to troubleshooting for the ABS, brake, brake control warning light circuits, and slip, VSC OFF indicator light circuits.
  Fig 1: Identifying ABS, Brake, VSC Warning, VSC OFF, Slip And Master Caution Indicator Lights

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

HINT:

• If the power switch is turned from ON (IG) to ON (ACC) or OFF during Test Mode (signal check), DTCs of the signal check function will be erased.
• During Test Mode (signal check), the skid control ECU records all DTCs of the signal check function. By performing the Test Mode (signal check), the codes are erased if normality is confirmed. The remaining codes are the codes where an abnormality was found.

1. Turn the power switch OFF.
2. Connect the Techstream to the DLC3.
3. Check that the steering wheel is centered and move the shift lever to the P position.
4. Turn the power switch ON (IG).
5. Set the Techstream to Test Mode (select "Signal Check").

   HINT:

   Refer to the Techstream operator's manual for further details.

6. Check that the ABS and brake control warning lights blink and VSC test mode message is indicated on the multi-information display (Test Mode).

   HINT:

   • If the ABS and brake control warning lights do not blink, inspect the TS and CG terminal circuit, ABS warning light circuit and/or brake control warning light (multi-information display) circuit.
   • Illustrations may differ from the actual screen displayed depending on the specifications of the vehicle and customized settings.
     Fig 2: Test Mode Blinking Pattern Chart

     Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
7. Check the ABS sensor.

   HINT:

   Make sure that the ABS warning light is blinking in Test Mode before performing the check.

   Fig 3: Test Mode Blinking Pattern Chart

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

The acceleration sensor check can be performed with the following master cylinder pressure sensor check.

HINT:

• Ensure that the ABS warning light comes on.
• While the ABS warning light stays on, continue to depress the brake pedal with a force of 98 N (10 kgf, 22 lbf) or more.
• The ABS warning light comes on for 3 seconds every time brake pedal operation above is performed.

1. Drive the vehicle in reverse for more than 1 second at the speed of 3 km/h (2 mph) or higher.

   HINT:

   Drive the vehicle in reverse and check the speed sensor signal. The signal check cannot be completed if the vehicle speed is 45 km/h (28 mph) or higher.

1. Drive the vehicle straight ahead.

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

   HINT:

   The signal check may not be completed if the vehicle has its wheels spun.

HINT:

When the signal 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. Check the VSC sensor.
   • Perform the check after checking that the brake control warning light blinks and that VSC test mode message is indicated on the multi-information display.
   • Illustrations may differ from the actual screen displayed depending on the specifications of the vehicle and customized settings.
   Fig 4: Test Mode Blinking Pattern Chart
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Keep the vehicle stationary on a level surface for 1 second or longer.

1. Move the shift lever from P to the D position and drive the vehicle at a speed of approximately 5 km/h (3 mph), turn the steering wheel either to the left or right 90° or more until the vehicle makes a 180° turn.
   Fig 5: Turning Vehicle Within 180° +/-5° Of Its Start Position

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Stop the vehicle and move the shift lever to the P position. Check that the skid control buzzer sounds for 3 seconds.

   HINT:

   • If the skid control buzzer sounds, the signal check is completed normally.
   • If the skid control buzzer does not sound, check the skid control buzzer circuit, then perform the signal check again.
   • If the skid control buzzer still does not sound, there may be a malfunction in the yaw rate sensor, so check the DTC.
   • At the end of the 180° turn, the direction of the vehicle should be within 180° +-5° of its start position.
   • Do not spin the wheels.
   • Do not turn the power switch OFF while turning.
   • Do not move the shift lever to the P position while turning, but change in the vehicle speed, stopping, or driving in reverse is possible.
   • Complete the turn within 20 seconds.