Test Mode Procedure

HINT:

• When the ignition switch is on, check that the ABS, BRAKE, brake control warning lights and SLIP indicator light 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 indicator light circuit.

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

  Fig 1: Identifying Warning Lights

  Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
  SYSTEM NAME PAGE REFERENCE CHART
  
  

  Trouble Area	See procedure
  ABS warning light circuit	ABS WARNING LIGHT REMAINS ON  or ABS WARNING LIGHT DOES NOT COME ON
  BRAKE warning light circuit	BRAKE WARNING LIGHT REMAINS ON  or BRAKE WARNING LIGHT DOES NOT COME ON
  Brake control warning light circuit	BRAKE CONTROL WARNING LIGHT REMAINS ON  or BRAKE CONTROL WARNING LIGHT DOES NOT COME ON
  SLIP indicator light circuit	SLIP INDICATOR LIGHT REMAINS ON  or SLIP INDICATOR LIGHT DOES NOT COME ON

HINT:

• If the ignition switch is turned from the ON position to the 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 ignition switch off.
2. Connect the intelligent tester to the DLC3.
Fig 2: Connecting Intelligent Tester To DLC3
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
3. Check that the steering wheel is in the straight-ahead position and move the shift lever to the P position.
4. Turn the ignition switch on.
5. Set the intelligent tester to test mode (select "SIGNAL CHECK").

   HINT:

   Refer to the intelligent tester operator's manual for further details.

   Fig 3: Intelligent Tester Display - SIGNAL CHECK

   Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
6. Check that the ABS and warning lights blink and "CHECK VSC SYSTEM" is displayed on the multi information display (test mode).

   HINT:

   If the ABS and brake control warning light do not blink, inspect the TS and CG terminal circuit, ABS warning light circuit and/or brake control warning light circuit.

   Fig 4: Blinking Pattern - ABS And Brake Control Warning Lights

   Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
7. ABS SENSOR CHECK

   HINT:

   Check that the ABS warning light is blinking in test mode and perform the check.

   Fig 5: Blinking Pattern - Test Mode

   Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

HINT:

Deceleration 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 2 mph (3 km/h) or higher.

   HINT:

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

1. Drive the vehicle straight forward.

   Drive the vehicle at a speed of 28 mph (45 km/h) 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 or the steering wheel turned during this check.

HINT:

When the signal check has been completed, the ABS warning light goes off while driving and blinks in the test mode pattern while stationary.

1. VSC SENSOR CHECK

   Check that the brake warning light blinks and "CHECK VSC SYSTEM" is displayed on the multi information display, and perform the check (refer to step 6).

1. Keep the vehicle in a stationary condition on a level surface for 1 second or more.
   Fig 6: Blinking Pattern - ABS And Brake Control Warning Lights

   Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

1. Move the shift lever to the D position, drive the vehicle at a speed of approximately 3 mph (5 km/h), and turn the steering wheel either to the left or right 90° or more until the vehicle makes a 180° turn.
2. Stop the vehicle and move the shift lever to the P position. Check that the skid control buzzer sounds for 3 seconds.

Fig 7: Identifying Vehicle Start And Stop Position

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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 does not sound yet, there is a malfunction in the yaw rate sensor, so check the DTC.
• Make 180° turn. At the end of the turn, the direction of the vehicle should be within 180° +- 5° of its start position.
• Do not spin the wheels.
• Do not turn the ignition 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.