Test Mode Procedure

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

   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, brake warning, VSC OFF indicator and SLIP indicator lights come on for approximately 3 seconds.

   HINT:

   • If the skid control ECU stores any DTCs, the ABS warning, SLIP indicator and VSC OFF indicator lights will come on.
   • If the indicator remains on or does not come on, proceed to troubleshooting for the light circuits listed below.
     Fig 1: ABS Warning Light And Brake Warning Light Chart

     Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
     DIAGNOSTIC PROCEDURE 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 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 ignition switch is turned from ON to ACC or OFF during Test Mode (signal check), DTCs recorded during 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 a normal condition is confirmed. The remaining codes are the codes where an abnormality was found.

1. Procedure to enter Test Mode.
   1. Turn the ignition switch to OFF.
   2. Check that the steering wheel is in the straight-ahead position.
   3. Check that the shift lever is in the P position (for automatic transaxle model) or the parking brake is applied (for manual transaxle model).
   4. Connect the Techstream to the DLC3.
   5. Turn the ignition switch to ON.
   6. Turn the Techstream on.
   7. Enter the following menu items: Chassis / ABS/ VSC/TRAC / Signal Check.
   8. Check that the ABS warning and VSC OFF indicator lights come on for several seconds and then blink in Test Mode.

      HINT:

      • The SLIP indicator light remains on during Test Mode because traction control is prohibited (The SLIP indicator light goes off when the VSC OFF switch is ON).
      • If the ABS warning and VSC OFF indicator lights do not blink, inspect the TS and CG terminal circuit and ABS warning and VSC OFF indicator light circuits.
        Fig 2: Identifying ABS Warning Light Blinking Pattern

        Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        DIAGNOSTIC PROCEDURE 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
        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

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

   HINT:

   Acceleration sensor check can be performed with the master cylinder pressure sensor check below.

1. Leave the vehicle in a stationary condition and release the brake pedal for 1 second or more, and quickly and continuously depress the brake pedal with a force of 98 N (10 kgf, 22 lbf) or more for 1 second.
2. Check that the ABS warning light stays on for 3 seconds.

   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 the brake pedal operation above is performed.
   • If the check of the master cylinder pressure sensor is not completed, depressing the brake pedal causes further decrease in the negative pressure, making the sensor check difficult to complete.
   • If the negative pressure is insufficient, the master cylinder pressure sensor check may not be completed. In this case, run the engine at idle to obtain sufficient negative pressure.
   • If the brake pedal is strongly depressed when the negative pressure is insufficient, the brake warning light may come on in accordance with the booster pressure control. In this case, run the engine at idle to obtain sufficient negative pressure.

1. Check the speed sensor signal.
   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.

      • The sensor check may not be completed if wheelspin 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.
   Fig 3: Identifying ABS Warning Light Blinking Pattern

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002