Operation Check

HINT:

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

1. Release the parking brake lever.
2. Check that the ABS warning light and BRAKE warning light comes on when the ignition switch is turned on and will go off in about 3 seconds.
3. If the warning lights do not light, or remain on, the bulb has burned out or the ABS ECU may be defective.

Fig 1: Checking Warning Lamp Bulb

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(USING HAND-HELD TESTER) 

If the ignition switch is turned from the ON to the ACC or LOCK position during SIGNAL CHECK (test mode), DTC of sensor check function will be erased.

1. Procedures for sensor signal check
   1. Turn the ignition switch off.
   2. Check that the shift lever is in P position.
      Fig 2: Identifying Sensor Signal Check (Test Mode)

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   3. Connect the hand-held tester to the DLC3.
   4. Start the engine.
   5. Operate the hand-held tester in SIGNAL CHECK (test mode).
   6. Check that the ABS warning light blinks.

   HINT:

   If the ABS warning light does not blink, inspect the ABS warning light circuit.

   TROUBLE AREA AND ACTION
   
   

   Trouble area	Action
   ABS warning light	INSPECTION PROCEDURE

   Fig 3: Connecting Hand-Held Tester To DLC3

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2. Start the sensor signal check.
   1. Drive vehicle straight forward.

      Drive the vehicle at a speed of 28 to 34 mph (45 to 55 km/h) or higher for several seconds.

      SENSOR SIGNAL CHECK REFERENCE
      
      

      Test	Vehicle Speed	Check
      Low speed test	0 to 3 mph (0 to 5 km/h)	Response of sensors
      Middle speed test	28 to 34 mph (45 to 55 km/h)	Deviations of sensor signal

      HINT:

      The sensor check may not be completed if the vehicle has its wheel spun or its steering wheel steered during this check.

   2. Stop the vehicle.
3. Signal check results.
   SIGNAL CHECK RESULTS REFERENCE
   
   

   Check Result	ABS Warning Lamp
   OK	Goes off
   NG	Remains on

4. Read the DTCs.

   HINT:

   • If the check result is OK, the ABS warning light blink goes off when the brake pedal is once depressed.
   • See the list of DTC (Refer to step  3).
   • If every sensor is normal, there is a normal system code output. (A cycle of 0.25 sec. ON and 0.25 sec. OFF is repeated.)
   • If 2 or more malfunctions are indicated at the same time, the lowest numbered code will be displayed 1st.
   Fig 4: Identifying Normal System Code Output

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002