Inspection Procedure

HINT:

Start the inspection from step 1 when using the hand-held tester and start from step  2 when not using hand-held tester.

1. PERFORM ACTIVE TEST BY HAND-HELD TESTER 
   1. Connet the hand-held tester to the DLC3.
   2. Turn the ignition switch to the ON position.
   3. Select the ACTIVE TEST mode on the hand-held tester.
   4. Check the operation sound of the ABS pump motor when operating it with the hand-held tester.
      ABS PUMP MOTOR
      
      

      Item	Vehicle Condition/Test Details	Diagnostic Note
      ABS MOT RELAY	Turns ABS motor relay ON/OFF	Operation sound of motor can be heard

      OK: The operation sound of the ABS motor should be heard. 

   1. NG: Go to step 2 
   2. OK: REPLACE BRAKE ACTUATOR ASSY (SEE  REPLACEMENT  ) 
2. INSPECT SKID CONTROL ECU CONNECTOR (GND TERMINAL) 
   1. Disconnect the skid control ECU connector.
   2. Measure the resistance according to the value(s) in SKID CONTROL ECU CONNECTOR TERMINALS RESISTANCE  .

      Standard: 

      SKID CONTROL ECU CONNECTOR TERMINALS RESISTANCE
      
      

      Tester Connection	Specified Condition
      S1-32 (GND2) - Body ground	Below 1 Ω

      Fig 1: Inspecting Skid Control ECU Connector (GND Terminal)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR(GND CIRCUIT) 
   2. OK: GO TO NEXT STEP. 
3. RECONFIRM DTC 
   1. Clear the DTCs (see DTC CHECK/CLEAR ).
   2. Drive the vehicle at a speed of 4 mph (6 km/h) or more.
   3. Are the same DTCs recorded?

      HINT:

      The skid control ECU inspects the motor relay circuit when the stop lamp switch is turned off and the vehicle is running at a speed of 4 mph (6 km/h) or more.

   1. NO: END 

      HINT:

      This DTC may be memorized due to a malfunction in the connector terminal connection, etc.

   2. YES: REPLACE BRAKE ACTUATOR ASSY (SEE  REPLACEMENT  )