Inspection Procedure

HINT:

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

1. PERFORM ACTIVE TEST BY HAND-HELD TESTER (ABS MOTOR RELAY) 
   1. Connect the hand-held tester to the DLC3.
   2. Start the engine.
   3. Select the ACTIVE TEST mode on the hand-held tester.
      ACTIVE TEST - REFERENCE TABLE
      
      

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

   4. Check the operation sound of the ABS motor individually when operating it with the hand-held tester.

   Standard: 

   The operation sound of the ABS motor should be heard. 

   NG: Go to step 2 

   OK: REPLACE BRAKE ACTUATOR ASSY (See  REPLACEMENT  ) 

2. INSPECT FUSE (ABS NO. 1 FUSE) 
   1. Remove the ABS No. 1 fuse from the engine room R/B.
   2. Measure the resistance according to the value(s) in the table below.
   Fig 1: Identifying ABS No. 1 Fuse
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard: 

   ABS NO. 1 FUSE - RESISTANCE TABLE
   
   

   ABS No. 1 fuse

   1 Ω or less

   NG: CHECK FOR SHORT IN ALL HARNESS AND CONNECTOR CONNECTED TO FUSE AND REPLACE FUSE 

   OK: Go to next step 

3. INSPECT SKID CONTROL ECU CONNECTOR (+BM TERMINAL VOLTAGE) 
   1. Disconnect the skid control ECU connector.
   2. Turn the ignition switch to the ON position.
   3. Measure the voltage according to the value(s) in the table below.
   Fig 2: Identifying Skid Control ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard: 

   SKID CONTROL ECU - VOLTAGE TABLE
   
   

   Tester Connection	Specified Condition
   S1-2 (+BM) - S1-4 (GND1)	10 to 14 V
   S1-2 (+BM) - S1-1 (GND2)	10 to 14 V

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to next step 

4. INSPECT SKID CONTROL ECU CONNECTOR (GND1 AND GND2 TERMINAL) 
   1. Disconnect the skid control ECU connector.
   2. Measure the resistance according to the value(s) in the table below.
   Fig 3: Identifying Skid Control ECU Connector Terminals
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard: 

   SKID CONTROL ECU - RESISTANCE TABLE
   
   

   Tester Connection	Specified Condition
   S1-4 (GND1) - Body ground	1 Ω or less
   S1-1 (GND2) - Body ground	1 Ω or less

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to next step 

5. RECONFIRM DTC 
   1. Clear the DTCs (See PRE-CHECK ).
   2. Drive the vehicle at a speed of 4 mph (6 km/h) or more.
   3. Are the same DTCs recorded? (See PRE-CHECK ).

   NO: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  

   YES: REPLACE BRAKE ACTUATOR ASSY (See  REPLACEMENT  )