Inspection Procedure

1. Remove ABS H-fuse and ALT H-fuse from the FL block.
2. Measure the resistance according to the table below.

   Standard: Blow 1 Ω 

   Fig 1: Removing ABS H-Fuse & ALT H-Fuse From FL Block

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG : REPLACE FUSE 
2. OK : GO TO NEXT STEP. 

1. Disconnect the skid control ECU connector.
2. Measure the voltage according to the table below.

   Standard: 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   S1-31 (+BS) - Body ground	11 to 14 V

   Fig 2: Inspecting Skid Control ECU Connector (+BS Terminal Voltage)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG : REPAIR OR REPLACE HARNESS AND CONNECTOR (+BS CIRCUIT) 
2. OK : GO TO NEXT STEP. 

1. Disconnect the skid control ECU connector.
2. Measure the resistance according to the table below.

   Standard: 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   S1-32 (GND1) - Body ground	Below 1 Ω
   S1-1 (GND2) - Body ground	Below 1 Ω

   Fig 3: Inspecting Skid Control ECU Connector (GND Terminal Resistance)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG : REPAIR OR REPLACE HARNESS AND CONNECTOR (GND CIRCUIT) 
2. OK : GO TO NEXT STEP. 

HINT:

This DTC will be displayed when the internal malfunction of the brake actuator assy is detected. Therefore, perform the recurrence test before replacing the brake actuator assy to check that the DTC is displayed.

1. Clear the DTCs (see DTC CHECK/CLEAR  ).
2. Drive the vehicle at 6 km/h (4 mph) or more.
3. Is DTC output?

1. NO : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON  PROBLEM SYMPTOMS TABLE   ) 
2. YES : REPLACE BRAKE ACTUATOR ASSY (See  REPLACEMENT  )