Inspection Procedure

1. Disconnect the skid control ECU connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard: 

   TESTER CONNECTION SPECIFIED CONDITION (1 OF 3)
   
   

   Tester Connection	Specified Condition
   S1-3 (+BS) - S1 -4 (GND1)	10 to 14 V
   S1-3 (+BS) - S1 - 1 (GND2)	10 to 14 V

   Fig 1: Inspecting Skid Control ECU Connector (+BS Terminal Voltage)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. OK: Go to step   4 

NG: Go to Next Step. 

1. Remove the ABS No.3 fuse from the engine room J/B.
2. Measure the resistance according to the value(s) in the table below.

   Standard: 

   TESTER CONNECTION SPECIFIED CONDITION (2 OF 3)
   
   

   ABS No.3 fuse

   1 Ω or less

   Fig 2: Removing ABS No.3 Fuse From Engine Room J/B

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

OK: Go to Next Step. 

1. Disconnect the skid control ECU connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard: 

   TESTER CONNECTION SPECIFIED CONDITION (3 OF 3)
   
   

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

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: CHECK AND REPAIR HARNESS AND CONNECTOR 

OK: Go to Next Step. 

1. Clear the DTCs (See PRE-CHECK  ).
2. Turn the ignition switch to the ON position.
3. Are the same DTCs recorded? (See PRE-CHECK  ).

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: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE   ) 

YES: REPLACE BRAKE ACTUATOR ASSY (See  REPLACEMENT  )