Inspection Procedure

1. Remove the ABS MAIN3 fuse from the engine room relay block.
2. Measure the resistance of the fuse.

   Standard resistance: Below 1 Ω 

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

Fig 1: Inspecting Fuse (ABS MAIN3)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : GO TO NEXT STEP 

1. Measure the voltage of the connector.

   HINT:

   Measure the voltage from behind the connector with the connector connected.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   B18-8 (BC) - Body ground	10 to 14 V

NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 

Fig 2: Identifying Brake Control Power Supply B18 Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : GO TO NEXT STEP 

1. Measure the voltage of the connectors.

   HINT:

   Measure the voltage from behind the connector with the connector connected to the skid control ECU.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   S8-3 (+BI1) - Body ground	10 to 14 V
   S9-5 (+BI2) - Body ground	10 to 14 V

NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 

Fig 3: Checking Skid Control ECU (+BI1, +BI2 Voltage)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : GO TO NEXT STEP 

1. Measure the voltage of the connectors.

   HINT:

   Measure the voltage from behind the connector with the connector connected to the skid control ECU.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   S8-5 (+BO1) - Body ground	10 to 14 V
   S9-4 (+BO2) - Body ground	10 to 14 V

NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 

Fig 4: Checking Skid Control ECU (+BO1, +BO2 Voltage)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : GO TO NEXT STEP 

1. Measure the voltage of the connector.

   HINT:

   Measure the voltage from behind the connector with the connector connected.

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   B18-1 (OUT) - Body ground	Power switch ON (READY)	9 to 13 V
   B18-2 (BCTY) - Body ground	Power switch ON (READY)	9 to 13 V
   B18-7 (OUT2) - Body ground	Power switch ON (READY)	9 to 13 V

NG : REPLACE BRAKE CONTROL POWER SUPPLY 

Fig 5: Checking Brake Control Power Supply (OUT1, BCTY, OUT2 Voltage)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : REPAIR OR REPLACE HARNESS AND CONNECTOR