Inspection Procedure

Fig 1: Inspecting Brake Actuator

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the B1 and B3 actuator connectors.
2. Measure the resistance of the actuator.

   HINT:

   Resistance of each solenoid at 20°C (68°F).

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   B1-4 (BS) - B3-1 (SRRR)	2.00 to 2.40 Ω
   B1-4 (BS) - B3-2 (SRRH)	4.75 to 5.25 Ω
   B1-4 (BS) - B3-3 (SRLR)	2.00 to 2.40 Ω
   B1-4 (BS) - B3-4 (SRLH)	4.75 to 5.25 Ω
   B1-4 (BS) - B3-5 (SA3)	4.75 to 5.25 Ω
   B1-4 (BS) - B3-6 (STR)	3.50 to 3.90 Ω
   B1-4 (BS) - B3-7 (SFLR)	2.00 to 2.40 Ω
   B1-4 (BS) - B3-8 (SFLH)	4.75 to 5.25 Ω
   B1-4 (BS) - B3-9 (SFRR)	2.00 to 2.40 Ω
   B1-4 (BS) - B3-10 (SFRH)	4.75 to 5.25 Ω
   B1-4 (BS) - B3-11 (SA2)	3.50 to 3.90 Ω
   B1-4 (BS) - B3-12 (SA1)	3.50 to 3.90 Ω

NG: REPLACE BRAKE ACTUATOR 

OK: Go to Next Step 

Fig 2: Identifying Wire Harness (Skid Control ECU - Brake Actuator)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the S5 and S8 ECU connectors.
2. Disconnect the B3 actuator connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   S5-1 (SRLR) - B3-3 (SRLR)	Below 1 Ω
   S5-4 (SFRH) - B3-10 (SFRH)	Below 1 Ω
   S5-5 (SRLH) - B3-4 (SRLH)	Below 1 Ω
   S5-8 (SFRR) - B3-9 (SFRR)	Below 1 Ω
   S8-2 (SA1) - B3-12 (SA1)	Below 1 Ω
   S8-3 (SA2) - B3-11 (SA2)	Below 1 Ω
   S8-4 (SA3) - B3-5 (SA3)	Below 1 Ω
   S8-5 (STR) - B3-6 (STR)	Below 1 Ω
   S8-7 (SFLR) - B3-7 (SFLR)	Below 1 Ω
   S8-8 (SRRH) - B3-2 (SRRH)	Below 1 Ω
   S8-9 (SRRR) - B3-1 (SRRR)	Below 1 Ω
   S8-21 (SFLH) - B3-8 (SFLH)	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: CHECK EACH CONNECTION IF SAME CODE IS STILL OUTPUT AFTER DTC DELETION (IF CONNECTION IS NORMAL, SKID CONTROL ECU MAY BE DEFECTIVE)