Inspection Procedure

1. Choose the diagnosis method.

   Method 

   METHOD REFERENCE
   
   

   Method	Proceed to
   Using intelligent tester	A
   Not using intelligent tester	B

B: Go to step   3 

A: Go to next step 

1. Select the ACTIVE TEST, generate a control command, and then check that the skid control buzzer sounds.

   Skid control ECU with actuator 

   ITEM VEHICLE CONDITION DIAGNOSTIC CHART
   
   

   Item	Vehicle Condition / Test Details	Diagnostic Note
   VSC / BR WARN BUZ	Turns VSC / BRAKE warning buzzer ON / OFF	Buzzer can be heard

   OK: Normal operation. 

   HINT:

   When replacing the skid control ECU with actuator, perform the zero point calibration (see CALIBRATION  ).

OK: REPLACE BRAKE ACTUATOR ASEMBLY 

NG: Go to Next Step 

1. Disconnect the skid control buzzer connector.
2. Apply positive (+) battery voltage to terminals 1 and 2 of the skid control buzzer connector. Check that the buzzer sounds.

   OK: Skid control buzzer sound is heard. 

NG: REPLACE SKID CONTROL BUZZER ASSEMBLY 

Fig 1: Inspecting Skid Control Buzzer Assembly

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step 

1. Disconnect the V2 buzzer connector.
2. Disconnect the S3 ECU connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   V2-1 - S3-30 (BZ)	Below 1 Ω

4. Measure the voltage of the wire harness side connectors.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   V2-2 - Body ground	10 to 14 V

   HINT:

   When replacing the skid control ECU with actuator, perform the zero point calibration (see CALIBRATION  ).

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

Fig 2: Measuring Resistance Of Wire Harness Side Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE BRAKE ACTUATOR ASSEMBLY