Inspection Procedure

HINT:

Start the inspection from step  1 when using the hand-held tester and start from  2 when not using the hand-held tester.

1. Check operation of VSC warning buzzer. 

   PREPARATION: 

   1. Connect the hand-held tester to the DLC3.
   2. Turn the ignition switch ON and push the hand-held tester main switch ON.
   3. Select the ACTIVE TEST mode on the hand-held tester.

   CHECK: 

   Check "ON-OFF" function of the VSC warning buzzer using the hand-held tester.

   OK: 

   The VSC warning buzzer operates according to the tester instruction. 

   1. OK: Replace brake actuator assembly. 
      NOTE: When replacing the brake actuator assembly, perform the zero point calibration (see PRE-CHECK ).
   2. NG: Go To Next Step 
2. Measure voltage between terminal 2 of VSC warning buzzer and body ground. 

   PREPARATION: 

   Remove the VSC warning buzzer with the connectors being connected.

   CHECK: 

   1. Turn the ignition switch ON.
   2. Measure the voltage between terminal 2 of the VSC warning buzzer and the body ground.

   OK: 

   Voltage: 10 to 14 V 

   1. NG: Repair or replace harness and connector from voltage supply to VSC warning buzzer. 
   2. OK: Go To Next Step 
3. Check VSC warning buzzer. 

   PREPARATION: 

   Disconnect the VSC warning buzzer connector.

   CHECK: 

   Apply battery positive voltage to terminals 1 and 2 of the VSC buzzer connector and check that the VSC warning buzzer sounds.

   Fig 1: Checking VSC Warning Buzzer

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG: Replace VSC warning buzzer. 
   2. OK: Go To Next Step 
4. Check for open and short circuit in harness and connector between skid control ECU and VSC warning buzzer (See  HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE  ). 
   1. NG: Repair or replace harness and connector. 
   2. OK: Replace brake actuator assembly. 
   NOTE: When replacing the brake actuator assembly, perform the zero point calibration (see PRE-CHECK ).