Inspection Procedure

1. Check the wireless door lock control function by operating the transmitter switch.

   Result: 

   RESULT REFERENCE
   
   

   Result	Proceed to
   Wireless door lock functions are normal but hazard warning lights answer-back does not occur	A
   Wireless door lock functions are normal but wireless door lock buzzer answer-back does not occur	B
   Doors cannot be locked and unlocked with transmitter	C

B : Go to step   4 

C : GO TO PROBLEM SYMPTOMS TABLE 

A : Go to next step 

1. Select the ACTIVE TEST, use the intelligent tester to generate a control command, and then check that the hazard warning lights flash.

   Main body ECU: 

   MAIN BODY ECU ACTIVE TEST
   
   

   Item	Test Details	Diagnostic Note
   HAZARD	Turn signal flasher relay ON / OFF	-

   OK : Turn signal flasher relay turns ON / OFF. 

OK : REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY (MAIN BODY ECU) 

NG : GO TO NEXT STEP 

1. Check that the hazard warning lights flash continuously when the hazard warning signal switch is pressed.

   OK : Hazard warning lights flash continuously. 

NG : GO TO LIGHTING SYSTEM 

OK : REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY (MAIN BODY ECU) 

1. Measure the resistance between terminals 1 and 2 of the buzzer.

   Standard resistance: Approximately 1 kΩ 

   NOTE:

   • The buzzer circuit is built into the main body ECU, not into the buzzer itself.
   • When battery voltage is directly applied to the buzzer, the buzzer does not sound.

NG : REPLACE WIRELESS DOOR LOCK BUZZER 

Fig 1: Identifying Wireless Door Lock Buzzer Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : GO TO NEXT STEP 

1. Disconnect the W6 buzzer connector.
2. Disconnect the B6 ECU connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   W6-1 - B6-13 (BUZ)	Below 1 Ω
   W6-2 - Body ground
   W6-1 - Body ground	10 kΩ or higher

NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 

Fig 2: Identifying Wireless Door Lock Buzzer - Main Body ECU Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY (MAIN BODY ECU)