Inspection Procedure

1. Check the wireless door lock control functions 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 FLOWCHART 

A: Go to next step 

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

   Main body ECU: 

   TEST DETAILS
   
   

   Item	Test Details	Diagnostic Note
   Hazard	Turns FLSH relay ON / OFF	-

   OK: 

   Hazard warning lights are turned ON / OFF. 

OK: REPLACE INSTRUMENT PANEL JUNCTION BLOCK (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 INSTRUMENT PANEL JUNCTION BLOCK (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 body ECU, not into the buzzer itself.
   • When battery voltage is directly applied to the buzzer, the buzzer does not sound.

   Fig 1: Identifying Terminals 1 And 2 Of Buzzer

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE WIRELESS DOOR LOCK BUZZER 

OK: Go to next step 

1. Disconnect the A10 buzzer connector.
2. Disconnect the E17 ECU connector.
   Fig 2: Identifying A10 Buzzer And E17 ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   STANDARD RESISTANCE
   
   

   Tester Connection	Specified Condition
   A10-1 - E17-2 (BZR)	Below 1 Ω
   A10-2 - Body ground
   A10-1 or E17-2 (BZR) - Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: REPLACE INSTRUMENT PANEL JUNCTION BLOCK (MAIN BODY ECU)