No Answer-Back: Procedure

1. Check the wireless door lock control functions by operating the transmitter switch.
   RESULT:
   
   

   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 → See step   4 

C → Go to FLOWCHART  SYSTEM DIAGRAM 

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:
   
   

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

   OK

   Hazard warning lights are turned ON / OFF.

NG → See step   3 

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

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) 

Fig 1: Identifying Wireless Door Lock Buzzer Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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.

NG → REPLACE WIRELESS DOOR LOCK BUZZER 

OK: Go to next step 

Fig 2: Identifying Main Body ECU And Wireless Door Lock Buzzer Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the A10 buzzer connector.
2. Disconnect the E17 ECU connector.
3. Measure the resistance of the wire harness side connectors.

   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)