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 using transmitter	C

B → See step   4 

C → See step   7 

A: 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 → See step   8 

OK: Go to next step 

1. Enter Active Test using the Techstream to generate a control command, and then check that the hazard warning lights flash.
   MAIN BODY ECU
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Hazard	Turn Signal Flasher	ON/OFF	Observe headlight and rear combination light for correct operation

   OK

   Hazard warning lights are turned ON/OFF.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE MAIN BODY ECU 

1. Enter Active Test using the Techstream to generate a control command, and then check that the wireless buzzer operates normally.
   MAIN BODY ECU
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Wireless Buzzer	Wireless Door Lock Buzzer	ON/OFF	-

   OK

   Wireless buzzer turns ON/OFF.

NG → See step   5 

OK → REPLACE MAIN BODY ECU 

Fig 1: Identifying Wireless Door Lock Buzzer Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   1 - 2	Always	950 to 1050 Ω

   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 → See step   9 

OK: Go to next step 

Fig 2: Identifying A30 Wireless Door Lock Buzzer And E63 Main Body ECU Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the A30 wireless door lock buzzer connector.
2. Disconnect the E63 main body ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A30-1 - E63-15 (BZR)	Always	Below 1 Ω
   A30-2 - Body ground	Always
   A30-1 or E63-15 (BZR) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE MAIN BODY ECU