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 PROBLEM SYMPTOMS TABLE 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch ON.
3. Turn the tester ON.
4. Enter the following menus: Body Electrical / Main Body / Active Test.
5. Perform the Active Test according to the display on the Techstream.
   1. Main Body 
      ACTIVE TEST DETAIL - MAIN BODY
      
      

      Tester Display	Test Part	Control Range	Diagnostic Note
      Hazard	Flasher relay	ON or OFF	-

      OK: 

      Hazard warning lights are turned ON/OFF. 

NG: Go to step 3 

OK : REPLACE 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 MAIN BODY ECU 

1. Select the Active Test, use the Techstream to generate a control command, and then check that the wireless buzzer operate normally.
   1. Main body 
      ACTIVE TEST DETAIL - MAIN BODY
      
      

      Tester Display	Test Part	Control Range	Diagnostic Note
      Wireless Buzzer	Sounds wireless buzzer	ON or OFF	-

      OK: 

      Wireless buzzer turns ON/OFF. 

NG: Go to step 5 

OK : REPLACE MAIN BODY ECU 

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

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   1 - 2	Always	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.
   Fig 1: Identifying Wireless Door Lock Buzzer Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPLACE WIRELESS DOOR LOCK BUZZER  (See REMOVAL  )

OK: Go to next step 

1. Disconnect the A29 wireless door lock buzzer connector.
2. Disconnect the C45 main body ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   A29-1 -C45-15 (BZR)	Always	Below 1 Ω
   A29-2 - Body ground	Always
   A29-1 or C45-15 (BZR) - Body ground	Always	10 kΩ or higher

Fig 2: Identifying Wireless Door Lock Buzzer And Main Body ECU Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK : REPLACE MAIN BODY ECU