No Answer-Back: Procedure

1. Using the Techstream, read the Data List. Refer to DATA LIST / ACTIVE TEST .
   DRIVER DOOR
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Lock position switch	Driver side door lock position switch signal / ON or OFF	ON: Driver side door lock is unlocked OFF: Driver side door lock is locked	-

   PASSENGER DOOR
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Lock position switch	Passenger side door lock position switch signal / ON or OFF	ON: Passenger side door is unlocked OFF: Passenger side door is locked	-

   REAR LEFT DOOR
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Lock position switch	Rear door LH lock position switch signal / ON or OFF	ON: Rear door LH is unlocked OFF: Rear door LH is locked	-

   REAR RIGHT DOOR
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Lock position switch	Rear door RH lock position switch signal / ON or OFF	ON: Rear door RH is unlocked OFF: Rear door RH is locked	-

   OK

   On the Techstream screen, item changes between ON and OFF according to above chart.

   RESULT
   
   

   Result	Proceed to
   OK	A
   NG (for Front LH Side)	B
   NG (for Front RH Side)	C
   NG (for Rear LH Side)	D
   NG (for Rear RH Side)	E

E → See step   16 

D → See step   15 

C → See step   14 

B → See step   13 

A: Go to next step 

1. Check that the wireless door lock control functions operate with a transmitter. Refer to OPERATION CHECK .
   RESULT
   
   

   Result	Proceed to
   Wireless door lock control functions operate normally but turn signal light answer-back does not occur	A
   Wireless door lock control functions operate normally but wireless door lock buzzer answer-back does not occur	B
   Wireless door lock control functions do not operate	C

C → See step   9 

B → See step   4 

A: Go to next step 

1. Check that the turn signal lights flash continuously when the hazard warning signal switch is pressed. Refer to OPERATION CHECK .

   OK

   Hazard warning lights flash continuously.

NG → See step   10 

OK → REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK) 

Fig 1: Identifying L16 ECU Connector And L30 Controller Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the L16 ECU connector.
2. Disconnect the L30 controller connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   L16-18 (BZR3) - L30-1 (B)	Always	Below 1 Ω
   L16-19 (BZRG) - L30-2 (L)
   L16-18 (BZR3) or L30-1 (B) - Body ground	Always	10 kΩ or higher
   L16-19 (BZRG) or L30-2 (L) - Body ground

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

Fig 2: Wireless Door Lock Buzzer Controller Switch Position

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the buzzer controller. Refer to REMOVAL .
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Switch Condition	Specified Condition
   1 - 2	ON → OFF	Below 1 Ω → 10 kΩ or higher

NG → See step   11 

OK: Go to next step 

Fig 3: Identifying A28 Buzzer Connector Terminals And A52 ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the A28 buzzer connector.
2. Disconnect the A52 ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   A52-14 (BZR) - A28-1	Always	Below 1 Ω
   A28-2 - Body ground
   A52-14 (BZR) or A28-1 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Temporarily replace the wireless door lock buzzer with a new one. Refer to REMOVAL .
2. Check that the wireless door lock buzzer sounds by using the transmitter LOCK/UNLOCK switch.

   OK

   Wireless door lock buzzer sounds.

NG → See step   8 

OK → END (WIRELESS DOOR LOCK BUZZER IS DEFECTIVE) 

1. Temporarily replace the front multiplex network light ECU (front controller) with a new one.
2. Check that the wireless door lock buzzer sounds by using transmitter LOCK/UNLOCK switch.

   OK

   Wireless door lock buzzer sounds.

NG → See step   12 

OK → END (FRONT MULTIPLEX NETWORK LIGHT ECU IS DEFECTIVE)