Entry Exterior Alarm and Answer-back Buzzer do not Sound [10/2014 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Customize Setting / Wireless Door Lock.

   Wireless Door Lock 

   Tester Display	Description	Default	Setting	ECU
   Wireless Buzzer Resp	Wireless buzzer response	ON	0:OFF, 1:ON	Main body ECU (multiplex network body ECU)

   Result

   Result	Proceed to
   "ON" is displayed	A
   "OFF" is displayed	B

Result: 

B 

PERFORM CUSTOMIZE SETTING. Refer to  CUSTOMIZE PARAMETERS [10/2014 - 09/2017]  , or refer to  CUSTOMIZE PARAMETERS [09/2017 - ] 

Result: 

A 

See step  2

1. Check that the wireless door lock functions operate normally.

   Refer to OPERATION CHECK [10/2014 - ]

   Result

   Result	Proceed to
   Wireless door lock function operates normally	A
   Wireless door lock function does not operate normally	B

Result: 

B 

GO TO PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [10/2014 - 09/2017]  , or refer to  PROBLEM SYMPTOMS TABLE [09/2017 - ] 

Result: 

A 

See step  3

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Main Body / Data List.
5. Read the Data List according to the display on the Techstream.

   Body Electrical > Main Body > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   FR Door Lock Pos	Front door RH unlock detection switch signal	UNLOCK or LOCK	UNLOCK: Front door RH unlocked LOCK: Front door RH locked	-
   FL Door Lock Pos	Front door LH unlock detection switch signal	UNLOCK or LOCK	UNLOCK: Front door LH unlocked LOCK: Front door LH locked	-
   RR-Door Lock Pos SW	Rear door RH unlock detection switch signal	ON or OFF	ON: Rear door RH unlocked OFF: Rear door RH locked	-
   RL-Door Lock Pos SW	Rear door LH unlock detection switch signal	ON or OFF	ON: Rear door LH unlocked OFF: Rear door LH locked	-

   Body Electrical > Main Body > Data List 

   Tester Display
   FR Door Lock Pos
   FL Door Lock Pos
   RR-Door Lock Pos SW
   RL-Door Lock Pos SW

   OK

   The Techstream display changes correctly in response to the lock/unlock operation.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO LIGHTING SYSTEM (Proceed to Door Unlock Detection Switch Circuit). Refer to  Door Unlock Detection Switch Circuit [10/2014 - ] 

Result: 

OK 

See step  4

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Main Body / Active Test.
5. Perform Active Test according to the display on the Techstream.

   Body Electrical > Main Body > Active Test 

   Tester Display	Measurement Item	Control Range	Diagnostic Note
   Wireless Buzzer	Wireless door lock buzzer	OFF/ON	-

   Body Electrical > Main Body > Active Test 

   Tester Display
   Wireless Buzzer

   Result

   Result	Proceed to
   Wireless buzzer does not sound	A
   Wireless buzzer sounds	B

Result: 

B 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [10/2014 - ] 

Result: 

A 

See step  5

1. Disconnect the A9 wireless door lock buzzer connector.
2. Perform the Active Test using the Techstream and sound the wireless door lock buzzer.

   Body Electrical > Main Body > Active Test 

   Tester Display	Measurement Item	Control Range	Diagnostic Note
   Wireless Buzzer	Wireless door lock buzzer	OFF/ON	-

   Body Electrical > Main Body > Active Test 

   Tester Display
   Wireless Buzzer

3. While performing the Active Test, measure the voltage between the terminals of the wireless door lock buzzer.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A9-1 (B) - A9-2 (E)	Active Test Wireless Buzzer ON	Pulse generation (frequency: 2 kHz, high voltage: 11 to 14 V, low voltage: below 1 V)
   	Active Test Wireless Buzzer OFF	Below 1 V

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Wireless Door Lock Buzzer)

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE WIRELESS DOOR LOCK BUZZER. Refer to  REMOVAL [10/2014 - ] 

Result: 

NG 

See step  6

1. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

   Refer to REMOVAL [10/2014 - 05/2019] , or refer to REMOVAL [05/2019 - ]

2. Disconnect the A9 wireless door lock buzzer connector.
3. Reconnect the 4B instrument panel junction block assembly connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A9-1 (B) - A-21 (BZR)	Always	Below 1 Ω
   A9-2 (E) - Body ground	Always	Below 1 Ω
   A9-1 (B) or A-21 (BZR) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [10/2014 - 05/2019]  , or refer to  REMOVAL [05/2019 - ] 

Result: 

NG 

See step  7

1. Disconnect the 4B instrument panel junction block assembly connector.
2. Disconnect the A9 wireless door lock buzzer connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A9-1 (B) - 4B-52 (BZR)	Always	Below 1 Ω
   A9-1 (B) or 4B-52 (BZR) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [10/2014 - 05/2019]  , or refer to  REMOVAL [05/2019 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR