No Answer-Back [12/2021 - 10/2023]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Customize Setting / Wireless Door Lock.
5. Select the setting by referring to the table below.

   Wireless Door Lock 

   Tester Display	Description	Default	Setting	ECU
   Hazard Answer Back	When the doors are locked by wireless operation, the hazard warning lights flash once. When the doors are unlocked by wireless operation, the hazard warning lights flash twice.	ON	0:OFF, 1:ON	Main body ECU (Multiplex network body ECU)
   Wireless Buzzer Resp	Wireless door lock buzzer response	ON	0:OFF, 1:ON	Main body ECU (Multiplex network body ECU)
   Wireless Buzzer Vol	Wireless door lock buzzer volume	Level5	0000:Level7, 0001:Level6, 0010:Level5, 0011:Level4, 0100:Level3, 0101:Level2, 0110:Level1, 0111:Level0	Main body ECU (Multiplex network body ECU)

   Result

   Result	Proceed to
   Both items are ON and except Level 0	A
   Either item is OFF or Level 0	B

Result: 

B 

PERFORM CUSTOMIZE FUNCTION 

Refer to CUSTOMIZE PARAMETERS [08/2020 - 10/2022] , or refer to CUSTOMIZE PARAMETERS [10/2022 - 10/2023]

Result: 

A 

See step  2

1. Check the wireless door lock control function using the electrical key transmitter sub-assembly.

   Refer to OPERATION CHECK [08/2020 - 10/2023]

   Result

   Result	Proceed to
   Wireless door lock/unlock operates properly.	A
   Wireless door lock/unlock does not operate properly.	B

Result: 

B 

GO TO PROBLEM SYMPTOMS TABLE 

Refer to PROBLEM SYMPTOMS TABLE [11/2018 - ]

Result: 

A 

See step  3

1. Connect the Techstream to the DLC3.
2. Turn the power 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	LOCK or UNLOCK	LOCK: Front door RH locked UNLOCK: Front door RH unlocked	-
   FL Door Lock Pos	Front door LH unlock detection switch signal	LOCK or UNLOCK	LOCK: Front door LH locked UNLOCK: Front door LH unlocked	-
   RR-Door Lock Pos SW	Rear door RH unlock detection switch signal*1	OFF or ON	OFF: Rear door RH locked ON: Rear door RH unlocked	-
   RL-Door Lock Pos SW	Rear door LH unlock detection switch signal*1 Rear door RH and LH unlock detection switch signal*2	OFF or ON	OFF: Rear door LH locked*1 OFF: Rear door RH and LH locked*2 ON: Rear door LH unlocked*1 ON: Rear door RH or LH unlocked*2	-

   1. *1: w/ Memory Call Function
   2. *2: w/o Memory Call Function

   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 [11/2018 - 10/2023]

Result: 

OK 

See step  4

1. Check the wireless answer-back operation using the electrical key transmitter sub-assembly.

   Refer to OPERATION CHECK [08/2020 - 10/2023]

   Result

   Result	Proceed to
   Only wireless door lock buzzer answer-back does not occur.	A
   Only hazard warning light answer-back does not occur.	B

Result: 

B 

See step  9

Result: 

A 

See step  5

1. Connect the Techstream to the DLC3.
2. Turn the power 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 MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

Refer to REMOVAL [12/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023]

Result: 

A 

See step  6

1. Disconnect the A18 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
   A18-1 (B) - A18-2 (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

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE WIRELESS DOOR LOCK BUZZER 

Refer to REMOVAL [08/2020 - ]

Result: 

NG 

See step  7

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

   Refer to REMOVAL [12/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023]

2. Disconnect the A18 wireless door lock buzzer connector.
3. Reconnect the 4F 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
   A18-1 (B) - A-21 (BZR)	Always	Below 1 Ω
   A18-2 (E) - Body ground	Always	Below 1 Ω
   A18-1 (B) or A-21 (BZR) - Other terminals and 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 [12/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023]

Result: 

NG 

See step  8

1. Disconnect the 4F instrument panel junction block assembly connector.
2. Disconnect the A18 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
   A18-1 (B) - 4F-29	Always	Below 1 Ω
   A18-1 (B) or 4F-29 - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

Refer to REMOVAL [12/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023]

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Check that the hazard warning lights blink when the hazard warning signal switch is pressed.

   OK

   Hazard warning lights blink.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

Refer to REMOVAL [12/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023]

Result: 

NG 

GO TO LIGHTING SYSTEM (Proceed to Hazard Warning Switch Circuit) 

Refer to Hazard Warning Switch Circuit [12/2021 - 10/2022] , or refer to Hazard Warning Switch Circuit [10/2022 - ]