No Answer-Back [12/2019 - 11/2023]: Procedure

1. Select the setting by referring to the table below.

   Wireless Door Lock 

   Tester Display	Description	Default	Setting	ECU
   Hazard Answer Back	Function that flashes the hazard warning lights once when the doors are locked by wireless operation and twice when the doors are unlocked by wireless operation	ON	0:OFF, 1:ON	Main body ECU (Multiplex network body ECU)
   Wireless Buzzer Resp	Function that enables/disables the wireless door lock buzzer response	ON	0:OFF, 1:ON	Main body ECU (Multiplex network body ECU)
   Wireless Buzzer Vol	Function that adjusts the 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
   All settings are ON and other than Level0	A
   A setting is OFF or Level0	B

Result: 

B 

PERFORM CUSTOMIZE FUNCTION. Refer to  CUSTOMER PROBLEM ANALYSIS CHECK [12/2019 - 11/2023] 

Result: 

A 

See step  2

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

   Refer to OPERATION CHECK [12/2019 - 11/2023]

   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 [12/2019 - 11/2023] 

Result: 

A 

See step  3

1. Read the Data List according to the display on the GTS.

   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	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	OFF or ON	OFF: Rear door LH locked ON: Rear door LH unlocked	-

   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 GTS 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 [12/2019 - 11/2023] 

Result: 

OK 

See step  4

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

   Refer to OPERATION CHECK [12/2019 - 11/2023]

   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. Perform the Active Test according to the display on the GTS.

   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 door lock buzzer does not sound	A
   Wireless door lock buzzer sounds	B

Result: 

B 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [12/2019 - 10/2022]  , or refer to  REMOVAL [10/2022 - 11/2023] 

Result: 

A 

See step  6

1. Disconnect the A22 wireless door lock buzzer connector.
2. Perform the Active Test according to the display on the GTS.

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A22-1- A22-2	Active Test Wireless Buzzer is OFF	Below 1 V
   	Active Test Wireless Buzzer is ON	Pulse generation (frequency: 2 kHz, high voltage: 11 to 14 V, low voltage: 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 [12/2019 - ] 

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 [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023]

2. Reconnect the instrument panel junction block assembly connectors.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A22-1 - MB-21 (BZR)	Always	Below 1 Ω
   A22-2 - Body ground	Always	Below 1 Ω
   A22-1 or MB-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 [12/2019 - 10/2022]  , or refer to  REMOVAL [10/2022 - 11/2023] 

Result: 

NG 

See step  8

1. Disconnect the 4C instrument panel junction block assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A22-1 - 4C-29	Always	Below 1 Ω
   A22-1 or 4C-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 [12/2019 - 10/2022]  , or refer to  REMOVAL [10/2022 - 11/2023] 

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 [12/2019 - 10/2022]  , or refer to  REMOVAL [10/2022 - 11/2023] 

Result: 

NG 

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

w/ AFS: Refer to Hazard Warning Switch Circuit [12/2019 - 10/2022] , or refer to Hazard Warning Switch Circuit [10/2022 - ]

w/o AFS: Refer to Hazard Warning Switch Circuit [12/2019 - 10/2022] , or refer to Hazard Warning Switch Circuit [10/2022 - ]