No Answer-Back [02/2014 - ]: 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	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	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	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 [02/2014 - ] .

Result: 

A 

See step  2

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

   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 [02/2014 - ] .

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

   Proceed to
   OK
   NG

Result: 

NG 

GO TO LIGHTING SYSTEM (Proceed to Door Unlock Detection Switch Circuit): 

Refer to Door Unlock Detection Switch Circuit [02/2014 - ] .

Result: 

OK 

See step  4

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

   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  10

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 the 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	Proceed to
   Wireless door lock buzzer does not turn on/off	A
   Wireless door lock buzzer turns on/off	B

Result: 

B 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU): 

Refer to REMOVAL [02/2014 - 11/2016] .

Refer to REMOVAL [11/2016 - ] .

Result: 

A 

See step  6

1. Disconnect the A31 wireless door lock buzzer connector.
2. Disconnect the 4F instrument panel junction block assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A31-1 (B) - 4F-30	Always	Below 1 Ω
   A31-2 (E) - Body ground	Always	Below 1 Ω
   A31-1 (B) or 4F-30 - Body ground	Always	10 kΩ or higher

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  7

1. Remove the instrument panel junction block assembly.

   Refer to REMOVAL [02/2014 - 11/2016] .

   Refer to REMOVAL [11/2016 - ] .

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Component without harness connected (Instrument Panel Junction Block Assembly)

   -

   -

2. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   4F-30 - MB-21 (BZR)	Always	Below 1 Ω

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY: 

Refer to REMOVAL [02/2014 - 11/2016] .

Refer to REMOVAL [11/2016 - ] .

Result: 

OK 

See step  8

1. Temporarily replace the wireless door lock buzzer with a new one.

   Refer to REMOVAL [02/2014 - ] .

Result: 

NEXT 

See step  9

1. Check the operation of the wireless answer-back function.

   Refer to OPERATION CHECK [02/2014 - 11/2016] .

   Refer to OPERATION CHECK [11/2016 - ] .

   OK

   Wireless answer-back function operates normally.

   Proceed to
   OK
   NG

Result: 

OK 

END (WIRELESS DOOR LOCK BUZZER WAS DEFECTIVE) 

Result: 

NG 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU): 

Refer to REMOVAL [02/2014 - 11/2016] .

Refer to REMOVAL [11/2016 - ] .

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

   OK

   Hazard warning lights blink.

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU): 

Refer to REMOVAL [02/2014 - 11/2016] .

Refer to REMOVAL [11/2016 - ] .

Result: 

NG 

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

Refer to Hazard Warning Switch Circuit [02/2014 - ] .