Driver Side Door Entry Unlock Function does not Operate [03/2017 - ]: Procedure

1. When the door control switch on the power window regulator master switch assembly is operated, check that the doors unlock and lock according to switch operation (Refer to OPERATION CHECK [03/2017 - ] ).

   OK

   Door locks operate normally.

Result: 

NG 

GO TO POWER DOOR LOCK CONTROL SYSTEM (PROCEED TO PROBLEM SYMPTOMS TABLE). Refer to  PROBLEM SYMPTOMS TABLE [06/2016 - ] 

Result: 

OK 

See step  2

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. According to the display on the Techstream, read the Data List.
   MAIN BODY
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   D-Door Lock Pos SW	Driver side door unlock detection switch signal / LOCK or UNLOCK	LOCK: Driver side door locked UNLOCK: Driver side door unlocked	-

   OK

   On the Techstream screen, the display changes between ON and OFF as shown in the table above.

Result: 

NG 

GO TO LIGHTING SYSTEM (PROCEED TO DOOR UNLOCK DETECTION SWITCH CIRCUIT). Refer to  Door Unlock Detection Switch Circuit [03/2017 - ] 

Result: 

OK 

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 / Smart Key / Data List.
5. According to the display on the Techstream, read the Data List.
   SMART KEY
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   D-Door Touch Sensor	Front door outside handle assembly LH (lock sensor) / OFF or ON	OFF: Front door outside handle assembly LH (unlock sensor) not touched ON: Front door outside handle assembly LH (unlock sensor) touched	Displays whether the unlock sensor is on or off (even if the sensor is touched and contact is maintained, "ON" is displayed only momentarily). Use this Data List item to help determine if there is an unlock sensor malfunction when the entry unlock function does not operate.

   OK

   On the Techstream screen, the display changes between ON and OFF as shown in the table above.

Result: 

OK 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [03/2017 - ] 

Result: 

NG 

See step  4

1. Disconnect the D41and D48 certification ECU (smart key ECU assembly) connectors.
2. Disconnect the E1 front door outside handle assembly LH connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D41-22 (SEN1) - E1-4 (SENS)	Always	Below 1 Ω
   D48-11 (GND) - Body ground	Always	Below 1 Ω
   D41-22 (SEN1) or E1-4 (SENS) - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

1. Reconnect the D41 and D48 certification ECU (smart key ECU assembly) connectors.
2. Reconnect the E1 front door outside handle assembly LH connector.
3. Using an oscilloscope, check the waveform.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Certification ECU (smart key ECU assembly))	*b	Waveform
   *c	In actuality, sampling is being performed	-	-

   OK

   Tester Connection	Switch Condition	Tool Setting	Specified Condition
   D41-22 (SEN1) - D48-11 (GND)	Procedure: Engine switch off Electrical key transmitter sub-assembly brought outside vehicle All doors locked Electrical key transmitter sub-assembly not sufficiently close to vehicle Driver side door unlock sensor not touched → touched	2 V/DIV., 500 ms/DIV	Pulse generation (See waveform)

Result: 

OK 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [03/2017 - ] 

Result: 

NG 

REPLACE FRONT DOOR OUTSIDE HANDLE ASSEMBLY LH. Refer to  DISASSEMBLY [03/2017 - 12/2017]  Refer to  DISASSEMBLY [12/2017 - ]