Driver Side Door Entry Unlock Function does not Operate: Procedure

1. When the door control switch on the multiplex network master switch assembly on the driver side door is operated, check that the doors unlock and lock according to the switch operation. Refer to OPERATION CHECK .

   OK

   Door locks operate normally.

NG → See step   6 

OK: Go to next step 

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

   Techstream Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   FL Door Lock Pos	Front door unlock detection switch LH signal / LOCK or UNLOCK	LOCK: Front LH side door locked UNLOCK: Front LH side door unlocked	-

   OK

   On the Techstream screen, the display changes between LOCK and UNLOCK as shown in the table above.

NG → See step   9 

OK: Go to next step 

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

   Techstream Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   D-Door Touch Sensor	Front door outside handle assembly (for driver side) (unlock sensor) / ON or OFF	ON: Front door outside handle assembly (for driver side) (unlock sensor) touched ON: Front door outside handle assembly (for driver side) (unlock sensor) not 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.

NG → See step   4 

OK → See step   7 

1. Disconnect the C19 certification ECU (smart key ECU assembly) connector.
2. Disconnect the S1 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
   C19-20 (SEN1) - S1-4 (SENS)	Always	Below 1 Ω
   C19-15 (E) - Body ground	Always	Below 1 Ω
   C19-20 (SEN1) or S1-4 (SENS) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Connect the C19 certification ECU (smart key ECU assembly) connector.
2. Connect the S1 front door outside handle assembly LH connector.
   Fig 1: Identifying Certification ECU (Smart Key ECU Assembly) Connector Terminals With 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	-	-

3. Using an oscilloscope, check the waveform.

   OK

   Tester Connection	Condition	Tool Setting	Specified Condition
   C19-20 (SEN1) - C19-15 (E)	Procedure: Power switch off Electrical key transmitter sub-assembly brought outside vehicle All doors locked Electrical key transmitter sub-assembly not sufficiently close to vehicle Driver door unlock sensor not touched → touched	2 V/DIV., 500 ms/DIV.	Pulse generation (See waveform)

NG → See step   8 

OK → See step   7