DESCRIPTION If the entry
unlock function does not operate for the driver door only, but the entry
lock function operates, the request code is being transmitted properly
from the driver door. In this case, there may be a problem related to
the unlock sensor (connection between the certification ECU (smart key
ECU assembly) and front door outside handle assembly (for driver door)). WIRING DIAGRAM
 CAUTION / NOTICE / HINT
NOTICE:
- The smart key system (for Entry Function, Gasoline Model) uses the CAN
communication system. Inspect the communication function by following
How to Proceed with Troubleshooting. Troubleshoot the smart key system
(for Entry Function, Gasoline Model) after confirming that the
communication systems are functioning properly.
Click here 
- When using the Techstream with the engine switch off, connect the
Techstream to the DLC3 and turn a courtesy light switch on and off at
intervals of 1.5 seconds or less until communication between the
Techstream and the vehicle begins. Then select the vehicle type under
manual mode and enter the following menus: Body Electrical / Smart Key.
While using the Techstream, periodically turn a courtesy light switch on
and off at intervals of 1.5 seconds or less to maintain communication
between the Techstream and the vehicle.
- Check that there are no electrical key transmitter sub-assemblies in the vehicle.
- Before replacing the certification ECU (smart key ECU assembly), refer to Precaution.
Click here
- After repair, confirm that no DTCs are output.
PROCEDURE |
1. | CHECK POWER DOOR LOCK CONTROL SYSTEM |
(a)
When the door control switch on the multiplex network master switch
assembly is operated, check that the doors unlock and lock according to
the switch operation. Click here OK:
Door locks operate normally.
| NG |  |
GO TO POWER DOOR LOCK CONTROL SYSTEM (for Gasoline Model) |
|
OK |
 | |
| 2. |
READ VALUE USING TECHSTREAM (FL DOOR LOCK POS) |
(a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG).
(c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Main Body / Data List.
(e) 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 | |
FL Door Lock Pos | Front door LH unlock detection switch signal |
UNLOCK or LOCK | UNLOCK: Front door LH unlocked
LOCK: Front door LH locked |
- | Body Electrical > Main Body > Data List
|
Tester Display | | FL Door Lock Pos |
OK: The Techstream display changes correctly in response to the lock/unlock operation of the driver door.
| NG |
| GO TO LIGHTING SYSTEM (for Gasoline Model (Proceed to Door Unlock Detection Switch Circuit)) |
|
OK | |
| |
| 3. |
READ VALUE USING TECHSTREAM (D-DOOR TOUCH SENSOR) |
(a) Turn the engine switch off. (b) Open and close the driver door.
(c)
With the electrical key transmitter sub-assembly outside of the
vehicle, press the lock switch of the electrical key transmitter
sub-assembly to lock all of the doors. (d) Hold the
electrical key transmitter sub-assembly at the same height as the door
outside handle assembly and approximately 0.3 m (0.984 ft.) from the
driver door. (e) Check that the LED of the electrical key transmitter sub-assembly blinks.
(f) Read the Data List according to the display on the Techstream.
| (g) Touch the unlock sensor on the backside of the front door outside handle assembly (for driver door).
HINT: When checking the operation of the unlock sensor again, make sure to perform the procedure from step (a). Body Electrical > Smart Key > Data List |
Tester Display | Measurement Item |
Range | Normal Condition |
Diagnostic Note | |
D-Door Touch Sensor |
Driver door touch sensor (unlock sensor) |
OFF or ON | OFF: Driver door touch sensor (unlock sensor) not touched
ON: Driver door touch sensor (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.
| Body Electrical > Smart Key > Data List |
Tester Display | |
D-Door Touch Sensor | OK:
The
Techstream display changes correctly in response to the operation of
the front door outside handle assembly (for driver door). |
 |
|
*a | Unlock Sensor (Backside) | | |
| OK |
| REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
|
NG | |
| |
| 4. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - FRONT DOOR OUTSIDE HANDLE ASSEMBLY (FOR DRIVER DOOR)) |
(a) Disconnect the K10 certification ECU (smart key ECU assembly) connector.
(b) Disconnect the I23 front door outside handle assembly (for driver door) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
K10-17 (CLG1) - I23-6 (ANTE1) |
Always | Below 1 Ω | |
K10-16 (CG1B) - I23-4 (CLGB) |
Always | Below 1 Ω | |
K10-17 (CLG1) or I23-6 (ANTE1) - Other terminals and body ground |
Always | 10 kΩ or higher | |
K10-16 (CG1B) or I23-4 (CLGB) - Other terminals and body ground |
Always | 10 kΩ or higher |
(d) Reconnect the I23 front door outside handle assembly (for driver door) connector.
(e) Reconnect the K10 certification ECU (smart key ECU assembly) connector.
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
OK | |
| |
| 5. |
CHECK FRONT DOOR OUTSIDE HANDLE ASSEMBLY (FOR DRIVER DOOR) (INPUT TO CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)) |
|
*a | Component with harness connected
(Certification ECU (Smart Key ECU Assembly)) |
*b | Waveform 1 | |
*c | Unlock sensor not touched |
*d | Unlock sensor touched |
(a) Using an oscilloscope, check the waveform. OK: |
Tester Connection | Condition |
Tool Setting | Specified Condition | |
K10-17 (CLG1) - G40-18 (E) |
Procedure:
- Engine switch off
- Electrical key transmitter sub-assembly brought outside vehicle
- All doors locked
- Electrical key transmitter sub-assembly not near the vehicle
- Driver door unlock sensor touched
| 5 V/DIV., 50 ms/DIV. |
Pulse generation (See waveform 1) |
| OK |
| REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
| NG |
| REPLACE FRONT DOOR OUTSIDE HANDLE ASSEMBLY (FOR DRIVER DOOR) | | 
