ENTRY AND START SYSTEM(for Entry Function) Back Door Entry Lock and Unlock Functions do not Operate

DESCRIPTION

When the back door entry lock and unlock functions do not operate, one of the following may be malfunctioning: 1) power door lock control system; 2) electrical key antenna (outside luggage); or 3) certification ECU (smart key ECU assembly), or 4) back door opener switch.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

Note

The entry and start system (for entry function) uses a multiplex communication system (LIN communication system) and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting Click here. Troubleshoot the entry and start system (for entry function) after confirming that the communication system is functioning properly.
When using the intelligent tester with the engine switch off to troubleshoot: Connect the intelligent tester to the DLC3, and turn a courtesy light switch on and off at 1.5-second intervals until communication between the tester and vehicle begins
Check that there are no electrical key transmitters in the vehicle.
When checking the entry lock operation multiple times, the lock operation may be limited to 2 consecutive operations depending on the settings. In order to perform the entry lock operation 3 or more times, an unlock operation must be performed once (any type of unlock operation is sufficient). However, only consecutive entry lock operations are limited. Using the wireless lock or other types of lock operations, it is possible to perform consecutive lock operations without this limitation.
Before replacing the certification ECU (smart key ECU assembly), refer to the entry and start system (for entry function) Click here.
After repair, confirm DTC not reoccur with performing the "DTC Output Confirmation Operation".

Tech Tips

Check that the entry cancel function, which is one of the customizing settings of the entry and start system, is not set Click here.

PROCEDURE

CHECK POWER DOOR LOCK OPERATION
1. Check that the doors unlock when the door control switch on the power window regulator master switch assembly is operated, and that the back door unlatches when the open switch is pushed Click here.
  
  OK
  
  Back door unlatches normally.
NG
GO TO POWER DOOR LOCK CONTROL SYSTEM (PROCEED TO PROBLEM SYMPTOMS TABLE) Click here

OK

OK
Back door unlatches normally.

CHECK WAVE ENVIRONMENT

Text in Illustration
*a	Vehicle center
*b	Approximately 0.3 m (0.98 ft.)

Bring the electrical key transmitter near the electrical key antenna (outside luggage), and perform an entry back door open and entry lock functions check.

Note

If the key is brought within 0.2 m (0.656 ft.) of the rear bumper, communication is not possible.

Tech Tips

When the electrical key transmitter is brought near the electrical key antenna, the possibility of wave interference decreases, and it can be determined if wave interference is causing the problem symptom.
If the operation is normal, the possibility of wave interference is high. Also, added vehicle components may cause wave interference. If installed, remove them and perform the operation.

OK
Entry functions operate normally.

AFFECTED BY WAVE INTERFERENCE

INSPECT BACK DOOR OPENER SWITCH ASSEMBLY
1. Remove the back door opener switch assembly Click here.
2. Inspect the back door opener switch assembly Click here.
NG
REPLACE BACK DOOR OPENER SWITCH ASSEMBLY Click here

OK

CHECK HARNESS AND CONNECTOR

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

Standard Resistance

Tester Connection	Condition	Specified Condition
P8-2 (E) - Body ground	Always	Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR

PERFORM KEY DIAGNOSTIC MODE INSPECTION

Text in Illustration
*a	Vehicle center
*b	0.7 to 1.0 m (2.30 to 3.28 ft.)

Diagnostic mode inspection (electrical key antenna (outside luggage))

Note

Perform this check with the vehicle is stopped.

Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG).
Turn the intelligent tester on.
Enter the following menus: Body / Entry & Start / Key Communication Check / Overhead + Back Door.
When the electrical key transmitter is held at the same height as the rear bumper upper surface and aligned with the center of the rear of the vehicle, check that the wireless door lock buzzer sounds.

Tech Tips

If the buzzer sounds, it can be determined that the electrical key antenna (outside luggage) is operating normally.

OK

Wireless door lock buzzer sounds.

OK
Wireless door lock buzzer sounds.

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - ELECTRICAL KEY ANTENNA)

Disconnect the F64 certification ECU (smart key ECU assembly) connector.
Disconnect the K13 electrical key antenna (outside luggage) connector.

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

Standard Resistance (Check for Open)

Tester Connection	Condition	Specified Condition
F64-2 (CLG8) - K13-1 (CLG5)	Always	Below 1 Ω
F64-1 (CG8B) - K13-2 (CLGB)	Always	Below 1 Ω

Standard Resistance (Check for Short)

Tester Connection	Condition	Specified Condition
F64-2 (CLG8) - Body ground	Always	10 kΩ or higher
K13-1 (CLG5) - Body ground	Always	10 kΩ or higher
F64-1 (CG8B) - Body ground	Always	10 kΩ or higher
K13-2 (CLGB) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

INSPECT ELECTRICAL KEY ANTENNA (for Outside Luggage)

Text in Illustration

*a
Component without harness connected

(Electrical Key Antenna (Outside Luggage))

Remove the electrical key antenna (outside luggage) Click here.

Text in Illustration
*a	Component without harness connected (Electrical Key Antenna (Outside Luggage))

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

Standard Resistance

Tester Connection	Condition	Specified Condition
1 (CLG5) - 2 (CLGB)	Always	Below 1 Ω

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

REPLACE ELECTRICAL KEY ANTENNA (for Outside Luggage) Click here