ENTRY AND START SYSTEM(for Entry Function) Key Luggage Compartment Lock-in Prevention Function does not Operate

DESCRIPTION

If the entry luggage compartment lock-in prevention function does not operate, there may be a problem with the communication between the No. 3 indoor electrical key oscillator (inside luggage) and electrical key transmitter sub-assembly, wave interference or a malfunction in the certification ECU (smart key ECU assembly).

WIRING DIAGRAM


*a	No. 3 Indoor Electrical Key Oscillator (Inside Luggage)
*b	Certification ECU (Smart Key ECU Assembly)

CAUTION / NOTICE / HINT

Note

When using the GTS with the engine switch off to troubleshoot:

Connect the GTS to the DLC3 and turn a courtesy light switch on and off at 1.5-second intervals until communication between the GTS and vehicle begins.
The entry and start system (for Entry Function) uses the CAN communication system and LIN communication system. First inspect the communication systems by following How to Proceed with Troubleshooting Click here. Troubleshoot the entry and start system (for Entry Function) after confirming that the communication systems are functioning properly.
Check that there are no electrical key transmitter sub-assemblies in the vehicle.
Before performing the inspection, check that DTC B1242 (wireless door lock control) is not output Click here.
Before replacing the certification ECU (smart key ECU assembly), refer to the entry and start system (for Entry Function) precaution Click here.
After repair, confirm that no DTCs are output by performing the "DTC Output Confirmation Operation".

PROCEDURE

CHECK ENTRY FUNCTION (ENTRY LUGGAGE COMPARTMENT OPEN FUNCTION)

Check that the entry luggage compartment open function operates Click here.

Result

Result	Proceed to
Entry luggage compartment door open function operates	A
Entry luggage compartment door open function does not operate	B

GO TO OTHER PROBLEM (Proceed to Problem Symptoms Table) Click here

CHECK WAVE ENVIRONMENT
1. Text in Illustration
  
  *a Inspection Point
  
  Bring the electrical key transmitter sub-assembly near the No. 3 indoor electrical key oscillator (inside luggage), and check that the entry luggage compartment lock-in prevention function operates.
  
  Note
  
  If the electrical key transmitter sub-assembly is brought within 0.2 m (0.656 ft.) of the No. 3 indoor electrical key oscillator (inside luggage), communication is not possible.
  Tech Tips
  - When the electrical key transmitter sub-assembly is brought near the No. 3 indoor electrical key oscillator (inside luggage), the possibility of wave interference decreases, and it can be determined if wave interference is causing the problem symptom.
  - If the operation check 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 check.
  OK
  
  Entry functions operate normally.
OK
AFFECTED BY WAVE INTERFERENCE

NG
CHECK KEY DIAGNOSTIC MODE
1. Text in Illustration
  
  *a Inspection Point
  
  Check the following antennas in the key diagnostic mode Click here.
2. When the electrical key transmitter sub-assembly 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
  - Place the key in the luggage area.
  - If the buzzer sounds, it can be determined that the No. 3 indoor electrical key oscillator (inside luggage compartment) is operating normally.
  OK
  
  Wireless door lock buzzer sounds.
OK
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

Text in Illustration
*a	Inspection Point

OK
Entry functions operate normally.

Text in Illustration
*a	Inspection Point

OK
Wireless door lock buzzer sounds.

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - NO. 3 INDOOR ELECTRICAL KEY OSCILLATOR)

Disconnect the D40 certification ECU (smart key ECU assembly) connector.
Disconnect the H9 No. 3 indoor electrical key oscillator (inside luggage) connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
D40-9 (CLG7) - H9-1 (ANTE7)	Always	Below 1 Ω
D40-8 (CG7B) - H9-3 (CLGB)	Always	Below 1 Ω
D40-9 (CLG7) - Body ground	Always	10 kΩ or higher
D40-8 (CG7B) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

Connect the D40 certification ECU (smart key ECU assembly) connector.
Disconnect the H9 No. 3 indoor electrical key oscillator (inside luggage) connector.

Text in Illustration
*a	Front view of wire harness connector (to No. 3 Indoor Electrical Key Oscillator (inside luggage compartment))
*b	Waveform
*c	Driver side door lock sensor not touched
*d	Driver side door lock sensor touched

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

Tester Connection

Switch Condition

Tool Setting

Specified Condition

H9-1 (ANTE7) - H9-3 (CLGB)

Procedure:

Engine switch off
Electrical key transmitter sub-assembly not inside vehicle
All doors closed
Driver door lock sensor not touched → touched

2 V/DIV., 500 ms/DIV.

Pulse generation (See waveform)

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

REPLACE NO. 3 INDOOR ELECTRICAL KEY OSCILLATOR (INSIDE LUGGAGE)
1. Replace the No. 3 indoor electrical key oscillator (inside luggage) Click here.
NEXT
CHECK NO. 3 INDOOR ELECTRICAL KEY OSCILLATOR (INSIDE LUGGAGE)
1. Check that the entry luggage compartment lock-in prevention function operates normally Click here.
  
  OK
  
  Entry luggage compartment lock-in prevention function operates normally.
OK
END (NO. 3 INDOOR ELECTRICAL KEY OSCILLATOR WAS DEFECTIVE)

NG
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)