Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VJKI
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 -           ]
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM(for Entry Function): All Door Entry Lock/Unlock Functions do not Operate, but Wireless Functions Operate; 2016 - 2020 MY Sienna [12/2015 -        ]

All Door Entry Lock/Unlock Functions do not Operate, but Wireless Functions Operate

DESCRIPTION

When the wireless door lock and unlock functions operate, the communication circuit between the door lock receiver assembly and certification ECU (smart key ECU assembly) is normal. When the entry lock and unlock functions do not operate, radio wave interference, a customized entry cancel function, or a communication error between the key and vehicle in the smart communication circuit, is suspected.

CAUTION / NOTICE / HINT

NOTICE:

  • The smart key 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 (See page 2016 - 2020 MY Sienna [12/2015 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM(for Entry Function): HOW TO PROCEED WITH TROUBLESHOOTING ). Troubleshoot the smart key system (for entry function) after confirming that the communication system is functioning properly.
  • Confirm that another key is not in the cabin.

PROCEDURE

1.

CHECK POWER DOOR LOCK OPERATION

(a) When the door control switch on the master switch assembly is operated, check that the doors unlock and lock according to switch operation (See page 2016 - 2020 MY Sienna [12/2015 -        ]; DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM: OPERATION CHECK ).

OK:

Door locks operate normally.

NG

GO TO POWER DOOR LOCK CONTROL SYSTEM (Proceed to Problem Symptoms Table)

OK

2.

READ VALUE USING TECHSTREAM (ENTRY CANCEL FUNCTION)

(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 / Smart Key / Data List.

(e) Read the Data List according to the display on the Techstream.

Smart Key (Certification ECU (Smart Key ECU Assembly))

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Auto Entry Cancel SW

Entry function cancel / ON or OFF

Mode status displayed

-

Result

Proceed to

Entry function cancel is off.

A

Entry function cancel is on.

B
B

PERFORM CANCELLATION OF ENTRY KEY CANCEL FUNCTION

A

3.

CHECK WAVE ENVIRONMENT

(a) Move the key as described below and perform the operation inspection.

HINT:

  • When the key is brought near the door outside handle assembly or outside electrical key oscillator, the possibility of wave interference decreases, and it can be determined if wave interference is causing the problem symptom.
  • The transmitting waves of the wireless functions and entry functions are the same, but the wave logic is different. Therefore, it is possible that only the wireless functions or only the entry functions are affected by wave interference.

(b) Bring the key near the driver door outside handle assembly, and perform a front driver door entry lock and unlock operation check.

Text in Illustration

*a

Approximately 0.3 m (0.984 ft.)

NOTICE:

If the key is brought within 0.2 m (0.656 ft.) of the door outside handle assembly, communication is not possible.

(c) Bring the key near the front passenger door outside handle assembly, and perform a front passenger door entry lock and unlock operation check.

Text in Illustration

*a

Approximately 0.3 m (0.984 ft.)

NOTICE:

If the key is brought within 0.2 m (0.656 ft.) of the door outside handle assembly, communication is not possible.

(d) Bring the key near the outside electrical key oscillator (for rear side), and perform an entry back door open function check.

Text in Illustration

*a

Vehicle Center

*b

Approximately 0.3 m (0.984 ft.)

NOTICE:

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

HINT:

If the inspection result indicates that the problem only occurs in certain locations or times of day, the possibility of wave interference is high. Also, added vehicle components may cause wave interference. If installed, remove them and perform the operation check.

Result:

Result

Proceed to

Entry function does not operate for all doors.

A

Entry function operates for all doors.

B

Entry function operates for an individual door.

C
B

AFFECTED BY WAVE INTERFERENCE
C

GO TO OTHER PROBLEM (Proceed to Problem Symptoms Table)

A

4.

PERFORM KEY DIAGNOSTIC MODE INSPECTION

(a) Diagnostic mode inspection (door electrical key oscillator (for driver side))

Text in Illustration

*a

0.7 to 1.0 m (2.30 to 3.28 ft.)

(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 / Key Communication Check / Overhead + Driver Side.

(5) When the key is in the position shown in the illustration, check that the wireless door lock buzzer sounds.

(b) Diagnostic mode inspection (door electrical key oscillator (for front passenger side))

Text in Illustration

*a

0.7 to 1.0 m (2.30 to 3.28 ft.)

(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 / Key Communication Check / Overhead + Passenger Side.

(5) When the key is in the position shown in the illustration, check that the wireless door lock buzzer sounds.

(c) Diagnostic mode inspection (indoor electrical key oscillator (for front floor))

Text in Illustration

*a

Inspection Point

(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 / Key Communication Check / Overhead + Front Room.

(5) When the key is in the position shown in the illustration, check that the wireless door lock buzzer sounds.

(d) Diagnostic mode inspection (indoor electrical key oscillator (for center floor))

Text in Illustration

*a

Inspection Point

(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 / Key Communication Check / Overhead + Rear Room.

(5) When the key is in the position shown in the illustration, check that the wireless door lock buzzer sounds.

(e) Diagnostic mode inspection (indoor electrical key oscillator (for rear floor))

Text in Illustration

*a

Vehicle Center

*b

0.1 m (0.328 ft.)

*c

Inspection Point

*d

0.2 m (0.656 ft.)

(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 / Key Communication Check / Overhead + Back Door (inside).

(5) When the key 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.

(f) Diagnostic mode inspection (outside electrical key oscillator (for rear side))

Text in Illustration

*a

Vehicle Center

*b

0.7 to 1.0 m (2.30 to 3.28 ft.)

(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 / Key Communication Check / Overhead + Back Door (outside).

(5) When the key is in the position shown in the illustration, check that the wireless door lock buzzer sounds.

Result:

Result

Proceed to

Wireless door lock buzzer does not sound for all electrical key oscillators.

A

Wireless door lock buzzer does not sound only for either door electrical key oscillator.

B

Wireless door lock buzzer does not sound only for one indoor electrical key oscillator.

C

Wireless door lock buzzer does not sound only for outside electrical key oscillator (for rear side).

D

Wireless door lock buzzer sounds for all electrical key oscillators.

E
B

GO TO OTHER PROBLEM (Proceed to Problem Symptoms Table for Each Door)

C

GO TO OTHER PROBLEM (Proceed to Room Oscillator does not Recognize Key)

D

GO TO OTHER PROBLEM (Proceed to Problem Symptoms Table)

E

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(See page 2016 - 2017 MY Sienna [12/2015 - 11/2017]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL 2018 - 2020 MY Sienna [11/2017 -        ]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL )
A

5.

CHECK ELECTRICAL KEY TRANSMITTER

(a) Check if another registered key is available.

Result

Proceed to

Another registered key is not available.

A

Another registered key is available.

B
B

GO TO STEP 7

A

6.

REGISTER ELECTRICAL KEY TRANSMITTER

(a) Register a new key (See page 2016 MY Sienna [12/2015 - 08/2016]; THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/ Smart Key System): REGISTRATION 2017 - 2020 MY Sienna [08/2016 -        ]; THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/ Smart Key System): REGISTRATION ).

NEXT

7.

CHECK ELECTRICAL KEY TRANSMITTER (OPERATION)

(a) Using the key registered in the previous step or another registered key, check that the entry function operates normally (See page 2016 - 2020 MY Sienna [12/2015 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM(for Entry Function): OPERATION CHECK ).

OK:

Entry function operates normally.

OK

REPLACE ELECTRICAL KEY TRANSMITTER (REPLACE MALFUNCTIONING KEY)
NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(See page 2016 - 2017 MY Sienna [12/2015 - 11/2017]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL 2018 - 2020 MY Sienna [11/2017 -        ]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL )