Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001QT4Y
Model Year Start: 2021 Model: RAV4 Prod Date Range: [08/2020 - 12/2021]
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): New Key cannot be Registered; 2021 MY RAV4 [08/2020 - 12/2021]

New Key cannot be Registered

DESCRIPTION

If a new electrical key transmitter sub-assembly could not be registered, wave interference or a malfunction of the certification ECU (smart key ECU assembly), electrical key transmitter sub-assembly, steering lock ECU (steering lock actuator with ECU assembly) or door control receiver assembly is suspected.

The registration procedure to add another electrical key transmitter sub-assembly (without replacing any parts) is called "additional key ID registration".

If additional registration is not possible, refer to Additional Key cannot be Registered.

Click here 2019 - 2021 MY RAV4 [11/2018 - 12/2021]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): Additional Key cannot be Registered

HINT:

If any of the following have been performed, registration of all electrical key transmitter sub-assemblies is necessary:

  • The certification ECU (smart key ECU assembly) has been replaced.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • 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.
  • The smart key system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly.

    Click here 2021 MY RAV4 [08/2020 - 12/2021]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): HOW TO PROCEED WITH TROUBLESHOOTING

  • Before replacing the electrical key transmitter sub-assembly, certification ECU (smart key ECU assembly), steering lock ECU (steering lock actuator with ECU assembly), refer to the Registration.

    Click here 2021 MY RAV4 [08/2020 - 12/2021]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION

  • If registration of an electrical key transmitter sub-assembly cannot be performed, refer to the Registration.

    Click here 2021 MY RAV4 [08/2020 - 12/2021]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION

  • New registration mode can be entered only when no electrical key transmitter sub-assemblies are stored in the certification ECU (smart key ECU assembly).
  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

PROCEDURE

1.

CHECK FOR DTC

(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 / Trouble Codes.

(e) Check for DTCs.

Body Electrical > Smart Key > Trouble Codes

NOTICE:

If a malfunction occurs, do not remove/install the vehicle battery before checking for DTCs.

OK:

DTCs are not output.

NG

GO TO DIAGNOSTIC TROUBLE CODE CHART

OK

2.

READ VALUE USING TECHSTREAM (NUMBER OF REGISTERED KEY CODES)

(a) Enter the following menus: Body Electrical / Smart Key / Data List.

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

HINT:

A new certification ECU (smart key ECU assembly) will have no registered electrical key transmitter sub-assemblies.

Body Electrical > Smart Key > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Number of Registered Key Codes

Number of registered electrical key transmitter sub-assemblies

0 to 8

Number of registered electrical key transmitter sub-assemblies

Up to 7 electrical key transmitter sub-assemblies can be registered

Body Electrical > Smart Key > Data List

Tester Display

Number of Registered Key Codes

OK:

"0" is displayed on the Techstream display.

NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

OK

3.

READ VALUE USING TECHSTREAM (OPERATION HISTORY LIST)

(a) Enter the following menus: Body Electrical / Smart Key / Utility / Operation History / Certification ECU operation log of ID code registration.

Body Electrical > Smart Key > Utility

Tester Display

Operation History

Certification ECU operation log of ID code registration:

Parameter Name

Detection Condition

Trouble Area

Proceed to

Failed Registration Mode

  • A registration request was sent while in another mode.
  • During registration a different registration request was sent.

Certification ECU (smart key ECU assembly)

A

Vehicle ID not set

A vehicle ID has not been registered in the certification ECU (smart key ECU assembly).

Certification ECU (smart key ECU assembly)

B

Key Registration Max

A registration request was sent when the maximum number of electrical key transmitter sub-assemblies has already been registered.

  • Certification ECU (smart key ECU assembly)

B

Vehicle Speed Too High

(This applies only when registration fails even though the vehicle is stationary. Make sure that the vehicle is stationary first.)

A registration request was sent with a vehicle speed of 5 km/h (3 mph) or more.

Certification ECU (smart key ECU assembly)

C

No ECU Response

The steering lock ECU (steering lock actuator with ECU assembly) was not connected.

  • Certification ECU (smart key ECU assembly)
  • Steering lock ECU (steering lock actuator with ECU assembly)

D

L Code Verification Error

  • The L codes registered in the certification ECU (smart key ECU assembly) and steering lock ECU (steering lock actuator with ECU assembly) did not match.
  • Certification ECU (smart key ECU assembly)
  • Steering lock ECU (steering lock actuator with ECU assembly)

E

Key Verification: Max Number

  • The number of electrical key transmitter sub-assemblies registered in the certification ECU (smart key ECU assembly) was more than 7.

Certification ECU (smart key ECU assembly)

B

Key Verification: Amp Abnormal

Malfunction of the immobiliser amplifier, such as a short to ground.

  • Certification ECU (smart key ECU assembly)
  • Engine switch

F

Key Verification: Read Error

Although a registered electrical key transmitter sub-assembly was held near the engine switch, immobiliser function certification was not successful.

  • Certification ECU (smart key ECU assembly)
  • Electrical key transmitter sub-assembly

G

Unverified Key

Although all of the registered electrical key transmitter sub-assemblies had been held near the engine switch, electrical key transmitter sub-assembly registration was not possible due to immobiliser function certification not being successful.

  • Certification ECU (smart key ECU assembly)
  • Electrical key transmitter sub-assembly

H

Transponder Key Amp Error

Malfunction of the immobiliser amplifier, such as a short to ground.

  • Certification ECU (smart key ECU assembly)
  • Engine switch

F

New Key Registration Error

Although an unregistered electrical key transmitter sub-assembly was held near the engine switch, electrical key transmitter sub-assembly registration was not possible due to immobiliser function certification not being successful.

  • Certification ECU (smart key ECU assembly)
  • Electrical key transmitter sub-assembly

I

New Key Vehicle ID Error

Although an unregistered electrical key transmitter sub-assembly was held near the engine switch, electrical key transmitter sub-assembly registration was not possible due to the vehicle ID not being stored successfully.

  • Certification ECU (smart key ECU assembly)
  • Electrical key transmitter sub-assembly

I

New Key Registration Failed

After successful immobiliser function certification, time expired before smart recognition completion confirmation or a registration cancellation request was sent.

  • Certification ECU (smart key ECU assembly)
  • Electrical key transmitter sub-assembly

I

New Key Already Registered

Although a registered electrical key transmitter sub-assembly was held near the engine switch, time expired or a registration cancellation request was sent.

Certification ECU (smart key ECU assembly)

J

New Key ID Code Error

Electrical key transmitter sub-assembly registration was not possible due to the certification ECU (smart key ECU assembly) not being able to store the information of the electrical key transmitter sub-assembly to EEPROM correctly.

Certification ECU (smart key ECU assembly)

B

No Response Registering L/S Code

  • The certification ECU (smart key ECU assembly) or steering lock ECU (steering lock actuator with ECU assembly) was not connected.
  • Certification ECU (smart key ECU assembly)
  • Steering lock ECU (steering lock actuator with ECU assembly)

D

L Code Verification NG

  • The L code could not be stored by the steering lock ECU (steering lock actuator with ECU assembly).
  • Certification ECU (smart key ECU assembly)
  • Steering lock ECU (steering lock actuator with ECU assembly)

E

Key Number Write Error

The certification ECU (smart key ECU assembly) could not store the number of electrical key transmitter sub-assemblies to EEPROM.

Certification ECU (smart key ECU assembly)

B

New Key ID Registration Stopped (Security Access Malfunction)

Communication error

Communication error between the Techstream and key registration server

K

New Key ID Registration Stopped (Certification ECU Type Malfunction)

The electrical key transmitter sub-assembly is not compatible with the certification ECU (smart key ECU assembly).

Certification ECU (smart key ECU assembly)

B

New Key ID Registration Stopped (Key Type Malfunction)

The electrical key transmitter sub-assembly is not compatible with the registration mode or certification ECU (smart key ECU assembly).

Electrical key transmitter sub-assembly

L

B

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

C

GO TO STEP 5

D

CHECK FOR DTC B2785

E

GO TO STEP 6

F

CHECK FOR DTC B278A or B2784

G

GO TO STEP 7

H

GO TO STEP 11

I

GO TO STEP 13

J

NEW KEY REGISTRATION FAILED, CHECK THE KEY

(a) Check if a registered electrical key transmitter sub-assembly was held near the engine switch instead of an unregistered electrical key transmitter sub-assembly by mistake.

(b) Perform registration again using an unregistered electrical key transmitter sub-assembly. If the same problem occurs again, replace the certification ECU (smart key ECU assembly).

K

RETRY THE REGISTRATION PROCEDURE

L

REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY

A

4.

CHECK REGISTRATION MODE

(a) Make sure that another mode or different registration mode is not selected.

OK:

Another mode or a different registration mode is not selected.

HINT:

If any mode has been selected, it is necessary to cancel the mode.

OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

PERFORM REREGISTRATION

5.

READ VALUE USING TECHSTREAM (VEHICLE SPEED METER)

(a) Enter the following menus: Body Electrical / Combination Meter / Data List.

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

Body Electrical > Combination Meter > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Vehicle Speed Meter

Vehicle speed

Min.: 0 km/h (0 mph), Max.: 255 km/h (158 mph)

Almost same as actual vehicle speed

-

Body Electrical > Combination Meter > Data List

Tester Display

Vehicle Speed Meter

OK:

"0 km/h (0 mph)" is displayed when the vehicle is stationary.

OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

GO TO METER / GAUGE SYSTEM

6.

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(a) Temporarily replace the certification ECU (smart key ECU assembly) with a new one and register the electrical key transmitter sub-assemblies.

Click here 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL

HINT:

Refer to Registration.

Click here 2021 MY RAV4 [08/2020 - 12/2021]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION

OK:

All of the electrical key transmitter sub-assemblies could be registered to the new certification ECU (smart key ECU assembly) successfully.

OK

END (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) WAS DEFECTIVE)

NG

REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR WITH ECU ASSEMBLY)

7.

CHECK ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY

(a) Make sure that a registered electrical key transmitter sub-assembly is being used.

OK:

A registered electrical key transmitter sub-assembly is being used.

NG

USE A REGISTERED ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY AND PERFORM REREGISTRATION

OK

8.

CHECK NUMBER OF REGISTERED ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLIES

(a) Check the number of registered electrical key transmitter sub-assemblies.

Result

Proceed to

Only one electrical key transmitter sub-assembly is registered

A

2 or more electrical key transmitter sub-assemblies are registered

B

A

GO TO STEP 10

B

9.

REREGISTRATION

(a) Reregister the electrical key transmitter sub-assemblies using different order combinations.

HINT:

  • Refer to Registration.

    Click here 2021 MY RAV4 [08/2020 - 12/2021]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION

  • If there are 2 or more electrical key transmitter sub-assemblies, make sure that the number of order combinations is the same as the number of electrical key transmitter sub-assemblies so that each transmitter can be checked first.

Example: When there are 3 registered electrical key transmitter sub-assemblies (A, B and C).

Combination

Order*

1

A → B → C

2

B → C→ A

3

C → A → B

  • *: Except for the first electrical key transmitter sub-assembly, the remaining electrical key transmitter sub-assemblies can be checked in any order.

OK:

"Key Verification: Read Error" is not displayed.

OK

REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY (ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY HELD WHEN "Key Verification: Read Error" WAS DETECTED WAS DEFECTIVE)

NG

10.

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(a) Temporarily replace the certification ECU (smart key ECU assembly) with a new one and register the electrical key transmitter sub-assemblies.

Click here 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL

HINT:

Refer to Registration.

Click here 2021 MY RAV4 [08/2020 - 12/2021]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION

OK:

All of the electrical key transmitter sub-assemblies could be registered to the new certification ECU (smart key ECU assembly) successfully.

OK

END (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) WAS DEFECTIVE)

NG

REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY

11.

CHECK FOR ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY

(a) Check that all registered electrical key transmitter sub-assemblies are available.

OK:

No registered electrical key transmitter sub-assemblies are missing.

NG

ERASE ALL REGISTERED ELECTRICAL KEY TRANSMITTERS EXCEPT ONE, THEN REGISTER THE REMAINING ELECTRICAL KEY TRANSMITTERS

OK

12.

REREGISTRATION

(a) Register the electrical key transmitter sub-assemblies using different order combinations.

HINT:

  • Refer to Registration.

    Click here 2021 MY RAV4 [08/2020 - 12/2021]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION

  • If there are 2 or more electrical key transmitter sub-assemblies, make sure that the number of order combinations is the same as the number of electrical key transmitter sub-assemblies so that each transmitter can be checked first.

Example: When there are 3 registered electrical key transmitter sub-assemblies (A, B and C).

Combination

Order*

1

A → B → C

2

B → C → A

3

C → A → B

  • *: Except for the first electrical key transmitter sub-assembly, the remaining electrical key transmitter sub-assemblies can be checked in any order.

OK:

"Key Verification: Read Error" is not displayed.

OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY (ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY HELD WHEN "Key Verification: Read Error" WAS DETECTED WAS DEFECTIVE)

13.

REREGISTRATION

(a) Using an unregistered electrical key transmitter sub-assembly, register the ID.

HINT:

Refer to Registration.

Click here 2021 MY RAV4 [08/2020 - 12/2021]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION

OK:

The key ID can be registered.

OK

END (ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY WAS DEFECTIVE)

NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)