Toyota Yaris: Smart Key System (for Start Function) / Additional Key cannot be Registered

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Vehicle Interior / Theft Deterrent / Keyless Entry / Smart Key System (for Start Function) / Additional Key cannot be Registered

DESCRIPTION

If additional registration is not possible, a malfunction of the electrical key transmitter sub-assembly, certification ECU (smart key ECU assembly), engine switch, No. 1 indoor electrical key antenna assembly (front floor), steering lock ECU (steering lock actuator or upper bracket assembly), smart door control receiver assembly is suspected.

CAUTION / NOTICE / HINT

NOTICE:

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

    Click here

  • When using the GTS with the ignition switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key. While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS 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

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

    Click here

  • After repair, confirm that no DTCs are output.

HINT:

When additional registration is not possible, freeze frame data may be stored in the certification ECU (smart key ECU assembly).

Click here

PROCEDURE

1.

CHECK FOR DTC

(a) Check for DTCs.

Body Electrical > Smart Key > Trouble Codes

NOTICE:

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

OK:

DTCs are not output.

NG

GO TO DIAGNOSTIC TROUBLE CODE CHART

OK

2.

READ VALUE USING GTS (VEHICLE ID DIFFERENCE (KEY REGISTRATION))

(a) Read the Data List according to the display on the GTS.

Body Electrical > Smart Key > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Vehicle ID Difference (Key Registration)

Status of vehicle ID (key registration)

No or Yes

No: Vehicle ID normal (key registration)

Yes: Vehicle ID malfunction (key registration)

-

Body Electrical > Smart Key > Data List

Tester Display

Vehicle ID Difference (Key Registration)

Result

Proceed to

"No" is displayed

A

"Yes" is displayed

B

B

GO TO STEP 6

A

3.

READ VALUE USING GTS (VEHICLE CONTROL HISTORY (ROB))

(a) Read the Vehicle Control History (RoB) according to the display on the GTS.

Body Electrical > Smart Key > Utility

Tester Display

Vehicle Control History (RoB)

Registration Function (Reason for Non-operation):

Parameter Name

Detection Condition

Trouble Area

New Key ID Registration Stopped (Security Access Malfunction)

Communication error

Communication error between the GTS and key registration server

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)

New Key ID Registration Stopped (Key Type Malfunction 1)

The electrical key transmitter sub-assembly is not compatible with the registration mode.

Electrical key transmitter sub-assembly

New Key ID Registration Stopped (Key Type Malfunction 2)

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

Electrical key transmitter sub-assembly

Result

Proceed to

Vehicle control history related to operation malfunction does not exist

A

"New Key ID Registration Stopped (Security Access Malfunction)" is displayed on the GTS

B

"New Key ID Registration Stopped (Certification ECU Type Malfunction)" is displayed on the GTS

C

"New Key ID Registration Stopped (Key Type Malfunction 1)" is displayed on the GTS

D

"New Key ID Registration Stopped (Key Type Malfunction 2)" is displayed on the GTS

B

PERFORM REREGISTRATION

C

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

D

REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY

A

4.

CHECK SMART KEY SYSTEM (for Start Function)

(a) Remove the transmitter battery from the electrical key transmitter sub-assembly.

(b) With the brake pedal depressed, hold the electrical key transmitter sub-assembly near the engine switch and check if the power source mode changes.

OK:

The power source mode changes.

HINT:

If the power source mode changes, the cabin verification is malfunctioning.

*1

Engine Switch

*2

Electrical Key Transmitter Sub-assembly

Result

Proceed to

The power source mode changes

A

The power source mode does not change

B

B

GO TO SMART KEY SYSTEM (for Start Function) (Power Source Mode does not Change to ON (IG and ACC))

A

5.

CHECK STEERING LOCK FUNCTION

(a) The ignition switch is ACC or ON.

(b) Check that the steering unlocks.

HINT:

Check that the communication between the steering lock ECU (steering lock actuator or upper bracket assembly) and certification ECU (smart key ECU assembly) is normal.

OK:

The steering unlocks.

NG

GO TO SMART KEY SYSTEM (for Start Function) (Unable to Unlock Steering Wheel (Engine cannot Start))

OK

6.

REGISTRATION

(a) Using an unregistered electrical key transmitter sub-assembly, perform the additional registration procedure.

OK:

Additional registration can be completed.

OK

REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY ((FIRST REGISTERED KEY WAS DEFECTIVE))

NG

7.

REPLACE 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.

HINT:

  • For replacement.

    Click here

  • For registration.

    Click here

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

GO TO OTHER PROBLEM (New Key cannot be Registered)

    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), ID code box (immobiliser code ECU), electrical key transmitter sub-assembly, steering lock ECU (steering lock actuator or upper bracket assembly), smart door control receiver assembly is suspected...

    New Key Registration Warning Message is not Displayed

    DESCRIPTION If the new key registration warning message is not displayed after an electrical key transmitter sub-assembly has been registered, there may be communication problem between the certification ECU (smart key ECU assembly) and combination meter assembly (meter ECU)...

    Other information:

    Toyota Yaris XP210 (2020-2022) Reapir and Service Manual: Operation Check


    OPERATION CHECK AUTOMATIC LIGHT CONTROL SYSTEM OPERATION CHECK NOTICE: Make sure that the customize settings are set to default when performing the automatic light control system operation check. Click here (a) Turn the ignition switch to ON. (b) Turn the light control switch to the AUTO position...

    Toyota Yaris XP210 (2020-2022) Reapir and Service Manual: Driver Side Door Entry Lock Function does not Operate


    DESCRIPTION If the entry lock function does not operate for the driver door only, but the entry unlock function operates, the request code is being transmitted properly from the driver door. In this case, there may be a problem related to the lock sensor (connection between the certification ECU (smart key ECU assembly) and front door outside handle assembly LH)...

    Categories

    Front Seat Belt Pretensioners

    The front seat belt pretensioners are designed to deploy in moderate or severe frontal, near frontal collisions.

    In addition, the pretensioners operate when a side collision or a rollover accident is detected. The pretensioners operate differently depending on what types of air bags are equipped. For more details about the seat belt pretensioner operation, refer to the SRS Air Bag Deployment Criteria.

    read more

     
    Copyright © 2022 www.toyaris4.com