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 or upper bracket 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 
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.
- The certification ECU (smart key ECU assembly) and steering lock ECU
(steering lock actuator or upper bracket assembly) have been replaced.
WIRING DIAGRAM
 CAUTION / NOTICE / HINT
NOTICE:
- New registration mode can be entered only when no electrical key
transmitter sub-assemblies are stored in the certification ECU (smart
key ECU assembly).
- The smart key system (for Start Function, Gasoline Model) 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, Gasoline Model)
after confirming that the communication systems are functioning
properly.
Click here
- 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.
- Before replacing the electrical key transmitter sub-assembly,
certification ECU (smart key ECU assembly) or steering lock ECU
(steering lock actuator or upper bracket assembly), refer to
Registration.
Click here
- Inspect the fuses for circuits related to this system before performing the following procedure.
- After repair, confirm that no DTCs are output.
PROCEDURE (a) 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) 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. 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 |
HINT: A new certification ECU (smart key ECU assembly) will be have no electrical key transmitter sub-assemblies registered.
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) 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 / Utility /
Operation History / Registration Function (Reason for Non-operation). Body Electrical > Smart Key > Utility
|
Tester Display | | Operation History |
(e) Check the freeze frame data. Registration Function (Reason for Non-operation):
|
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 is sent when the maximum number of electrical key transmitter sub-assemblies has already been registered. |
Certification ECU (smart key ECU assembly) |
C | | 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 is sent with a vehicle speed of 5 km/h or more. |
Certification ECU (smart key ECU assembly) |
D | | No ECU Response |
The steering lock ECU (steering lock actuator or upper bracket assembly) was not connected. |
- Certification ECU (smart key ECU assembly)
- Steering lock ECU (steering lock actuator or upper bracket assembly)
| E | |
L Code Verification Error | The
L codes registered in the certification ECU (smart key ECU assembly)
and steering lock ECU (steering lock actuator or upper bracket assembly)
did not match. |
- Certification ECU (smart key ECU assembly)
- Steering lock ECU (steering lock actuator or upper bracket assembly)
| F | |
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) |
C | | Key Verification: Amp Abnormal |
Malfunction of the immobiliser amplifier, such as a short to ground. |
- Certification ECU (smart key ECU assembly)
- Engine switch
| G | |
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
| H | |
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
| I | |
Transponder Key Amp Error | Malfunction of the immobiliser amplifier, such as a short to ground. |
- Certification ECU (smart key ECU assembly)
- Engine switch
| G | |
New Key Registration Error | Although
an unregistered electrical key transmitter sub-assembly was held near
the engine switch, electrical key transmitter sub-assembly registration
is not possible due to immobiliser function certification not being
successful. |
- Certification ECU (smart key ECU assembly)
- Electrical key transmitter sub-assembly
| J | |
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
is not possible due to the vehicle ID not being stored successfully. |
- Certification ECU (smart key ECU assembly)
- Electrical key transmitter sub-assembly
| J | |
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
| J | |
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) |
K | | 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 or upper bracket assembly) was not connected. |
- Certification ECU (smart key ECU assembly)
- Steering lock ECU (steering lock actuator or upper bracket assembly)
| E | |
L Code Verification NG | The L code could not be stored by the steering lock ECU (steering lock actuator or upper bracket assembly). |
- Certification ECU (smart key ECU assembly)
- Steering lock ECU (steering lock actuator or upper bracket assembly)
| F | |
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 | | ID Code BOX Write Error |
The
certification ECU (smart key ECU assembly) could not store the
information of whether the ID code box was provided in the vehicle to
EEPROM. | Certification ECU (smart key ECU assembly) |
B |
| B |
| REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
| C |
| REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
| D |
| GO TO STEP 5 |
| E |
| CHECK FOR DTC B2785 |
| F |
| GO TO STEP 6 |
| G |
| CHECK FOR DTC B278A or B2784 |
| H |
| GO TO STEP 7 |
| I |
| GO TO STEP 11 |
| J |
| GO TO STEP 13 |
| K |
| NEW KEY REGISTRATION FAILED, CHECK THE KEY |
|
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) 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 / Combination Meter / Data List.
(e) 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, Max.: 255 | Almost same as actual vehicle speed (Speedometer tester) |
- | 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. |
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 |
| REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET 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 | |
| |
(a) Reregister the electrical key transmitter sub-assemblies using different order combinations.
Click here HINT: 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. |
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 |
| 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 | |
| |
(a) Register the electrical key transmitter sub-assemblies using different order combinations.
Click here HINT: 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) |
(a) Using an unregistered electrical key transmitter sub-assembly, register the ID.
Click here OK: The key ID can be registered.
| OK |
| END (ELECTRICAL KEY TRANSMITTER WAS DEFECTIVE) |
| NG |
| REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) | | 
