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.
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:WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Click here
Click here
PROCEDURE
1. | CHECK FOR DTC |
(a) Check for DTCs.
Body Electrical > Smart Key > Trouble CodesNOTICE:
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 |
|
2. | READ VALUE USING GTS (NUMBER OF REGISTERED KEY CODES) |
(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 |
---|---|---|---|---|
Number of Registered Key Codes | Number of registered electrical key transmitter sub-assemblies | 0 to 4 | Number of registered electrical key transmitter sub-assemblies | Up to 4 electrical key transmitter sub-assemblies can be registered. |
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 GTS display.
NG |
![]() | REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
|
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 | Proceed to |
---|---|---|---|
Cannot Enter Registration Mode |
| Certification ECU (smart key ECU assembly) | A |
Cannot Enter Registration Mode (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 |
Registration Limit | A registration request is sent when the maximum number of electrical key transmitter sub-assemblies has already been registered. |
| L |
Cannot Enter Registration Mode (ID Code Box Availability Not Confirmed) | A registration request was sent even though the existence of an ID code box is unknown. |
| M |
Cannot Enter Registration Mode (Vehicle Speed > 5 km/h) (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 (3 mph) or more. | Certification ECU (smart key ECU assembly) | C |
ECU Code Confirmation Failed (No Response from Connected ECUs) | The steering lock ECU (steering lock actuator or upper bracket assembly) was not connected. |
| D |
ECU Code Confirmation Failed (L Code Certification Failed) | The L codes registered in the ID code box (immobiliser code ECU) and steering lock ECU (steering lock actuator or upper bracket assembly) did not match. |
| N |
ECU Code Confirmation Failed (L Code Succeeded, S Code Failed) | L code verification was successful but the S code stored in the ID code box (immobiliser code ECU) and certification ECU (smart key ECU assembly) did not match. |
| L |
ECU Code Confirmation Failed (Too Many Keys Registered in ID Code Box) | The number of electrical key transmitter sub-assemblies registered in the ID code box (immobiliser code ECU) was more than 4. | ID code box (immobiliser code ECU) | O |
Confirmation Failed for All Registered Keys (Immobilizer Certification Failed) | All of the registered electrical key transmitter sub-assemblies were incorrectly held near the engine switch and the certification ECU (smart key ECU assembly) could not complete verification. |
| F |
Confirmation Failed for All Registered Keys (Some Keys Unconfirmed) | 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. |
| G |
Confirmation Failed for All Registered Keys (Key Information Malfunction) | All of the registered electrical key transmitter sub-assemblies were held near the engine switch, but key ID information was not stored by the certification ECU (smart key ECU assembly). | Key registration failure | E |
New Key ID Registration Failed (Immobilizer Certification Failed) | 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. |
| E |
New Key ID Registration Failed (Vehicle ID did not Match) | 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. |
| H |
New Key ID Registration Failed (Conditions Other than Vehicle ID not Met) | After successful immobiliser function certification, time expired before smart recognition completion confirmation or a registration cancellation request was sent. |
| H |
New Key ID Registration Failed (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) | I |
New Key ID Registration Failed (ID Code Writing Failed) | 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 |
New Key ID Registration Failed (Key Information Malfunction) | An unregistered electrical key transmitter sub-assembly was held near the engine switch, but key ID information was not stored by the certification ECU (smart key ECU assembly). | Key registration failure | H |
No Response from Connected ECUs when Registering L/S Codes | The certification ECU (smart key ECU assembly), ID code box (immobiliser code ECU) or steering lock ECU (steering lock actuator or upper bracket assembly) was not connected. |
| D |
S Code Registration Failed (Certification ECU, ID Code Box) | The S code could not be stored by the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU). |
| L |
L Code Registration Failed (ID Code Box, Steering Lock ECU) | The L code could not be stored by the steering lock ECU (steering lock actuator or upper bracket assembly) or ID code box (immobiliser code ECU). |
| N |
ECU ID Verification Error | The code received from the ID code box (immobiliser code ECU) when the S code is registered does not match the code of the certification ECU (smart key ECU assembly). |
| L |
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 (immobiliser code ECU) was provided in the vehicle to EEPROM. | Certification ECU (smart key ECU assembly) | B |
New Key ID Registration Stopped (Security Access Malfunction) | Communication error | Communication error between the GTS and key registration server | J |
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 1) | The electrical key transmitter sub-assembly is not compatible with the registration mode. | Electrical key transmitter sub-assembly | K |
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 | K |
B |
![]() | REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
C |
![]() | GO TO STEP 5 |
D |
![]() | CHECK FOR DTC B278588 |
E |
![]() | CHECK FOR DTC B27841C, B278E87 |
F |
![]() | GO TO STEP 6 |
G |
![]() | GO TO STEP 10 |
H |
![]() | GO TO STEP 12 |
I |
![]() | NEW KEY REGISTRATION FAILED, CHECK THE KEY |
J |
![]() | PERFORM REREGISTRATION |
K |
![]() | REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY |
L |
![]() | GO TO STEP 13 |
M |
![]() | CHECK FOR DTC B278987 |
N |
![]() | GO TO STEP 14 |
O |
![]() | REPLACE ID CODE BOX (IMMOBILISER CODE ECU) |
|
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 GTS (VEHICLE SPEED METER) |
(a) Read the Data List according to the display on the GTS.
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) | - |
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 FOR REGISTERD 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 |
|
7. | 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 9 |
|
8. | REREGISTRATION |
(a) Reregister the electrical key transmitter sub-assemblies using different order combinations.
HINT:
Click here
Combination | Order* |
---|---|
1 | A → B → C |
2 | B → C→ A |
3 | C → A → B |
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) |
|
9. | 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:
Click here
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 |
10. | 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 |
|
11. | REREGISTRATION |
(a) Register the electrical key transmitter sub-assemblies using different order combinations.
HINT:
Click here
Combination | Order* |
---|---|
1 | A → B → C |
2 | B → C→ A |
3 | C → A → B |
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) |
12. | PERFORM REREGISTRATION |
(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) |
13. | 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.
HINT:
Click here
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 ID CODE BOX (IMMOBILISER CODE ECU) |
14. | 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.
HINT:
Click here
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) |
|
15. | CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) |
(a) Temporarily replace the steering lock ECU (steering lock actuator or upper bracket assembly) with a new one and register the electrical key transmitter sub-assemblies.
Click here
OK:
All of the electrical key transmitter sub-assemblies could be registered to the new steering lock ECU (steering lock actuator or upper bracket assembly) successfully.
OK |
![]() | END (STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) WAS DEFECTIVE) |
NG |
![]() | REPLACE ID CODE BOX (IMMOBILISER CODE ECU) |
Automatic transaxle: Shift the selector lever to the P position and set the parking brake.
Press the push button start to turn off the engine. The ignition position is off.