THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): Additional Key cannot be Registered; 2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018

Last Modified: 07-31-2024	6.11:8.1.0	Doc ID: RM100000001CY5Z
Model Year Start: 2019	Model: GR Corolla	Prod Date Range: [06/2018 - 09/2022]
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): Additional Key cannot be Registered; 2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022]

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) or door control receiver 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 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
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).

If freeze frame data is available, it can be helpful in determining whether any parts were malfunctioning or not or narrowing down the suspected areas based on the table below.

Certification ECU Log of ID Code Registration

Parameter Name	Cause of Problem and Countermeasure
Failed Registration Mode	Make sure that another mode or a different registration mode is not selected, and then perform registration again.
Key Registration Max	Registration was not possible because the maximum number of the electrical key transmitter sub-assemblies has already been registered to the certification ECU (smart key ECU assembly). If a new electrical key transmitter sub-assembly needs to be registered, such as when one of the registered electrical key transmitter sub-assemblies has been lost, erase an unnecessary ID code first.
Key Verification: Amp Abnormal	Although a registered electrical key transmitter sub-assembly was held near the engine switch, electrical key transmitter sub-assembly registration could not be confirmed due to a malfunction of the immobiliser amplifier, such as a short to ground. DTC B278A or B2784 was stored.
Key Verification: Read Error	A registered electrical key transmitter sub-assembly was not held near the engine switch properly or electrical key transmitter sub-assembly registration cannot be confirmed due to wave interference, etc. Register the electrical key transmitter sub-assembly using the correct procedure or use another registered electrical key transmitter sub-assembly.
Transponder Key Amp Abnormal	Although an unregistered electrical key transmitter sub-assembly was held near the engine switch, electrical key transmitter sub-assembly registration cannot be completed due to a malfunction of the immobiliser amplifier, such as a short to ground. DTC B278A or B2784 was stored.
New Key Registration Error	An unregistered electrical key transmitter sub-assembly was not held near the engine switch properly or electrical key transmitter sub-assembly registration cannot be confirmed due to a malfunction, such as wave interference. Reregister the electrical key transmitter sub-assembly using the correct procedure or use another registered electrical key transmitter sub-assembly.
New Key Vehicle ID Error	Although the vehicle ID stored in the certification ECU (smart key ECU assembly) should be registered to the electrical key transmitter sub-assembly during electrical key transmitter sub-assembly registration, it was not successful. Use another unregistered electrical key transmitter sub-assembly for registration.
New Key Registration Failed	Although an unregistered electrical key transmitter sub-assembly was held near the engine switch for registration, electrical key transmitter sub-assembly registration was not successful due to wave interference (such as radio waves emitted from a device in the cabin) or a low transmitter battery.
New Key Already Registered	As a registered electrical key transmitter sub-assembly was held near the engine switch by mistake, electrical key transmitter sub-assembly registration was not successful. Using an unregistered electrical key transmitter sub-assembly, perform the registration procedure again.
New Key ID Code Error	Replace the certification ECU (smart key ECU assembly).
New Key Information Abnormal	The ID code of an electrical key transmitter sub-assembly could not be registered to the certification ECU (smart key ECU assembly). If 2 electrical key transmitter sub-assemblies are held near the engine switch at the same time, incorrect registration information will be stored in the certification ECU (smart key ECU assembly), suspending registration. Reregister the electrical key transmitter sub-assembly using the correct registration procedure.

Body Electrical > Smart Key > Utility

Tester Display
Operation History

PROCEDURE

1.	READ VALUE USING TECHSTREAM (UNMATCHED VEHICLE-ID)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG)

(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

Unmatched Vehicle-ID

Key No. (incorrect or correct)

No or Yes

No: Communication normal

Yes: Communication malfunction

The vehicle ID registered in the vehicle and the vehicle ID registered in the electrical key transmitter sub-assembly are different (if a key from another vehicle is brought into the vehicle exterior detection area while the doors are locked, "Yes" is displayed for "Unmatched Vehicle-ID" in the Data List).

Other potential causes:

An electrical key transmitter sub-assembly from a different vehicle is being used.
A communication error due to wave interference.
The electrical key transmitter sub-assembly or certification ECU (smart key ECU assembly) is malfunctioning.

Body Electrical > Smart Key > Data List

Tester Display
Unmatched Vehicle-ID

Result	Proceed to
"No" is displayed	A
"Yes" is displayed	B

GO TO STEP 5

2.	READ VALUE USING TECHSTREAM (OPERATION HISTORY)

(a) Check that the connectors are properly connected to the vehicle and Techstream.

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) 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

(f) Check the freeze frame data.

Registration Function (Reason for Non-operation):

Parameter Name	Detection Condition	Trouble Area
New Key ID Registration Stopped (Conditions Other than Vehicle ID not Met)	The key ID information of the certification ECU (smart key ECU assembly) and unregistered key transmitter sub-assembly did not match due to wave interference around the vehicle or depletion of the battery of the key transmitter sub-assembly.	Certification ECU (smart key ECU assembly) Electrical key transmitter sub-assembly
New Key ID Registration Stopped (Key Already Registered)	A registered electrical key transmitter sub-assembly was used.	Incorrect registration procedure is used
New Key ID Registration Stopped (ID Code Writing Failure)	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).	Certification ECU (smart key ECU assembly)
New Key ID Registration Stopped (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).	Incorrect registration procedure is used
Registration Limit	An electrical key transmitter sub-assembly was attempted to be registered when the maximum number of electrical key transmitter sub-assemblies that can be registered has been reached.	Incorrect registration procedure is used
Cannot Enter Registration Mode (Vehicle Speed > 5 km/h)	The vehicle speed was 5 km/h (3.1 mph) or more.	Certification ECU (smart key ECU assembly)
Registered Key Confirmation Failed (Immobilizer Certification Failed)	A registered electrical key transmitter sub-assembly was incorrectly held near the engine switch and the certification ECU (smart key ECU assembly) could not complete verification.	Certification ECU (smart key ECU assembly) Electrical key transmitter sub-assembly
ECU Code Confirmation Failed (No Response from Connected ECUs)	The certification ECU (smart key ECU assembly) did not receive a response from the ID code box (immobiliser code ECU) or steering lock ECU (steering lock actuator or upper bracket assembly).	Certification ECU (smart key ECU assembly) ID code box (immobiliser code ECU)
ECU Code Confirmation Failed (S Code Certification Failed)	The authentication code (S code) of the certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU) did not match.	Certification ECU (smart key ECU assembly) ID code box (immobiliser code ECU)
ECU Code Confirmation Failed (L Code Certification Failed)	The authentication code (L code) of the ID code box (immobiliser code ECU) and steering lock ECU (steering lock actuator or upper bracket assembly) did not match.	Certification ECU (smart key ECU assembly) ID code box (immobiliser code ECU) Steering lock ECU (steering lock actuator or upper bracket assembly)
ECU Code Confirmation Failed (Too Many Keys Registered in ID Code Box)	The maximum number of electrical key transmitter sub-assemblies that can be registered to the ID code box (immobiliser code ECU) has been exceeded.	ID code box (immobiliser code ECU)
New Key ID Registration Failed (Immobilizer Certification Failed)	An unregistered electrical key transmitter sub-assembly was incorrectly held near the engine switch and the certification ECU (smart key ECU assembly) could not complete verification.	Certification ECU (smart key ECU assembly) Electrical key transmitter sub-assembly
New Key ID Registration Failed (Conditions Other than Vehicle ID not Met)	The key ID information of the certification ECU (smart key ECU assembly) and unregistered key transmitter sub-assembly did not match due to wave interference around the vehicle or depletion of the battery of the key transmitter sub-assembly.	Certification ECU (smart key ECU assembly) Electrical key transmitter sub-assembly
New Key ID Registration Failed (Key Already Registered)	A registered electrical key transmitter sub-assembly was used.	Certification ECU (smart key ECU assembly)
New Key ID Registration Failed (ID Code Writing Failed)	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).	Certification ECU (smart key ECU assembly)
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).	Incorrect registration procedure is used
No Response from Connected ECUs when Registering L/S Codes	There are no response from the ID code box (immobiliser code ECU) or steering lock ECU (steering lock actuator or upper bracket assembly) at registration of L code or S code.	Certification ECU (smart key ECU assembly) ID code box (immobiliser code ECU)
L Code Registration Failed (ID Code Box, Steering Lock ECU)	The authentication code (L code) is not registered by the ID code box (immobiliser code ECU) and steering lock ECU (steering lock actuator or upper bracket assembly).	Certification ECU (smart key ECU assembly) ID code box (immobiliser code ECU) Steering lock ECU (steering lock actuator or upper bracket assembly)
S Code Registration Failed (Certification ECU, ID Code Box)	The authentication code (S code) is not registered by the certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU).	ID code box (immobiliser code ECU)
ECU ID Verification Error	The certification ECU (smart key ECU assembly) did not receive S code registration response from the ID code box (immobiliser code ECU).	Certification ECU (smart key ECU assembly) ID code box (immobiliser code ECU)
Key Number Write Error	The number of the electrical key transmitter sub-assemblies are not stored by the certification ECU (smart key ECU assembly).	Certification ECU (smart key ECU assembly)
B Code Registration Failed (Certification ECU, Main Body ECU)	B code was not stored by the certification ECU (smart key ECU assembly).	Main body ECU (multiplex network body ECU) Certification ECU (smart key ECU assembly)
New Key ID Registration Stopped (Security Access Malfunction)	.Communication error	Communication error between the Techstream 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)	The electrical key transmitter sub-assembly is not compatible with the registration mode.	Electrical key transmitter sub-assembly

Result	Proceed to
Vehicle operation history related to operation malfunction does not exist	A
"New Key ID Registration Stopped (Conditions Other than Vehicle ID not Met)" is displayed on the Techstream	B
"New Key ID Registration Failed (Immobilizer Certification Failed)" is displayed on the Techstream
"New Key ID Registration Failed (Conditions Other than Vehicle ID not Met)" is displayed on the Techstream
"New Key ID Registration Stopped (Key Already Registered)" is displayed on the Techstream	C
"New Key ID Registration Stopped (Key Information Malfunction)" is displayed on the Techstream
"New Key ID Registration Failed (Key Information Malfunction)" is displayed on the Techstream
"New Key ID Registration Stopped (ID Code Writing Failure)" is displayed on the Techstream	D
"New Key ID Registration Failed (ID Code Writing Failed)" is displayed on the Techstream	D
"Registration Limit" is displayed on the Techstream	E
"Cannot Enter Registration Mode (Vehicle Speed > 5 km/h)" is displayed on the Techstream	F
"Registered Key Confirmation Failed (Immobilizer Certification Failed)" is displayed on the Techstream	G
"ECU Code Confirmation Failed (No Response from Connected ECUs)" is displayed on the Techstream	H
"No Response from Connected ECUs when Registering L/S Codes" is displayed on the Techstream	H
"ECU Code Confirmation Failed (S Code Certification Failed)" is displayed on the Techstream	I
"ECU ID Verification Error" is displayed on the Techstream	I
"ECU Code Confirmation Failed (L Code Certification Failed)" is displayed on the Techstream	J
"L Code Registration Failed (ID Code Box, Steering Lock ECU)" is displayed on the Techstream	J
"ECU Code Confirmation Failed (Too Many Keys Registered in ID Code Box)" is displayed on the Techstream	K
"S Code Registration Failed (Certification ECU, ID Code Box)" is displayed on the Techstream	K
"New Key ID Registration Failed (Key Already Registered)" is displayed on the Techstream	L
"Key Number Write Error" is displayed on the Techstream	M
"New Key ID Registration Stopped (Certification ECU Type Malfunction)" is displayed on the Techstream	M
"B Code Registration Failed (Certification ECU, Main Body ECU)" is displayed on the Techstream	N
"New Key ID Registration Stopped (Security Access Malfunction)" is displayed on the Techstream	O
"New Key ID Registration Stopped (Key Type Malfunction)" is displayed on the Techstream	P

GO TO STEP 6

PERFORM REREGISTRATION

GO TO STEP 8

END (REGISTRATION NOT FINISHED DUE TO MAXIMUM NUMBER OF REGISTERED ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLIES BEING EXCEEDED)

(a) If another electrical key transmitter sub-assembly needs to be registered, perform "UNDESIGNATED KEY PERMANENT ERASURE" before performing the registration procedure.

Click here

REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

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).

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

GO TO STEP 18

CHECK TECHSTREAM

(a) Check communication between the Techstream and the key registration server.

REREGISTRATION

(a) Replace the electrical key transmitter sub-assembly, register the ID.

Click here

3.	CHECK SMART KEY SYSTEM (for Start Function)

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

(b) With the clutch pedal depressed, hold the electrical key transmitter sub-assembly near the engine switch and check if the power source mode changes.*1

(c) With the brake pedal depressed, hold the electrical key transmitter sub-assembly near the engine switch and check if the power source mode changes.*2

*1: for Manual Transaxle
*2: except Manual Transaxle

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

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

4.	CHECK STEERING LOCK FUNCTION

(a) The engine switch is on (IG).

(b) Check that the steering unlocks.

HINT:

When the engine switch is turned on (ACC) or on (IG) and the electrical key transmitter assembly and certification ECU (smart key ECU assembly) are verified, the steering is unlocked.

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.

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

5.	REGISTRATION

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

Click here

OK:

Additional registration can be completed.

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

GO TO STEP 7

6.	REREGISTRATION

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

Click here

OK:

The key ID can be registered.

END (ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY WAS DEFECTIVE)

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

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.

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

GO TO OTHER PROBLEM (New Key cannot be Registered)

8.	READ VALUE USING TECHSTREAM (OPERATION HISTORY)

(a) Connect the Techstream to the DLC3.

(b) Register the key ID.

Click here

(d) Turn the Techstream on.

(e) 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

(f) Check the freeze frame data.

Result	Proceed to
"New Key ID Registration Stopped (Key Already Registered)" is not displayed on the Techstream	A
"New Key ID Registration Stopped (Key Already Registered)" is displayed on the Techstream	B

END (COMMUNICATION ERROR BETWEEN TECHSTREAM AND VEHICLE)

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

9.	READ VALUE USING TECHSTREAM (VEHICLE SPEED METER)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(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.

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

GO TO METER / GAUGE SYSTEM

10.	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.

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

11.	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

GO TO STEP 13

12.	REREGISTRATION

(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.

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

13.	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.

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

REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY

14.	CHECK FOR DTC

(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:

DTC B2785 is not output.

GO TO DTC B2785

15.	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.

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

REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

16.	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:

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.

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

17.	CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY)

(a) 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.

END (STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) WAS DEFECTIVE)

REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

18.	REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

(a) Temporarily replace the main body ECU (multiplex network body ECU) 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 main body ECU (multiplex network body ECU) successfully.

END (MAIN BODY ECU (MULTIPLEX NETWROK BODY ECU) WAS DEFECTIVE)

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)