Operation CHARM: Car repair manuals for everyone.
Home >> Lexus >> 2011 >> IS 250C V6-2.5L (4GR-FSE) >> Repair and Diagnosis >> Accessories and Optional Equipment >> Antitheft and Alarm Systems >> Testing and Inspection >> Programming and Relearning >> Engine Immobilizer System

Engine Immobilizer System





THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILIZER SYSTEM: REGISTRATION

1. DESCRIPTION OF CODE REGISTRATION

HINT
* The ID codes are the same as recognition codes for the wireless transmitter and the engine immobilizer function. Registering an ID code enables the smart access system with push-button start, the wireless door lock control function and the engine immobilizer function to be operated.
* Code registration is necessary when the certification ECU (smart key ECU assembly), ID code box (immobilizer code ECU), steering lock ECU (steering lock actuator assembly) or key is replaced with a new one.
* The key (for card type) can be registered using the same procedure as the key (for standard).

(a) Vehicles with the smart access system with push-button start do not have a key slot. Therefore, hold the key close to the engine switch to register the key, as shown in the illustration.





2. KEY REGISTRATION PROCEDURES WHEN ADDING OR REPLACING KEY OR WHEN KEY IS LOST

HINT
* The following procedures require the use of the Techstream:
* - New key ID registration
* - Additional key ID registration
* - Key ID erasure
* A maximum of 7 keys can be registered.





3. PART REPLACEMENT AND KEY REGISTRATION

(a) The following table shows ECU replacement and key registration procedures for cases in which a malfunctioning ECU has been identified through the troubleshooting of the smart access system with push-button start.

HINT
* The following procedures can be performed:
* New key ID registration
* Additional key ID registration
* Key ID erasure
* All key ID erasure
* ECU code registration
* If the customer has not brought all the registered keys, replacement of the ID code box (immobilizer code ECU) is also required.
* A maximum of 7 keys can be registered.









4. KEY REGISTRATION

(a) PROCEDURE "A"

New key ID registration (when replacing the certification ECU (smart key ECU assembly) and ID code box (immobilizer code ECU), or when replacing the certification ECU (smart key ECU assembly), ID code box (immobilizer code ECU) and steering lock ECU (steering lock actuator assembly))





*1: Repeat this process for each key which is to be registered for the vehicle. Finish the procedure for each key within 30 seconds. If the procedure for any of the keys has not been finished within the specified time, perform the registration procedures again from process 1. Make sure that only 1 key is in the cabin during the registration procedures. If 2 or more keys are in the cabin simultaneously, electric waves will interfere with each other, preventing normal registration.

(b) PROCEDURE "B"

New key ID registration (when replacing the certification ECU (smart key ECU assembly))





*1: Repeat this process for each key which is not be registered for the vehicle. Finish the procedure for each key within 30 seconds. If the procedure for any of the keys has not been finished within the specified time, perform the registration procedures again from process 1. If the key confirmation procedure for a key is performed, the security indicator light comes on and remains on until all the keys are confirmed.

*2: Repeat this process for each key which is to be registered for the vehicle. Finish the procedure for each key within 30 seconds. If the procedure for any of the keys has not been finished within the specified time, perform the registration procedures again from process 1. Make sure that only 1 key is in the cabin during the registration procedures. If 2 or more keys are in the cabin simultaneously, electric waves will interfere with each other, preventing normal registration.

(c) PROCEDURE "C"

Additional key ID registration





*1: Perform this process for one of the keys which are to be registered for the vehicle. Finish the procedure within 30 seconds. If the procedure has not been finished within the specified time, perform the registration procedures again from process 1.

*2: Repeat this process for each key which is to be registered for the vehicle. Finish the procedure for each key within 30 seconds. If the procedure for any of the keys has not been finished within the specified time, perform the registration procedures again from process 1. Make sure that only 1 key is in the cabin during the registration procedures. If 2 or more keys are in the cabin simultaneously, electric waves will interfere with each other, preventing normal registration.

(d) PROCEDURE "D"

Key ID erasure

HINT
Procedure "D" erases all registered key codes except one.

NOTICE:
Do not erase all registered key codes except one key (for card type) while the smart access system with push-button start system key cancel is activated. By doing so, the smart access system with push-button start system cannot be returned to its original condition using the key cancel operation Smart Access System With Push-Button Start (for Entry Function). In addition, the entry unlock switching function Smart Access System With Push-Button Start (for Entry Function) cannot be used. However, erasing all registered key codes except one key (for card type) will not cause problems if registering additional keys (for standard).





*1: Perform this process for one of the keys which are to be registered for the vehicle. Finish the procedure within 30 seconds. If the procedure has not been finished within the specified time, perform the erasure procedures again from process 1.

(e) PROCEDURE "E"

All key ID erasure

HINT
Procedure "E" erases all the key codes registered in the vehicle.





(f) PROCEDURE "F"

ECU code registration





*1: Perform this process for one of the keys which are to be registered for the vehicle. Finish the procedure within 30 seconds. If the procedure has not been finished within the specified time, perform the erasure procedures again from process 1.

(g) PROCEDURE "G"

ECU communication ID registration

NOTICE:
* The ECU communication ID should be registered when the ID code box (immobilizer code ECU) is replaced in order to match these ECU communication IDs.
* The engine cannot be started unless the ECU communication IDs match.
* After the registration, pressing the engine switch may not start the engine on the first try. If so, press the engine switch again.
* Clear DTC B2799 (code for ECM immobilizer communication error) by either of the following:
- Use the Techstream.
- Disconnect the cable from the negative (-) battery terminal for 30 seconds.

(1) Using SST, connect terminals TC and CG of the DLC3.

SST : 09843-18040





(2) Turn the engine switch on (IG) and leave it as is for 30 minutes.

HINT
Do not start the engine.

(3) Turn the engine switch off and disconnect terminals TC and CG.

(4) Check that the engine starts and stays running for more than 3 seconds.
pro multis · About Operation CHARM