Computer Relearn Procedures: Removal & Installation Lexus LS III

ECM/PCM Replacement

ECM/PCM is part of engine immobilizer system. Replacement ECM/PCM must have immobilizer code rewritten, using Honda PGM Tester. To perform rewrite procedure requires the vehicle, all master keys, all valet keys and a Honda PGM Tester with an immobilizer program card. Any key not learned during rewrite will not start vehicle. Follow Honda PGM Tester instructions. For more information, see appropriate IMMOBILIZER SYSTEMS article in ACCESSORIES & EQUIPMENT.

ECM/PCM is part of immobilizer system. Replacement ECM/PCM must have immobilizer code rewritten, using Honda PGM Tester. To perform rewrite procedure requires the vehicle, all master keys, all valet keys and a Honda PGM Tester with an immobilizer program card. Any key not learned during rewrite will not start vehicle. Follow Honda PGM Tester instructions. For more information, see appropriate IMMOBILIZER SYSTEMS article in ACCESSORIES & EQUIPMENT.

HYUNDAI

After disconnecting battery or replacing ECM, drive vehicle to enable ECM to relearn driveability. Inform your customer that they may experience driveability different from what they are accustomed to until ECM completes relearn function.

Key Replacement Or Addition (Customer Supplied 2 Or More Valid Keys)

1. Cut new transponder equipped key(s). Using 1st key, turn ignition to ON position, then to LOCK position 5 times. Turn 1st key to ON position. SECURITY light should illuminate. Turn 1st key to LOCK position. SECURITY light should go out.
2. Using 2nd key, start engine. SECURITY light should illuminate for 1-2 seconds and engine should continue to run. Turn 2nd key to LOCK position and remove key.
3. Repeat step 2 with 1st key. Repeat step 2 with new key. Repeat step 2 with each new or valid key, up to 8 keys total. Wait 30 seconds, program will quit automatically.

Key Replacement Or Addition (Customer Supplied Only One Or No Valid Keys)

1. Cut new transponder equipped key(s). Using new key, turn ignition to ON position, then to LOCK position 5 times. Turn new key to ON position. SECURITY light should be flashing at a 300 millisecond interval. Turn new key to LOCK position and wait about 5 minutes until SECURITY light flashing has decreased to a 1.2 second interval.
2. Input code word. See «INPUTTING CODE WORD»(ref-121714-S40134918242001090400000) . SECURITY light should stop flashing and stay illuminated. Start engine with new key. SECURITY light should illuminate for 1-2 seconds and engine should continue to run. Turn new key to LOCK position and remove key.
3. Using new 2nd key, start engine. SECURITY light should illuminate for 1-2 seconds and engine should continue to run. Turn new 2nd key to LOCK position and remove key.
4. Repeat step 3 with valid key or new 3rd key. Repeat step 3 with each new key, up to 8 keys total. Wait 30 seconds, program will quit automatically.