Computer Relearn Procedures - Import: Diagnosis Lexus ES XV30

POWERTRAIN CONTROL MODULE RESET PROCEDURE/CLEARING DIAGNOSTIC TROUBLE CODES (ALL MODELS)

Note. Some models have an anti-theft code built into radio circuit. Clearing codes cancels clock and radio settings; make note of anti-theft code and station presets before beginning reset procedure. After PCM reset, radio will not operate until anti-theft code is entered.

Note. If service check connector is connected and no DTC is stored in PCM, MIL will remain on when the ignition is turned on.

To reset Powertrain Control Module (PCM) (clear DTCs), use Honda PGM tester or OBD-II scan tool following manufacturer's instructions. After DTCs are cleared and PCM is reset, remove SCS service connector, if connected. Disconnect Honda PGM Tester or scan tool from DLC. DTCs can also be cleared by turning ignition off and removing BACK UP (RADIO) fuse (7.5-amp) from underhood fuse/relay block (located next to battery). On all models, leave fuse out for at least 10 seconds to reset PCM.

SYSTEM READINESS TEST CODES

If battery has been disconnected, DTCs have been cleared or PCM has been reset, readiness codes will reset. In some states part of emission testing is to ensure readiness codes are complete. If readiness codes are not complete, emission test cannot be finished.

To check if readiness codes are complete, turn ignition switch on, engine off. MIL will illuminate for 15-20 seconds. If MIL goes off, readiness codes are complete. If MIL blinks several times, one or more readiness codes are not complete.

To set each code, drive vehicle or run engine as described in following procedures.

All Honda engines have specific system readiness codes that are part of the on-board diagnostics for the emissions systems. If the vehicle battery has been disconnected or discharged, these codes are erased. In some states where Inspection/Maintenance (I/M) testing of vehicle emissions is performed, these codes must be set. If all the codes are not set, the I/M test cannot be completed.

The Malfunction Indicator Light (MIL) is used to display state of system readiness. To determine if readiness codes are set, turn ignition on, but do not start engine. MIL should come on for 15-20 seconds. If MIL then goes off, readiness test codes are set. If MIL blinks several times, readiness test codes are not set completely. To reset each code, drive vehicle or run engine as described in following procedures.

Using LEXUS Scan Tool

1. Insert registered master key in ignition. Turn ignition on.
2. Perform this step within 2 minutes. Select LS430, IMMOBILIZER, KEY CODE UTILITY and TRANSPONDER CODE REGISTRATION from LEXUS scan tool.
3. Perform this step within 20 seconds. Remove master key.
4. Perform this step within 10 seconds. Insert master key to be registered in ignition. Security indicator should flash. After one minute, additional master key is registered. Security indicator should turn off.

Registration Of Key Number (Using LEXUS Scan Tool)

1. Insert registered master key in ignition. Turn ignition on.
2. Select LS430, IMMOBILIZER, KEY CODE UTILITY and KEY NO. REGISTRATION.
3. Insert key number of key number plate according to Lexus scan tool screen. Observe scan tool and ensure key number is registered to transponder key ECU.

Change Of Key Number (Using LEXUS Scan Tool)

1. Insert registered master key in ignition. Turn ignition on.
2. Select LS430, IMMOBILIZER, KEY CODE UTILITY and KEY NO. CHANGE.
3. Insert key number of key number plate according to Lexus scan tool screen. Observe scan tool and ensure key number is changed. Remove master key.

1. Insert master key in ignition. Turn ignition on.
2. Perform this step within 2 minutes. Select LS430 from menu. Select IMMOBILIZER, KEY CODE UTILITY and TRANSPONDER CODE REGISTRATION. After these operations, proceed to additional operations following prompts on tester screen.
3. Perform this step within 10 seconds. Remove master key.
4. Procedure is now completed. Key code should now be erased. If key cannot be removed from ignition, key code deletion is canceled. Security indicator will turn off. Repeat procedure from step 1 .

Diagnostic Aids

If none of the functions can be used, use scan tool to check for any stored DTCs. If any DTCs are stored, perform appropriate test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS in appropriate SELF-DIAGNOSTICS article. Then repeat operation. If an incorrect password is input five times in a row, immobilizer-ECU judges that an unauthorized operation is being attempted. Start-prevention mode will be set, and engine operation will stop and all special functions will be disabled. If ignition switch is turned on, and left in that position for approximately 20 minutes, "Unauthorized operation, start- prevention mode" will be cancelled.

Registration Of Additional Keys (With Scan Tool)

An additional key is registered with MUT-II scan tool while keeping all existing registered key data. To register additional keys with scan tool, no registered keys must be lost. To register an additional key using scan too1 to perform following

1. Connect MUT-II or equivalent scan tool to Data Link Connector (DLC). Turn ignition switch to ON position.
2. On scan tool at SYSTEM SELECT, press YES. Select IMMOBILIZER, press YES. Select SPECIAL FUNC, press YES. Select KEY ID REGISTER, press YES. If DTC 11 is stored, CAN'T EXECUTE will be displayed. Perform appropriate test procedure, see appropriate IMMOBILIZER SYSTEMS article in ACCESSORIES & EQUIPMENT.
3. Follow scan tool instructions to add an additional key. If an error occurs during key ID registration, scan tool will display CAN'T EXECUTE. If key has already been registered, KEY ID HAS BEEN REGISTERED will be displayed.
4. The number of keys currently registered will be displayed. To register an additional key, replace ignition key with next key to be registered within 5 seconds and then press YES key. Key ID registration screen will be displayed, then register another key. A maximum of eight different keys can be registered. If key ID registration is complete, press the NO key.
5. This completes the registration operation. Turn ignition switch to LOCK position and leave it off for approximately ten seconds.
6. Check that engine can be started with each registered ignition key.
7. Using scan tool, check that immobilizer system and/or MFI system DTCs did not set. Turn ignition switch to LOCK position. Disconnect scan tool.

Registration Of Additional Keys (Without Using Scan Tool)

Additional ignition keys can be registered without using the scan tool by operating two ignition keys that already have been registered to the vehicle and operating an additional key to be registered. A maximum of 8 ignition keys can be registered. To register additional keys without using scan tool

1. Using a key (Key A) which has already been registered to the vehicle, turn ignition switch to ON position. Leave Key A in ON position for about 5 seconds. Turn ignition off, and remove Key A.
2. Using a second key (Key B) which has already been registered to the vehicle, turn ignition switch to ON position. Leave Key B in ON position for about 5 seconds. Turn ignition off, and remove Key B. Key B must be turned on within 7 seconds of removing first key.
3. If Key B is correct, immobilizer-ECU enters additional key entry mode. Theft-alarm indicator light in instrument cluster blinks about twice a second. After theft-alarm indicator light begins to blink, turn ignition switch to OFF and ON positions using new transponder key. Time during which new key can be registered is limited to less than 30 seconds after theft-alarm indicator blinks.
4. To register another key, turn ignition to OFF position. Place ignition key to be registered in ignition switch, and turn key to ON position within seven seconds. To add additional keys, repeat procedure. A maximum of 8 ignition keys can be registered. Additional key registration mode is terminated when any following condition is met: Ignition key is in ON position more than 30 seconds (time-out of addition entry mode). Engine control relay is off after key is turned to OFF position. Start communication with scan tool.
5. Ensure additional registered keys can start engine, after ignition is turned off and engine control relay is turned off.