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HOW TO PERFORM VIN WRITING
 
 
The VIN is described on the engine control module (ECM), the ETACS-ECU, the EPS-ECU, the SRS-ECU and the KOS&OSS-ECU <Vehicles with Keyless Operation System (KOS). If the VIN is improperly erased, the engine warning light, the EPS warning light, the SRS warning light, the keyless operation system warning display or the immobilizer warning light is illuminated, and the DTC is displayed. When any of these ECUs is replaced, register the VIN according to the following procedures.

notePerform the variant coding of the ECM when the VIN or the vehicle identification number is registered to the ECM.
 
 
ENGINE KEY CODE AND VIN REGISTRATION STEPS FOR THE ECM <VEHICLES WITHOUT KOS>
Required Special Tools:
  • MB992744: Vehicle communication interface-Lite (V.C.I.-Lite)
  • MB992745: V.C.I.-Lite main harness A
  • MB992747: V.C.I.-Lite USB cable short
  • MB992748: V.C.I.-Lite USB cable long
caution
  • Check that DTC P062F "EEPROM malfunction" is not set. When DTC P062F "EEPROM malfunction" is set, the ECM cannot store engine key code and VIN even if the engine key code and VIN are registered. If this DTC is set, troubleshoot the ECM and repair, and then register the engine key code and VIN to the ECM.
  • Before connecting or disconnecting the scan tool (M.U.T.-IIISE), turn the ignition switch to the "LOCK" (OFF) position.
Connect the scan tool (M.U.T.-IIISE) to the 16-pin data link connector as follows.
noteFor details on how to use the scan tool (M.U.T.-IIISE), refer to the "M.U.T.-IIISE User's Manual."
1. Ensure that the ignition switch is at the "LOCK" (OFF) position.
2. Start up the personal computer.
3. Connect special tool V.C.I.-Lite USB cable (MB992747/MB992748) to V.C.I.-Lite (MB992744) and the personal computer.
4. Connect V.C.I.-Lite main harness A (MB992745) to the V.C.I.-Lite.
5. Connect the V.C.I.-Lite main harness A to the data link connector of the vehicle.
noteWhen the V.C.I.-Lite is connected to the data link connector, the V.C.I.-Lite indicator light will be illuminated in a green color.
6. Start the M.U.T.-IIISE system on the personal computer and turn the ignition switch to the "ON" position.
7. Select "F.A.S.T./OSS/IMMO/Keyless" button from the "System Select" screen. Then, select the applicable option code item and push the OK button.
  • The display of "Special Function" screen changes, depending on the contents of the option. For vehicles with KOS, select "with F.A.S.T." For vehicles without KOS, select "without F.A.S.T."
8. Select "Special Function" on the next screen.
9.
Select "ENG Key Code&Chassis No./VIN Reg." from the "Special Function" screen.
10.
Push the OK button after "Key Code Registration to ECM" is displayed.
11. Push the OK button after "Completed. Press the OK button and move to Chassis No./VIN writing function." is displayed.
12. Enter the Chassis No./VIN of registering vehicle and push the OK button.
13. Push the OK button after "Chassis No./VIN Writing will start. Are you sure?" is displayed.
14. Return to the previous screen and "In Progress" is displayed at the lower-left corner on the screen.
15. Push the OK button after "Completed." is displayed.
16.
Chassis No./VIN writing result is displayed.
17. Complete the scan tool (M.U.T.-IIISE).
18. Push the OK button after "Completed." is displayed.
19. Terminate the scan tool (M.U.T.-IIISE).
20. Turn the ignition switch to the "LOCK" (OFF) position and then disconnect the scan tool (M.U.T.-IIISE).

 
 
VIN REGISTRATION STEPS FOR THE ECM <VEHICLES WITH KOS>
caution
  • Check that DTC P062F "EEPROM malfunction" is not set. When DTC P062F "EEPROM malfunction" is set, the ECM cannot store engine key code and VIN even if the engine key code and VIN are registered. If this DTC is set, troubleshoot the ECM and repair, and then register the engine key code and VIN to the ECM.
  • Before connecting or disconnecting the scan tool (M.U.T.-IIISE), put the power supply mode is OFF.
Connect the scan tool (M.U.T.-IIISE) to the 16-pin data link connector as follows.
noteFor details on how to use the scan tool (M.U.T.-IIISE), refer to the "M.U.T.-IIISE User's Manual."
1. Start up the personal computer.
2. Connect special tool V.C.I.-Lite USB cable (MB992747/MB992748) to V.C.I.-Lite (MB992744) and the personal computer.
3. Connect V.C.I.-Lite main harness A (MB992745) to the V.C.I.-Lite.
4. Connect the V.C.I.-Lite main harness A to the data link connector of the vehicle.
noteWhen the V.C.I.-Lite is connected to the data link connector, the V.C.I.-Lite indicator light will be illuminated in a green color.
5. Start the M.U.T.-IIISE system on the personal computer and put the power supply mode is ON.
6. Select "F.A.S.T./OSS/IMMO/Keyless" in the "System Select" screen. Then, select the applicable option code item and push the OK button. Select "Special Function" on the next screen, and select "ENG Key Code & Chassis No/VIN Reg" on the further screen.
7.
Push the OK button after "Key Code Registration" is displayed.
8. Push the OK button after "Completed. Press OK button and move to Chassis No./VIN writing function." is displayed.
9. Enter the VIN of registering vehicle and push the OK button.
10. Push the OK button after "Chassis No./VIN Writing will start. Are you sure?" is displayed.
11. Return to the previous screen and "In Progress" is displayed at the lower-left corner on the screen.
12. Push the OK button after "Completed." is displayed.
13.
VIN writing result is displayed.

 
 
VIN WRITING STEPS FOR ETACS-ECU (IMMOBILIZER)
caution
  • Before the VIN registration to ETACS-ECU, check that the chassis Nos. of ECM and vehicle are matched.
  • Check that DTC B1709 "ETACS ECU (EEPROM)" is not set. When DTC B1709 "ETACS ECU (EEPROM)" is set, the ETACS-ECU cannot store the VIN even if the VIN is written. If this DTC is set, troubleshoot the immobilizer system and repair, and then write the VIN to the ETACS-ECU.
  • Before connecting or disconnecting the scan tool (M.U.T.-IIISE), turn the ignition switch to the "LOCK" (OFF) position.
Connect the scan tool (M.U.T.-IIISE) to the 16-pin data link connector as follows.
noteFor details on how to use the scan tool (M.U.T.-IIISE), refer to the "M.U.T.-IIISE User's Manual."
1. Start up the personal computer.
2. Connect special tool V.C.I.-Lite USB cable (MB992747/MB992748) to V.C.I.-Lite (MB992744) and the personal computer.
3. Connect V.C.I.-Lite main harness A (MB992745) to the V.C.I.-Lite.
4. Connect the V.C.I.-Lite main harness A to the data link connector of the vehicle.
noteWhen the V.C.I.-Lite is connected to the data link connector, the V.C.I.-Lite indicator light will be illuminated in a green color.
5. Start the M.U.T.-IIISE system on the personal computer.
6. Select "F.A.S.T./OSS/IMMO/Keyless" button from the "System Select" screen. Then, select the applicable option code item and push the OK button.
  • For vehicles with KOS, select "with F.A.S.T." For vehicles without KOS, select "without F.A.S.T."
7. Select "Coding" on the next screen.
8.
Select "Chassis No. /VIN Writing" on "Coding" screen.
9.
Push the OK button after the VIN written in the ECM is displayed.
10. Push the OK button after "Chassis No./VIN Writing will start. Are you sure?" is displayed.
11. Push the OK button after "Completed." is displayed.
12.
Result of VIN writing is displayed.
13. Register the other ID code (Refer to the separate manual "How to register an ID").
 
 
VIN WRITING STEPS FOR KOS&OSS-ECU
caution
  • When KOS&OSS-ECU is replaced, all the registrations that need to be performed at KOS&OSS-ECU replacement must be completed before the registration of KOS&OSS-ECU.
  • Be sure to check that DTC B1157 "EEPROM fail" is not set. If DTC B1157 "EEPROM fail" is set, the VIN cannot be set in memory even when it is written. Therefore, when the DTC is set, be sure to carry out the troubleshooting first to repair the trouble, and then write the VIN to KOS&OSS-ECU.
Connect the scan tool (M.U.T.-IIISE) to the 16-pin data link connector as follows.
noteFor details on how to use the scan tool (M.U.T.-IIISE), refer to the "M.U.T.-IIISE User's Manual."
1. Start up the personal computer.
2. Connect special tool V.C.I.-Lite USB cable (MB992747/MB992748) to V.C.I.-Lite (MB992744) and the personal computer.
3. Connect V.C.I.-Lite main harness A (MB992745) to the V.C.I.-Lite.
4. Connect the V.C.I.-Lite main harness A to the data link connector of the vehicle.
noteWhen the V.C.I.-Lite is connected to the data link connector, the V.C.I.-Lite indicator light will be illuminated in a green color.
5. Start the M.U.T.-IIISE system on the personal computer.
6. Select "F.A.S.T./OSS/IMMO/Keyless" button from the "System Select" screen. Then, select the applicable option code item and push the OK button.
  • For vehicles with KOS, select "with F.A.S.T." For vehicles without KOS, select "without F.A.S.T."
7. Select "Coding" on the next screen.
8.
From the coding menu screen, select "Chassis No./VIN Writing."
9.
Following the instruction on the screen, press the "OK" button to execute the VIN writing.
10.
On the writing result confirmation screen, check that the VIN is written, and finish the registration.
11. Operate the engine switch to turn OFF the power supply.
noteAfter the scan tool (M.U.T.-IIISE) has executed the VIN writing, it will turn the engine switch on forcibly. Therefore, after completion, turn the engine switch off.
12. Set the driver's door from open to close or from close to open.
13. Carrying the keyless operation key, perform the engine switch operation to turn the power from OFF to ON twice.
14. Check that the KOS&OSS-ECU DTC (B1160 or B1166) is not set, and finish the registration.

 
 
VIN REGISTRATION STEPS FOR THE ETACS-ECU (ETACS)
caution
  • Check that DTC B1761 "Chassis No. not programmed" or B1760 "Coding not completed" is not set. When DTC B1761 "VIN not programmed" or B1760 "Coding not completed" is set, the ETACS-ECU cannot store VIN even if the VIN is registered. If this DTC is set, troubleshoot the ETACS-ECU and repair, and then register the VIN to the ETACS-ECU.
  • Before connecting or disconnecting the scan tool (M.U.T.-IIISE), turn the ignition switch to the "LOCK" (OFF) position.
Connect the scan tool (M.U.T.-IIISE) to the 16-pin data link connector as follows.
noteFor details on how to use the scan tool (M.U.T.-IIISE), refer to the "M.U.T.-IIISE User's Manual."
1. Start up the personal computer.
2. Connect special tool V.C.I.-Lite USB cable (MB992747/MB992748) to V.C.I.-Lite (MB992744) and the personal computer.
3. Connect V.C.I.-Lite main harness A (MB992745) to the V.C.I.-Lite.
4. Connect the V.C.I.-Lite main harness A to the data link connector of the vehicle.
noteWhen the V.C.I.-Lite is connected to the data link connector, the V.C.I.-Lite indicator light will be illuminated in a green color.
5. Start the M.U.T.-IIISE system on the personal computer and turn the ignition switch to the "ON" position.
6. Select "ETACS" button from the "System Select" screen.
7.
Select "Coding" on the next screen.
8. Select "Chassis No./VIN Writing" screen.
9. Enter the VIN in the New VIN frame. Confirm the number and press the OK button.
10.
Following the instruction on the screen, press the OK button to execute the VIN writing.
11.
Push the OK button after "Completed." is displayed.
12.
On the writing result confirmation screen, check that the VIN is written, and finish the registration.

 
 
VIN REGISTRATION STEPS FOR THE EPS-ECU
caution
  • Check that DTC U1199 "VIN not programmed" or U1195 "Coding not completed" is not set. When DTC U1199 "VIN not programmed" or U1195 "Coding not completed" is set, the EPS-ECU cannot store chassis No. even if the VIN is registered. If this DTC is set, troubleshoot the EPS-ECU and repair, and then register the VIN to the EPS-ECU.
  • Before connecting or disconnecting the scan tool (M.U.T.-IIISE), turn the ignition switch to the "LOCK" (OFF) position.
Connect the scan tool (M.U.T.-IIISE) to the 16-pin data link connector as follows.
noteFor details on how to use the scan tool (M.U.T.-IIISE), refer to the "M.U.T.-IIISE User's Manual."
1. Start up the personal computer.
2. Connect special tool V.C.I.-Lite USB cable (MB992747/MB992748) to V.C.I.-Lite (MB992744) and the personal computer.
3. Connect V.C.I.-Lite main harness A (MB992745) to the V.C.I.-Lite.
4. Connect the V.C.I.-Lite main harness A to the data link connector of the vehicle.
noteWhen the V.C.I.-Lite is connected to the data link connector, the V.C.I.-Lite indicator light will be illuminated in a green color.
5. Start the M.U.T.-IIISE system on the personal computer and turn the ignition switch to the "ON" position.
6. Select "ECPS/4WS" button from the "System Select" screen.
7.
Select "Coding" on the next screen.
8. Select "Chassis No./VIN Writing" screen.
9. Enter the VIN in the New VIN frame. Confirm the number and press the OK button.
10.
Following the instruction on the screen, press the OK button to execute the VIN writing.
11.
Push the OK button after "Completed." is displayed.
12.
On the writing result confirmation screen, check that the VIN is written, and finish the registration.

 
 
VIN REGISTRATION STEPS FOR THE SRS-ECU
caution
  • Check that DTC B1496 "SRS-ECU non-volatile memory (EEPROM)", U1199 "VIN not programmed" or U1195 "Coding not completed" is not set. When DTC B1496 "SRS-ECU non-volatile memory (EEPROM)", No.U1199 "VIN not programmed" or No.U1195 "Coding not completed" is set, the SRS-ECU cannot store VIN even if the VIN is registered. If this DTC is set, troubleshoot the SRS-ECU and repair, and then register the VIN to the SRS-ECU.
  • Before connecting or disconnecting the scan tool (M.U.T.-IIISE), turn the ignition switch to the "LOCK" (OFF) position.
Connect the scan tool (M.U.T.-IIISE) to the 16-pin data link connector as follows.
noteFor details on how to use the scan tool (M.U.T.-IIISE), refer to the "M.U.T.-IIISE User's Manual."
1. Start up the personal computer.
2. Connect special tool V.C.I.-Lite USB cable (MB992747/MB992748) to V.C.I.-Lite (MB992744) and the personal computer.
3. Connect V.C.I.-Lite main harness A (MB992745) to the V.C.I.-Lite.
4. Connect the V.C.I.-Lite main harness A to the data link connector of the vehicle.
noteWhen the V.C.I.-Lite is connected to the data link connector, the V.C.I.-Lite indicator light will be illuminated in a green color.
5. Start the M.U.T.-IIISE system on the personal computer and turn the ignition switch to the "ON" position.
6. Select "SRS-AIR BAG" button from the "System Select" screen.
7.
Select "Coding" on the next screen.
8. Select "Chassis No./VIN Writing" screen.
9. Enter the VIN in the New VIN frame. Confirm the number and press the OK button.
10.
Following the instruction on the screen, press the OK button to execute the VIN writing.
11.
Push the OK button after "Completed." is displayed.
12.
On the writing result confirmation screen, check that the VIN is written, and finish the registration.