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HOW TO PERFORM VEHICLE IDENTIFICATION NUMBER (VIN) WRITING


caution The F.A.S.T-Key (Free-hand Advanced Security Transmitter) is described as the Keyless Operation System (KOS) in this manual. (KOS is indicated as F.A.S.T. in the scan tool display.)
Follow the procedure below to register the VIN of the Wireless Control Module (WCM) and the Keyless Operation System (KOS).
The VIN is stored in the engine control module (ECM), WCM, and the KOS-ECU. If the VIN is improperly erased, the engine warning light or the keyless operation system warning indicator illuminate, and the diagnostic trouble code is displayed. When the ECM, WCM, and the KOS-ECU are replaced, follow the procedure below to write the VIN.


WRITING PROCEDURE
Required Special Tools:
  • MB991958: Scan Tool (M.U.T.-III Sub Assembly)

    • MB991824: V.C.I.
    • MB991827: M.U.T.-III USB Cable
    • MB991910: M.U.T.-III Main Harness A
caution Check that diagnostic trouble code P0603 "EEPROM fail" is not set. When diagnostic trouble code P0603 "EEPROM fail" is set, the ECM cannot store the key code even if the key code is registered. If this diagnostic trouble code is set, troubleshoot the ECM and repair. Then register the key code to the ECM.
caution Before connecting or disconnecting the MB991958: Scan Tool, turn the ignition switch to the "LOCK" (OFF) position.

Connect scan tool MB991958 to the 16-pin data link connector as follows.
note For details on how to use scan tool MB991958, refer to the "M.U.T.-III Owner’s Manual."
1.Ensure that the ignition switch is at the "LOCK" (OFF) position.
2.Start up the personal computer.
3.Connect special tool MB991827 to special tool MB991824 and the personal computer.
4.Connect special tool MB991910 to the special tool MB991824.
5.Connect special tool MB991910 to the data link connector of the vehicle.
6.Turn the special tool MB991824 power switch to the "ON" position.
note When the special tool MB991824 is energized, the special tool MB991824 indicator light will be illuminated in a green color.
7.Start the "M.U.T.-III system" on the personal computer and turn the ignition switch to the "ON" position.

8.Select "F.A.S.T./IMMO/Keyless/TPMS" button from the "System Select" screen. Then, select the applicable option code item and push the OK button.
9.Select "Special Function" on the next screen.


10.Select "ENG key code & VIN Reg." from the "Special Function" screen.

11.Push the OK button after "ENG key code & VIN Reg." is displayed.
12.Push the OK button after "Completed. Press the OK button and move to VIN writing function." is displayed.

13.Enter the VIN of registering vehicle and push the OK button.
14.Push the OK button after "VIN Writing will start. Are you sure?" is displayed.
15.Return to the previous screen and "In Progress" is displayed at the lower-left corner on the screen.
16.Push the OK button after "Completed." is displayed.

17.VIN writing result is displayed.
18.Complete the scan tool MB991958.
19.Disconnecting the scan tool MB991958 is the reverse of the connecting sequence, making sure that the ignition switch is at the "LOCK" (OFF).
20.Push the OK button after "Completed." is displayed.
21.Terminate the scan tool MB991958.
22.Turn the ignition switch to the "LOCK" (OFF) position and then disconnect scan tool MB991958.

VIN WRITING STEPS FOR WCM AND KOS-ECU
caution Before the VIN registration to WCM and KOS-ECU, check that the VIN of ECM and vehicle are matched.
caution Check that diagnostic trouble code B2416 "ECU internal error" is not set. When diagnostic trouble code B2416 "ECU internal error" is set, the WCM and the KOS-ECU cannot store the VIN even if the VIN is written. If this diagnostic trouble code is set, troubleshoot the WCM or the KOS-ECU and repair. Then write the VIN to the WCM or the KOS-ECU.
caution Before connecting or disconnecting the MB991958: Scan Tool, turn the ignition switch to the "LOCK" (OFF) position.

Connect scan tool MB991958 to the 16-pin data link connector as follows.
note For details on how to use scan tool MB991958, refer to the "M.U.T.-III Owner’s Manual."
1.Ensure that the ignition switch is at the "LOCK" (OFF) position.
2.Start up the personal computer.
3.Connect special tool MB991827 to special tool MB991824 and the personal computer.
4.Connect special tool MB991910 to the special tool MB991824.
5.Connect special tool MB991910 to the data link connector of the vehicle.
6.Turn the special tool MB991824 power switch to the "ON" position.
note When the special tool MB991824 is energized, the special tool MB991824 indicator light will be illuminated in a green color.
7.Start the "M.U.T.-III system" on the personal computer and turn the ignition switch to the "ON" position.

8.Select "F.A.S.T./IMMO/Keyless/TPMS" button from the "System Select" screen. Then, select the applicable option code item and push the OK button.
9.Select "Coding" on the next screen.

10.Select "VIN Writing" on "Coding" screen.

11.Push the OK button after the VIN written in the engine control module is displayed.
12.Push the OK button after "VIN Writing will start. Are you sure?" is displayed.
13.Push the OK button after "Completed." is displayed.

14.Result of VIN writing is displayed.
15.Resister the other ID code. (Refer to GROUP 42B, Troubleshooting - ID Code Registration Judgment Table <Vehicles with KOS> or GROUP 42C, Troubleshooting - ID Code Registration Judgment Table <Vehicles with WCM>.)