HOW TO PERFORM CHASSIS NUMBER (CHASSIS NO.) WRITING


Follow the procedure below to register the Chassis No. of the Wireless Control Module (WCM) and the Keyless Operation System (KOS).
Chassis No. is stored in the engine-ECU, WCM, and the KOS-ECU. If the Chassis No. is improperly erased, the engine warning lamp or the keyless operation system warning indicator illuminates, and the diagnosis code is displayed. When the engine-ECU, WCM, and the KOS-ECU are replaced, follow the procedure below to write the Chassis No.


KEY CODE REGISTRATION STEPS FOR THE ENGINE-ECU


caution
  • Check that diagnosis code No.P0603 "EEPROM fail" is not set. When diagnosis code No. P0603 "EEPROM fail" is set, the engine-ECU cannot store the key code even if the key code is registered. If this diagnosis code is set, troubleshoot the engine-ECU and repair, and then register the key code to the engine-ECU.
  • Check that diagnosis code No.P0630 "Chassis No. not programmed" is not set. When diagnosis code No. P0630 Chassis No. not programmed is set, the Chassis No. is not written to the engine-ECU. Replace the engine-ECU with a new one, and carry out the Key Code Registration.


Connect the M.U.T.-III to the 16-pin diagnosis connector as follows.
note For details on how to use the M.U.T.-III, refer to the "M.U.T.-III 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 USB cable (MB991827) to special tool V.C.I. (MB991824) and the personal computer.
4.Connect special tool M.U.T.-III main wiring harness A (MB991910) to the V.C.I.
5.Connect M.U.T.-III main wiring harness A to the diagnosis connector of the vehicle.
6.Turn the V.C.I. power switch to the "ON" position.
note When the V.C.I. is energised, the V.C.I. indicator lamp will be illuminated in a green colour.
7.Start the M.U.T.-III system on the PC and turn the ignition switch to the "ON" position.
8.

Select "IMMOBI/KOS/Keyless" 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 "Key Code Registration" from the "Special Function" screen.
11.

Push the OK button after "Key Code Registration" is displayed.
12.Push the OK button after "Completed." is displayed.
13.Terminate the M.U.T.-III.
14.Turn the ignition switch to the LOCK (OFF) position and then disconnect the M.U.T.-III.

CHASSIS NO. WRITING STEPS FOR WCM AND KOS-ECU


caution Check that diagnosis code No. B2416 "ECU internal error" is not set. When diagnosis code No. B2416 "ECU internal error" is set, the WCM and the KOS-ECU cannot store the Chassis No. even if the Chassis No. is written. If this diagnosis code is set, troubleshoot the WCM or the KOS-ECU and repair, and then write the Chassis No. to the WCM or the KOS-ECU.


Connect the M.U.T.-III to the 16-pin diagnosis connector as follows.
note For details on how to use the M.U.T.-III, refer to the "M.U.T.-III 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 USB cable (MB991827) to special tool V.C.I. (MB991824) and the personal computer.
4.Connect special tool M.U.T.-III main wiring harness A (MB991910) to the V.C.I.
5.Connect M.U.T.-III main wiring harness A to the diagnosis connector of the vehicle.
6.Turn the V.C.I. power switch to the "ON" position.
note When the V.C.I. is energised, the V.C.I. indicator lamp will be illuminated in a green colour.
7.Start the M.U.T.-III system on the PC and turn the ignition switch to the "ON" position.
8.

Select "IMMOBI/KOS/Keyless" 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 "Chassis No. Writing" on "Coding" screen.
11.

Push the OK button after the Chassis No. written in the engine-ECU is displayed.
12.Push the OK button after "Chassis No. Writing will start. Are you sure?" is displayed.
13.Push the OK button after "Completed." is displayed.
14.

Result of Chassis No. 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>.)