Secret Code Registration Method: Notes

Required Special Tools: 

• MB991529: Diagnostic trouble code check harness
• MB991958: Scan Tool (MUT-III Sub Assembly)
  • MB991824: Vehicle Communication Interface (V.C.I.)
  • MB991911: MUT-III Main Harness B

Each individual secret code is registered inside the transmitter, and so it is necessary to resister these codes with the EEPROM inside the keyless entry receiver-ECU in the following cases.

• When the transmitter or keyless entry receiver-ECU is replaced.
• If more transmitters are to be used.
• If it appears that a problem is occurring because of faulty registration of a code.

A maximum of two different code can be stored in the memory area of the EEPROM (two different transmitters can be used). When the code for the first transmitter is registered, the previously registered codes for two transmitters are cleared. Therefore, if you are using more than two transmitters or are adding a second transmitter, the codes for all the transmitters must be registered at the same time.