Introduction

Introduction

The variant code is a 4 digit hexadecimal (alpha-numeric) code word. Like the ZCS, the variant code activates the specific market required functions of the control module. The variant code is stored in the control module once it is encoded.
Variant coding through the MoDiC applies to all M1.X DME control modules. M1.x DME control modules are the only DME control modules that are variant encodable.

Using the MoDiC with the latest version of DME Programming software allows the technician to:
- code a new, uncoded control module.
- recode a previously coded control module.

The variant code is entered into the control module either by:
- Adopting the existing code from the defective DME control module (if diagnostic communication is possible).
- Manually entering the variant code with the MoDiC keypad.

The code generates the coding data in the MoDiC and is downloaded to the DME control module. The specific vehicle information relevant to that particular engine group is activated and the control module is ready for use.

NOTE: M1.X DME control modules can be coded up to eight (8) times. The MoDiC displays the remaining number of times the control module can be recoded.

NOTE: If variant encoding of an M1.3 control module for an M20 engine is not possible, Reference SI Bulletin 12 06 89(1878) for more information.

Pin 18 (DME Code Link) of the 20 pin diagnostic connector may be backed out of the connector preventing MoDiC to control module communication.