What is the Difference Between Coding and Programming: Coding
Coding selects a set of instructions that are already present in a control module. When a codable module is ordered from the parts department it contains all of the programs necessary for any applicable vehicle version.
The programs are stored in an EPROM as "Resident Data". During the coding process one set of instructions (e.g. USA version, equipped with board monitor, high cluster, etc.) is activated in the control module. Coding is used for most control modules in the vehicle except for powertrain control modules.
The various types of coding methods are:
- ZCS Coding.
- Coding Code (no longer supported).
- Variant Coding (DME).
- Vehicle and Key Memory Coding.