The Peugeot 308 HDI is equipped with a sophisticated Injection System. To maintain the high accuracy of this Injection System throughout the Vehicle’s life, it utilises a system to compensate for variations in Injector fuel flows, called “IMA”.
DESCRIPTION AND OPERATING IMA
IMA coding increases the injector’s accuracy in delivering fuel for both input and out flows. This software enables each injector to be individually programmed according to the manufacturers guidelines. Each injector can then operate within tolerances as specified.
During the production of these injectors values are measured showing the performance of each injector. These are the difference between the production and the theoretical values which are printed on every injector.
Additionally, these values are also printed as a matrix code on each injector.
When some injectors with IMA code are fitted, the code has to be input in the ECU (Electronic Control Unit) to assure the proper working of the vehicle. The values which have been inputted, are used to compensate for differences in the performance of fuel flows in the injector CR.