Engine Diesel Engines
NOTE: When re-installing the injectors after a repair, they must be matched to the cylinders
they were removed from. Therefore make a note of the injector correction factors and
the allocated cylinders before removing the injectors. Failure to follow this instruction
may cause irregular idling, increased combustion noise and/or increased black
smoke emissions.
Injection Amount Learning Function
• The injection amount learning function has been modified. As a result, the PCM carries
out the injection amount learning function every 150 km within the first 1,500 km and
after that every 3,000 km, when all of the following conditions are met:
– Engine is idling
– Shift lever is in Neutral position
– Vehicle speed is 0 km/h
– Engine coolant temperature is between 65…95 °C
– A/C is not operating
– Accelerator pedal is not depressed
– DPF regeneration is not performed
• If any of these conditions change while carrying out the injection amount learning
function, the process will be suspended until the conditions are once again met. In
addition, the injection amount learning function has to be carried out at specified service
intervals (refer to the workshop manual).
NOTE: The injection amount learning function is performed several times at a pressure of
35 MPa, 65 MPa, 100 MPa and 140 MPa. As a result, slight changes in engine
sound are normal.
NOTE: The injection amount learning function will be aborted, if the idle fluctuation of the
engine is too high (e.g. due to a faulty injector). In this case the WDS (Worldwide
Diagnostic System) indicates a communication fault, although the communication
between WDS and PCM is okay.
Service Training Mazda6 Facelift 01-49
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