Mazda 2006 Mazda5 Technical Information PDF herunterladen (Seite 72)

Fuel System 2.0 MZR-CD Engine

• When the required injection amount is small, the PCM outputs a short drive signal to the

injectors. As a result, the opening time of the injectors is short, resulting in a small

injection amount.

When th

• e required injection amount is large, the PCM outputs a long drive signal to the

injectors. As a result, the opening time of the injectors is long, resulting in a large

injection amount.

Injector Correction Factors

• The manufacturing tolerances of the injectors are taken into account by injector

correction factors. The correction factors are determined during injector production and

are labeled as hexadecimal numbers (seven four-digit blocks and one two-digit block) on

top of the injector connector.

• At the end of the vehicle production line the injector correction factors of the installed

injectors are programmed into the PCM. Hereby the PCM equalizes the injection amount

of the individual injectors in order to improve engine running, combustion noise and

exhaust emissions.

M5_01029

NOTE: After replacing one or more injectors, several steps must be performed to ensure

their proper function (refer to the section “Control System, Maintenance and Repair”).

Injector correction factor 2 View from A

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Mazda 2006 Mazda5 Technical Information Seite 72