Mazda 2007 CX-9, Service Highlights

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ON-BOARD DIAGNOSTIC [MZI-3.5]
01-02–13
01-02
Self-test Function
•
The self-test function consists of the KOEO (Key On, Engine Off) self-test, performed when the ignition switch
is turned to the ON position and the engine is stopped, and the KOER (Key On, Engine Running) self-test,
performed when idling.
•
When the self-test is activated, the PCM performs engine control system diagnosis. If any malfunction is
detected as a result of the diagnosis, the applicable DTC is stored. Stored DTCs can be read-out using the
Mazda Modular Diagnostic System (M-MDS).
•
Using the self-test function, the present malfunction or a successful repair is readily confirmed. Refer to the
self-test table for the corresponding DTCs.
KOEO (Key ON, Engine Off) Self-test
•
The KOEO self-test, performed when the ignition switch is turned to the ON position and the engine is stopped,
is designed to diagnose malfunctions related to DTCs applicable to this self-test function. A KOEO self-test
begins when the connected the Mazda Modular Diagnostic System (M-MDS) sends an execute command to
the PCM.
KOER (Key ON, Engine Running) Self-test
•
The KOER, self-test performed when the ignition switch is turned to the ON position, the vehicle is stopped and
the engine is idling, is designed to diagnose malfunctions related to DTCs applicable to this self-test function. A
KOER self-test begins when the connected the Mazda Modular Diagnostic System (M-MDS) an execute
command to the PCM.
End Of Sie
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