Mitsubishi Outlander GS45X. Manual - part 551
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-27
ON-BOARD DIAGNOSTICS
The engine control module (ECM) monitors the
input/output signals (some signals all the time and
others under specified conditions) of the ECM. When
a malfunction continues for a specified time or longer
after the irregular signal is initially monitored, the
ECM judges that a malfunction has occurred. After
the ECM first detects a malfunction, a diagnostic
trouble code is recorded when the engine is restarted
and the same malfunction is re-detected. However,
for items marked with a "*1", a diagnostic trouble
code is recorded on the first detection of the malfunc-
tion. There are 138 diagnostic items. The diagnostic
results can be read out with a scan tool. Since mem-
orization of the diagnostic trouble codes is backed up
directly by the battery, the diagnostic results are
memorized even if the ignition key is turned off. The
diagnostic trouble codes will, however, be erased
when the battery terminal or the ECM connector is
disconnected. In addition, the diagnostic trouble
code can also be erased by turning the ignition
switch to ON and sending the diagnostic trouble
code erase signal from scan tool MB991958 to the
ECM.
NOTE: If the sensor connector is disconnected with
the ignition switch turned on, the diagnostic trouble
code is memorized. In this case, send the diagnostic
trouble code erase signal to the ECM in order to
erase the diagnostic memory. The 138 diagnostic
items are all indicated sequentially from the smallest
code number. The ECM records the engine operat-
ing condition when the diagnostic trouble code is set.
This data is called "Freeze-frame" data. This data
can be read by using the scan tool, and can then be
used in simulation tests for troubleshooting. Data
items are as follows:
NOTE: If the ECM detects multiple malfunctions, the
ECM stores the "Freeze-frame" data for only the first
item that was detected. However, if the ECM detects
a misfire or a fuel system malfunction, the ECM
stores the data by giving priority to the misfire or fuel
system malfunction, regardless of the order in which
the malfunction was detected.
NOTE: As for Diagnostic trouble code P1603,
"Freeze-frame" data is not memorized.
Freeze Frame Data for M.U.T.-III
NOTE: *: Accumulated time of current malfunction from time point when malfunction is detected.
ITEM NO. M.U.T.-III SCAN TOOL
DISPLAY
DATA ITEM
UNIT or STATE
1
Odometer
Odometer
km or mile
2
Ignition cycle (Warm
up cycle)
Ignition cycle (Warm up cycle)
−
4
Accumulated minute
Accumulated minute*
min