Mitsubishi Lancer Evolution X. Manual - part 239

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-21

MODE 6 REFERENCE TABLE

The engine control module (ECM) monitors the condition of emission control system.
By selecting MODE 6 using scan tool, Test Result and Limit Value (minimum) *1 or (maximum) *2 about the
main items of emission control system which ECM monitors can be confirmed. The value at the last monitor-
ing is output by ECM as a test result.

ON-BOARD
DIAGNOSTIC
MONITOR ID

STANDARDIZED /
MANUFACTURER
DEFIND TEST ID

MONITORING ITEM

SIMPLE TECHNICAL DESCRIPTION CONVERSION

COEFFICIENT IN USING
GENERAL SCAN TOOL

Oxygen Sensor Monitor
Bank 1 − Sensor 1

Rich/Lean Switching
frequency

ECM monitors the
deteriorated condition of the
heated oxygen sensor
(front) by checking the
rich/lean switching
frequency of the heated
oxygen sensor (front).

× 1 count

Oxygen Sensor Monitor
Bank 1 − Sensor 2

Maximum Sensor Voltage
for Test Cycle

ECM checks the output
voltage of the heated
oxygen sensor (rear) in
order to monitor whether
the heated oxygen sensor
(rear) outputs the rich
signal.

× 0.122 mV

Oxygen Sensor Monitor
Bank 1 − Sensor 2

Output Voltage change

ECM checks the output
voltage of the heated
oxygen sensor (rear) in
order to monitor whether
the heated oxygen sensor
(rear) output is stuck.

× 0.122 mV

Oxygen Sensor Monitor
Bank 1 − Sensor 2

Rich To Lean Sensor
Switch Time

ECM checks the rich to lean
switching time of the heated
oxygen sensor (rear) in
order to monitor the
response of the heated
oxygen sensor (rear).

× 1 msec

Oxygen Sensor Monitor
Bank 1 − Sensor 2

Output Voltage drop slope

ECM checks the output
voltage drop slope of the
heated oxygen sensor
(rear) in order to monitor
the response of the heated
oxygen sensor (rear).

× 1 msec

Catalyst Monitor Bank 1
Frequency ratio between
Front- and Rear-Oxygen
Sensors

ECM monitors the
deterioration of catalyst by
the output frequency ratio
between heated oxygen
sensor (front) and heated
oxygen sensor (rear).

× 0.0039

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-22

VVT Monitor Bank 1
(L4-IN)
Cam Phase Angle
Deviation (between target
and actual position)

ECM monitors the deviation
between the intake
camshaft target phase
angle and the intake
camshaft actual phase
angle.

× 0.01°

VVT Monitor Bank 2
(L4-EX)
Cam Phase Angle
Deviation (between target
and actual position)

ECM monitors the deviation
between the exhaust
camshaft target phase
angle and the exhaust
camshaft actual phase
angle.

× 0.01°

EVAP Monitor (Cap off)
Pressure drop during
de-pressurizing

ECM monitors the leak of
fuel evaporation gas by
checking whether the
pressure can be reduced
(the amount of pressure
reduction) using the fuel
tank differential pressure
sensor after sealing the fuel
tank and the fuel line.

× 0.0117 kPa

EVAP Monitor (0.040")
Pressure rise during
airtight condition

After ECM vacuumizes the
fuel tank and the fuel line
and then the specified time
is passed, ECM monitors
the leak of fuel evaporation
gas through the fuel tank
differential pressure sensor
to check the reduction of
vacuum in the fuel tank.

× 0.0117 kPa

EVAP Monitor (0.020")
Pressure rise during
airtight condition

× 0.0117 kPa

ON-BOARD
DIAGNOSTIC
MONITOR ID

STANDARDIZED /
MANUFACTURER
DEFIND TEST ID

MONITORING ITEM

SIMPLE TECHNICAL DESCRIPTION CONVERSION

COEFFICIENT IN USING
GENERAL SCAN TOOL

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-23

Mis-Fire Cylinder 1 Data
EWMA Misfire Counts For
Last 10 Driving Cycles

ECM monitors angular
acceleration of crankshaft
and detect misfire. EWMA
(Exponential Weighted
Moving Average) misfire
counts for last 10 driving
cycles.

× 1 count

Mis-Fire Cylinder 1 Data
Misfire Counts For
Last/Current Driving Cycle

ECM monitors angular
acceleration of crankshaft
and detect misfire. Misfire
counts for last/current
driving cycle.

× 1 count

Mis-Fire Cylinder 2 Data
EWMA Misfire Counts For
Last 10 Driving Cycles

ECM monitors angular
acceleration of crankshaft
and detect misfire. EWMA
(Exponential Weighted
Moving Average) misfire
counts for last 10 driving
cycles.

× 1 count

Mis-Fire Cylinder 2 Data
Misfire Counts For
Last/Current Driving Cycle

ECM monitors angular
acceleration of crankshaft
and detect misfire. Misfire
counts for last/current
driving cycle.

× 1 count

Mis-Fire Cylinder 3 Data
EWMA Misfire Counts For
Last 10 Driving Cycles

ECM monitors angular
acceleration of crankshaft
and detect misfire. EWMA
(Exponential Weighted
Moving Average) misfire
counts for last 10 driving
cycles.

× 1 count

Mis-Fire Cylinder 3 Data
Misfire Counts For
Last/Current Driving Cycle

ECM monitors angular
acceleration of crankshaft
and detect misfire. Misfire
counts for last/current
driving cycle.

× 1 count

Mis-Fire Cylinder 4 Data
EWMA Misfire Counts For
Last 10 Driving Cycles

ECM monitors angular
acceleration of crankshaft
and detect misfire. EWMA
(Exponential Weighted
Moving Average) misfire
counts for last 10 driving
cycles.

× 1 count

Mis-Fire Cylinder 4 Data
Misfire Counts For
Last/Current Driving Cycle

ECM monitors angular
acceleration of crankshaft
and detect misfire. Misfire
counts for last/current
driving cycle.

× 1 count

ON-BOARD
DIAGNOSTIC
MONITOR ID

STANDARDIZED /
MANUFACTURER
DEFIND TEST ID

MONITORING ITEM

SIMPLE TECHNICAL DESCRIPTION CONVERSION

COEFFICIENT IN USING
GENERAL SCAN TOOL

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-24

NOTE: *1: Minimum value: The test fails if test value is less than this value.
NOTE: *2: Maximum value: The test fails if test value is greater than this value.
NOTE: When not finishing the monitor of the driving cycle for the request of On-Board Monitoring Test
Request, the ECM outputs the stored latest monitor test result.
NOTE: When the monitored test results are erased by the battery disconnection and so on, the ECM outputs
the values in hexadecimal of "0000" or "FFFF", otherwise it outputs abnormal values and so on. In case of
this, the ECU outputs are handled as invalid-values. When the first monitor (Readiness Status) is completed
after this, the ECM outputs the valid-values.
NOTE: "Test Limit Type & Component ID byte" output from the ECM is given in hexadecimal of "00" or "80".
"00" means the maximum value and "80" means the minimum value.

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 137 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 137 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

Odometer

km or mile

Ignition cycle (Warm
up cycle)

Ignition cycle (Warm up cycle)

−

Accumulated minute

Accumulated minute*

min

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