Mitsubishi Montero Sport (2004+). Manual — part 150
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-13
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. Select "Interactive Diagnosis" from the start-up screen.
4. Select "System select."
5. Choose "MFI" from the "POWER TRAIN" tab.
6. Select "MITSUBISHI."
7. Select "Data List" or "Actuator Test."
8. Choose an appropriate item and select the "OK" button.
ON-BOARD DIAGNOSTICS
The powertrain control module (PCM) monitors the input/output signals (some signals all the time and others
under specified conditions) of the PCM. When a malfunction continues for a specified time or longer after the
irregular signal is initially monitored, the PCM judges that a malfunction has occurred. After the PCM first
detects a malfunction, a diagnostic trouble code is recorded when the engine is restarted and the same mal-
function is re-detected. However, for items marked with a "*", a diagnostic trouble code is recorded on the first
detection of the malfunction. There are 101 diagnostic items. The diagnostic results can be read out with a
scan tool. Since memorization of the diagnostic trouble codes is backed up directly by the battery, the diag-
nostic 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 PCM connector is disconnected. In addition, the diagnostic trouble
code can also be erased by turning the ignition switch to "ON" position and sending the diagnostic trouble
code erase signal from scan tool to the PCM.
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 PCM in order to erase the
diagnostic memory. The 101 diagnostic items are all indicated sequentially from the smallest code number.
The PCM records the engine operating condition when the diagnostic trouble code is set. This data is called
"Freeze-frame" date. 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 PCM detects multiple malfunctions, the PCM stores the data for only the first item that was
detected.
However, if the PCM detects a misfire or a fuel system malfunction, PCM tores 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.
AK303629AB
MB991911
MB991827
MB991824
16-PIN
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-14
OBD- II DRIVE CYCLE
All kinds of diagnostic trouble codes (DTCs) can be monitored by carrying out a short drive according to the
following six drive cycle pattern. In other words, doing such a drive regenerates any kind of trouble which
involves illuminating the Malfunction Indicator Lamp (SERVICE ENGINE SOON or Check Engine Lamp) and
verifies the repair procedure has eliminated the trouble (the Malfunction Indicator Lamp (SERVICE ENGINE
SOON or Check Engine Lamp) is no longer illuminated).
CAUTION
Two technicians should always be in the vehicle when carrying out a test.
NOTE: Check that the diagnosis trouble code (DTC) is not output before traveling in the drive cycle pattern.
Erase the DTC if it has been output.
SCAN TOOL DISPLAY
ITEM
NO.
DATA ITEM
UNIT or STATE
ECT SENSOR
21
Engine coolant temperature sensor
°C or °F
ENGINE LOAD
87
Calculated load value
%
ENGINE SPEED
22
Crankshaft position sensor
r/min
IAT SENSOR
13
Intake air temperature sensor
°C or °F
IG. TIMING ADV
44
Ignition coils and ignition power
transistor
deg
LONG TRIM B1
81
Long-term fuel compensation
%
LONG TRIM B2
83
Long-term fuel compensation
%
MAP/MDP SNSR.
32
Manifold absolute pressure sensor
kPa
SHORT TRIM B1
82
Short-term fuel compensation
%
SHORT TRIM B2
84
Short-term fuel compensation
%
SYS. STATUS B1
88
Fuel system status (right bank)
• Open loop
• Closed loop
• Open loop-drive
condition
• Open loop-DTC set
• Closed loop-O
2
(rear)
failed
SYS. STATUS B2
89
Fuel system status (left bank)
• Open loop
• Closed loop
• Open loop-drive
condition
• Open loop-DTC set
• Closed loop-O
2
(rear)
failed
TP SENSOR
8A
Throttle position sensor
%
VAF/MAF SNSR.
12
Volume airflow sensor (mass airflow
rate)
gm/s
VSS
24
Vehicle speed sensor
km/h or mph
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-15
DRIVE CYCLE PATTERN LIST
.
PROCEDUR
E
MONITOR ITEM
DIAGNOSTIC TROUBLE
CODE (DTC)
1
Evaporative emission system leak monitor
P0441, P0442, P0451,
P0452, P0453, P0455,
P0456
2
Fuel trim monitor
P0171, P0172, P0174,
P0175
3
Catalytic converter monitor
P0421, P0431
4
Heated oxygen sensor monitor
P0133, P0139, P0153,
P0159
5
Exhaust gas recirculation (EGR) system monitor
P0401
6
Other monitor
Main components
P0106, P0107, P0108,
P0134, P0154, P0300,
P0301, P0302, P0303,
P0304, P0305, P0306,
P0506, P0507
Sensors and switches
P0101, P0102, P0111,
P0112, P0113, P0116,
P0117, P0118, P0121,
P0122, P0123, P0125,
P0181, P0182, P0183,
P0325, P0335, P0340,
P0461, P2227, P2228,
P2229
Wire breakage and short
circuit
P0130, P0131, P0132,
P0135, P0136, P0137,
P0138, P0141, P0150,
P0151, P0152, P0155,
P0156, P0157, P0158,
P0161, P0201, P0202,
P0203, P0204, P0205,
P0206, P0403, P0443,
P0446
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-16
PROCEDURE 1
EVAPORATIVE EMISSION SYSTEM LEAK MONITOR
DTC
P0441, P0442, P0451, P0452, P0453, P0455, P0456
Drive cycle
pattern
This monitor [from start to ignition switch "LOCK" (OFF) position] will be completed while
traveling with the following drive cycle pattern. It will take 8 minutes. You must complete this
drive twice.
NOTE: . Vehicle speed and throttle opening angle should be within the shaded range.
Inspection
conditions
• Engine coolant temperature: 45°C (113°F) or less (The engine is stopped before the test
drive is started)
• Atmospheric temperature: 5 − 45°C (41 − 113°F)
• Condition of A/T: Selector lever D range
AKX01345
AKX01345
(3)
(2)
(1)
(4)
(5)
200 SECONDS
OR MORE
PREPARATION
PERIOD
ENGINE START
IGNITION
SWITCH:
"LOCK" (OFF)
DURING
MONITOR
150 SECONDS
OR MORE
89 - 97 km/h (55 - 60 mph)
97
(60)
64
(40)
32
(20)
0
100
50
0
VEHICLE SPEED
km/h (mph)
AKX01345 AB
CALCULATED
LOAD (%)
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