Mitsubishi Montero (2004+). Manual — part 132
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-15
MUT-III 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
(engine speed)
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 trim (trim)
bank1
%
LONG TRIM B2
83
Long-term fuel trim (trim)
bank2
%
MAP/MDP SNSR.
32
Manifold absolute pressure
sensor
kPa
SHORT TRIM B1
82
Short-term fuel trim (trim)
bank1
%
SHORT TRIM B2
84
Short-term fuel trim (trim)
bank2
%
SYS. STATUS B1
88
Fuel control system status
bank 1 (right)
• Open loop
• Closed loop
• Open loop-drive condition
• Open loop-DTC set
• Closed loop-O
2
(rear)
failed
SYS. STATUS B2
89
Fuel control system status
bank 2 (left)
• 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
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-16
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 driving the OBD-II drive cycle. Erase
the DTC if it has been output.
DRIVE CYCLE PATTERN LIST
PROCEDURE 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
P0134, P0154, P0300,
P0301, P0302, P0303,
P0304, P0305, P0306,
P0506, P0507, P1400
Sensors and switches
P0101, P0102, P0106,
P0107, P0108, P0111,
P0112, P0113, P0116,
P0117, P0118, P0125,
P0181, P0182, P0183,
P0335, P0340, P0461
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-17
.
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 driving the
vehicle 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 (%)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-18
.
Test procedure
1. Engine: start
2. Accelerate until the vehicle speed is 89
− 97 km/h (55 − 60 mph).
3. Travel for 200 seconds or more while keeping the vehicle speed at 89
− 97 km/h (55 − 60 mph).
4. While keeping the accelerator pedal opening degree constant, keep the vehicle speed at 89
− 97
km/h (55
− 60 mph) and travel for 150 seconds or more. (During monitor)
5. Return the vehicle to the shop, then turn the ignition switch to "LOCK" (OFF) position.
6. Confirm that the diagnostic trouble code (DTC) is not output.
7. If DTC P0441 is output, refer to DTC P0441
− Evaporative Emission Control System Incorrect
Purge Flow
P.13A-521
.
If DTC P0442 is output, refer to DTC P0442
− Evaporative Emission Control System Leak
Detected (Small Leak)
P.13A-525
.
If DTC P0451 is output, refer to DTC P0451
− Evaporative Emission Control System Pressure
Sensor Range/performance
P.13A-558
.
If DTC P0452 is output, refer to DTC P0452
− Evaporative Emission Control System Pressure
Sensor Low Input
P.13A-575
.
If DTC P0453 is output, refer to DTC P0453
− Evaporative Emission Control System Pressure
Sensor High Input
P.13A-592
.
If DTC P0455 is output, refer to DTC P0455
− Evaporative Emission Control System Leak
Detected (Gross Leak)
P.13A-609
.
If DTC P0456 is output, refer to DTC P0456
− Evaporative Emission Control System Leak
Detected (Very Small Leak)
P.13A-630
.
EVAPORATIVE EMISSION SYSTEM LEAK MONITOR
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