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