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Mitsubishi Montero Sport (2004+). Manual - part 152

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-21

PROCEDURE 5

EXHAUST GAS RECIRCULATION (EGR) SYSTEM MONITOR
DTC

P0401

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 10 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: 80°C (176°F) or more

• Atmospheric temperature: 5°C (41°F) or more

• A/C switch: OFF

• Condition of A/T: Selector lever D range

Test
procedure

1. Engine: start

2. Accelerate until the vehicle speed is 56

− 64 km/h (35 − 40 mph).

3. Travel for 20 seconds or more while keeping the vehicle speed at 56

− 64 km/h (35 − 40

mph).

4. Fully close the throttle from an engine speed of 2,000

− 3,000 r/min, and while keeping

the clutch engaged, decelerate to approximately 900 r/min without applying the brakes.

Do not steer the handle or turn the light ON/OFF during this time. (During monitor)

5. Accelerate until the vehicle speed reaches 56

− 64 km/h (35 − 40 mph), and travel for 20

seconds or more. Then, repeat steps 4 and 5 and complete 8 monitor sessions.

6. Return the vehicle to the shop, then turn the ignition switch to "LOCK" (OFF) position.

7. Confirm that the diagnostic trouble code (DTC) is not output.

8. If DTC P0401 is output, refer to DTC P0401

− EGR Flow Insufficient detected

P.13A-482

AKX01349

(2)

AKX01349

(3)

(5)

(2)

(1)

(4)

20 SECONDS OR MORE
56 - 64 km/h (35 - 40 mph)

20 SECONDS OR MORE

1 ST
MON-
ITOR

7 TH
MON-
ITOR

8 TH
MON-
ITOR

2 ND
MON-
ITOR

ENGINE START

IGNITION
SWITCH:"LOCK"
(OFF)

FULL
DECEL-
ERATION

64
(40)

32
(20)

100

VEHICLE
SPEED
km/h (mph)

AKX01349AB

CALCULATED
LOAD (%)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-22

PROCEDURE 6

OTHER MONITOR (Main components, sensors and switches, wire breakage and short circuit)
DTC

• 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-23

Drive cycle
pattern

Inspection
conditions

• Engine coolant temperature: 80°C (176°F) or more

• Atmospheric temperature: 5°C (41°F) or more

• Condition of A/T: Selector lever D range

Test
procedure

1. Engine: start
2. Accelerate until the vehicle speed is 56

− 64 km/h (35 − 40 mph), and travel for 300

seconds or more.

3. Return the vehicle to the shop.
4. After stopping the vehicle, continue idling for 300 seconds, and then turn the ignition

switch to the "LOCK" (OFF) position. Moreover, the vehicle should be set to the following
conditions for idling.
NOTE: Vehicles for Canada, the headlight, taillight, etc. remain lit even when the lighting
switch is in "OFF" position but this is no problem for checks.
• A/C switch: OFF

• Lights and all accessories: OFF

• Transmission: P range

• Steering wheel: Straightforward position

5. Confirm that the diagnostic trouble code (DTC) is not output.
6. If a DTC is displayed, refer to Diagnostic Trouble Code Chart

P.13A-26

OTHER MONITOR (Main components, sensors and switches, wire breakage and short circuit)

AKX01350

(3)

(2)

(1)

(4)

300 SECONDS OR MORE
56 - 64 km/h (35 - 40 mph)

ENGINE: IDLING
TRANSMISSION: NEUTRAL
300 SECONDS

ENGINE START

IGNITION
SWITCH:"LOCK"
(OFF)

64
(40)

32
(20)

100

VEHICLE
SPEED
km/h (mph)

AKX01350 AB

CALCULATED
LOAD (%)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-24

SYSTEM READINESS TEST STATUS

PURPOSE
The Readiness function also referred as I/M Readi-
ness or I/M Flags indicate if a full diagnostic check
has been "Completed" (is "Ready") for each
non-continuous monitor. Enhanced I/M State Emis-
sion Programs will use the Readiness status (Codes)
to see if the vehicle is ready for OBD-II testing.
"Incomplete" (Not Ready) codes will be one of the
triggers for I/M failure.

OVERVIEW
The PCM monitors the following main diagnosis
items and records whether the evaluation was com-
pleted or is incomplete. The Readiness codes were
established for the I/M programs, thereby confirming
that the vehicle was not tampered with by erasing the
diagnostic trouble code(s) (DTC's) before I/M testing.
The Readiness and DTC codes can be reset by dis-
connecting the battery or by erasing the codes with a
scan tool. For this reason all Readiness codes must
read "Complete" before I/M testing.

When the monitors run and complete, the scan tool
will record the Readiness Code as " Complete "
(General Scan Tools record as " Ready "). When the
vehicle is operating normally and the OBD-II Drive
Cycle is carried out, Readiness Code will set as "
Complete " on the first drive cycle. If during the first
drive cycle a fault is detected then, a second drive is
required before the Readiness Code will " Complete.
" If the fault is still there, then a DTC will set.

• Catalyst: P0421, P0431

• Evaporative system: P0441, P0442, P0455,

P0456

• Heated oxygen sensor: P0130, P0131, P0132,

P0133, P0134, P0136, P0137, P0138, P0139,
P0150, P0151, P0152, P0153, P0154, P0156,
P0157, P0158, P0159

• Heated oxygen sensor heater: P0135, P0141,

P0155, P0161

• EGR system: P0401

After the Readiness is "Complete," the technician is
assured that any DTC's associated with that monitor
will be displayed if the system has a problem. That is
why some State's I/M programs require the Readi-
ness Code as "Complete" before they check for
DTC's.
NOTE: After a repair is made for a DTC the techni-
cian should drive the OBD-II drive cycle checking
that the MB991958 records all Readiness as "Com-
plete".

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