Mitsubishi Eclipse. Manual — part 132

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-21

PROCEDURE 5

EXHAUST GAS RECIRCULATION (EGR) SYSTEM MONITOR
DTC

P0401

Drive cycle
pattern

This monitor [from start to ignition switch to the "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). (M/T: 4th speed)

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 (M/T: 4th speed). 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-449

AKX01349

(2)

AKX01349

(3)

(5)

(2)

(1)

(4)

20 SECONDS OR MORE
56 - 64 km/h (35 - 40 mph)
M/T: 4TH SPEED

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) POSITION

FULL
DECEL-
ERATION

64
(40)

32
(20)

100

VEHICLE
SPEED
km/h (mph)

CALCULATED
LOAD (%)

AKX01349AE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-22

PROCEDURE 6

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

• Main components: P0106, P0107, P0108, P0134, P0300, P0301, P0302, P0303, P0304,

P0506, P0507

• Sensors and switches: P0101, P0102, P0111, P0112, P0113, P0116, P0117, P0118,

P0121, P0122, P0123, P0125, P0181, P0182, P0183, P0335, P0340, P0461, P2227,
P2228, P2229

• Wire breakage and short circuit: P0130, P0131, P0132, P0135, P0136, P0137, P0138,

P0141, P0201, P0202, P0203, P0204, P0403, P0443, P0446

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

AKX01350

(3)

(2)

(1)

(4)

300 SECONDS OR MORE
56 - 64 km/h (35 - 40 mph)
M/T: 4TH SPEED

ENGINE: IDLING
TRANSMISSION: NEUTRAL
300 SECONDS

ENGINE START

IGNITION
SWITCH:"LOCK"
(OFF) POSITION

64
(40)

32
(20)

100

VEHICLE
SPEED
km/h (mph)

CALCULATED
LOAD (%)

AKX01350 AE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-23

SYSTEM REDINESS 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 engine control module (ECM) <M/T> or
powertrain control module (PCM) <A/T> monitors the
following main diagnosis items and records whether
the evaluation was completed or is incomplete. The
Readiness codes were established for the I/M pro-
grams, 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 disconnecting the
battery or by erasing the codes with a scan tool. For
this reason all Readiness codes must read "Com-
plete" before I/M testing.

When the monitors run and complete, the scan tool
will record the Readiness Code as "Complete" (Gen-
eral Scan Tools record as "Ready"). If the monitor did
not run completely, the system then reads as "Incom-
plete" (General Scan Tools record as "Not 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 dur-
ing the first drive cycle a fault is detected then, a sec-
ond drive is required before the Readiness Code will
"Complete". If the fault is still there, then a DTC will
set.

• Catalyst: P0421

• Evaporative system: P0441, P0442, P0455,

P0456

• Heated oxygen sensor: P0130, P0131, P0132,

P0133, P0134, P0136, P0137, P0138, P0139

• Heated oxygen sensor heater: P0135, P0141

• 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 mode for a DTC the techni-
cian should drive the OBD-II drive cycle checking
that the MB991958 records all Readiness as "Com-
plete".

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. (M/T: 4th speed)

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.
• A/C switch: OFF

• Lights and all accessories: OFF

• Transmission: Neutral

• 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-24

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

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-24

FAIL-SAFE FUNCTION REFERENCE TABLE

M1131153000277

When the main sensor malfunctions are detected by the diagnostic test mode, the vehicle is controlled by
means of the following defaults.

DIAGNOSTIC TROUBLE CODE CHART

M1131151000709

MALFUNCTION ITEM

CONTROL CONTENTS DURING MALFUNCTION

Volume Airflow Sensor

• Uses the throttle position sensor signal and engine speed signal (crankshaft

position sensor signal) for basic injector drive time and basic ignition timing
from the pre-set mapping.

• Fixes the IAC motor in the appointed position so idle air control is not

performed.

Intake air temperature
sensor

Controls as if the intake air temperature is 25

°C (77°F).

Throttle position sensor

No increase in fuel injection amount during acceleration due to the unreliable
throttle position sensor signal.

Engine coolant
temperature sensor

Controls as if the engine coolant temperature is 80

°C (176°F). (This control will

be continued until the ignition switch is turned to the "LOCK" (OFF) position
even though the sensor signal returns to normal.)

Camshaft position sensor Injects fuel into the cylinders in the order 1-3-4-2 with irregular timing. (After the

ignition switch is turned to the "ON," the No. 1 cylinder top dead center is not
detected at all.)

Barometric pressure
sensor

Controls as if the barometric pressure is 101 kPa (30 in Hg).

Knock sensor

Switches the ignition timing from ignition timing for high octane to ignition timing
for standard octane fuel.

Heated oxygen sensor
<front>

Air/fuel ratio closed loop control is not performed.

Heated oxygen sensor
<rear>

Performs the closed loop control of the air/fuel ratio by using only the signal of
the heated oxygen sensor (front) installed on the front side of the catalytic
converter.

Generator FR terminal

No generator output suppression control is performed for the electrical load (to
be operated as an ordinary generator).

Misfire detection

The ECM <M/T> or PCM <A/T> stops supplying fuel to the cylinder with the
highest misfiring rate if a misfiring that could damage the catalytic converter is
detected.

DTC
CODE

DIAGNOSTIC ITEMS

REFERENCE
PAGE

P0101*

Volume airflow circuit range/performance problem

P.13A-31

P0102*

Volume airflow circuit low input

P.13A-42

P0106

Manifold absolute pressure circuit range/performance problem

P.13A-53