Mitsubishi Eclipse. Manual — part 128

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-5

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TROUBLESHOOTING STRATEGY

M1131150000513

Use these steps to plan your diagnostic strategy. If
you follow them carefully, you will be sure to have
exhausted most of the possible ways to find an MFI
fault.
1. Gather as much information as possible about the

complaint from the customer.

2. Verify that the condition described by the

customer exists.

3. Check the vehicle for any MFI Diagnostic Trouble

Code (DTC).

4. If you cannot verify the condition and there are no

DTCs, the malfunction is intermittent. For
information on how to cope with intermittent
malfunctions, refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points

− How

to cope with Intermittent Malfunction

P.00-6

.

5. If you can verify the condition but there are no

DTCs, or the system cannot communicate with
the scan tool, refer to the trouble symptom
classification table.

6. If there is a DTC, record the number of the code,

then erase the code from the memory using the
scan tool.

NOTE: If a DTC is erased, its "freeze frame" data will
be also erased and the system readiness test status
will be reset. If necessary, store the "freeze frame"
data before erasing the DTC.
7. Reconfirm the malfunction symptom and carry out

a test drive with the drive cycle pattern.

8. If DTC is set again, carry out an inspection with

the inspection procedure for diagnostic trouble
codes of that code.

9. If DTC is not set again, the malfunction is

intermittent. For information on how to cope with
intermittent malfunctions, refer to GROUP 00,
How to Use Troubleshooting/Inspection Service
Points

− How to cope with Intermittent Malfunction

P.00-6

.

10.After repairs are completed, conduct a road test

duplicating the complaint set conditions to confirm
the malfunction has been eliminated.

NOTE: If the engine control module (ECM) <M/T> or
powertrain control module (PCM) <A/T> is replaced,
Immobilizer Encrypted Code Registration should be
carried out. Refer to GROUP 54A, Ignition Switch

−

On-vehicle Service

−

Immobilizer Encrypted Code

Registration

P.54A-33

.

DIAGNOSTIC FUNCTION

M1131155500159

.

MALFUNCTION INDICATOR LAMP (SERVICE ENGINE
SOON OR CHECK ENGINE LAMP)
Among the on-board diagnostic items, a Malfunction Indicator
Lamp (SERVICE ENGINE SOON or Check Engine Lamp) illu-
minates to notify the driver of an emission control malfunction.
However, when an irregular signal returns to normal and the
engine control module (ECM) <M/T> or powertrain control
module (PCM) <A/T> judges that it has returned to normal, the
Malfunction Indicator Lamp (SERVICE ENGINE SOON or
Check Engine Lamp) is switched off.
Moreover, when the ignition switch is turned off, the lamp is
switched off. Even if the ignition switch is turned on again, the
lamp does not illuminate until the malfunction is detected.
Immediately after the ignition switch is turned on, the Malfunc-
tion Indicator Lamp (SERVICE ENGINE SOON or Check
Engine Lamp) is lit for 20 seconds to indicate that the Malfunc-
tion Indicator Lamp (SERVICE ENGINE SOON or Check
Engine Lamp) operates normally.

.

AK000054

AB

MALFUNCTION INDICATOR LAMP

(SERVICE ENGINE SOON OR

CHECK ENGINE LAMP)

AD

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L>

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Items Indicated by the Malfunction Indicator Lamp (SERVICE ENGINE SOON or Check Engine Lamp)

DTC NO.

ITEMS

−

Engine control module (ECM) <M/T> or Powertrain control module (PCM) <A/T> malfunction

P0101*

Volume airflow circuit range/performance problem

P0102*

Volume airflow circuit low input

P0106

Manifold absolute pressure circuit range/performance problem

P0107

Manifold absolute pressure circuit low input

P0108

Manifold absolute pressure circuit high input

P0111*

Intake air temperature circuit range/performance problem

P0112*

Intake air temperature circuit low input

P0113*

Intake air temperature circuit high input

P0116*

Engine coolant temperature circuit range/performance problem

P0117*

Engine coolant temperature circuit low input

P0118*

Engine coolant temperature circuit high input

P0121*

Throttle position sensor circuit range/performance problem

P0122*

Throttle position sensor circuit low input

P0123*

Throttle position sensor circuit high input

P0125*

Insufficient coolant temperature for closed loop fuel control

P0128

Coolant thermostat (Coolant temperature below thermostat regulating temperature)

P0130

Heated oxygen sensor circuit (sensor 1)

P0131

Heated oxygen sensor circuit low voltage (sensor 1)

P0132

Heated oxygen sensor circuit high voltage (sensor 1)

P0133

Heated oxygen sensor circuit slow response (sensor 1)

P0134*

Heated oxygen sensor circuit no activity detected (sensor 1)

P0135

Heated oxygen sensor heater circuit (sensor 1)

P0136

Heated oxygen sensor circuit (sensor 2)

P0137

Heated oxygen sensor circuit low voltage (sensor 2)

P0138

Heated oxygen sensor circuit high voltage (sensor 2)

P0139

Heated oxygen sensor circuit slow response (sensor 2)

P0141

Heated oxygen sensor heater circuit (sensor 2)

P0171

System too lean

P0172

System too rich

P0181

Fuel tank temperature sensor circuit range/performance

P0182

Fuel tank temperature sensor circuit low input

P0183

Fuel tank temperature sensor circuit high input

P0201

Injector circuit-cylinder 1

P0202

Injector circuit-cylinder 2

P0203

Injector circuit-cylinder 3

P0204

Injector circuit-cylinder 4

P0300

Random/multiple cylinder misfire detected

P0301

Cylinder 1 misfire detected

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L>

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P0302

Cylinder 2 misfire detected

P0303

Cylinder 3 misfire detected

P0304

Cylinder 4 misfire detected

P0335*

Crankshaft position sensor circuit

P0340*

Camshaft position sensor circuit

P0401

EGR flow insufficient detected

P0403

EGR control circuit

P0421

Warm up catalyst efficiency below threshold

P0441

Evaporative emission control system incorrect purge flow

P0442

Evaporative emission control system leak detected (Small leak)

P0443

Evaporative emission control system purge control valve circuit

P0446

Evaporative emission control system vent control circuit

P0451

Evaporative emission control system pressure sensor range/performance

P0452

Evaporative emission control system pressure sensor low input

P0453

Evaporative emission control system pressure sensor high input

P0455

Evaporative emission control system leak detected (Gross leak)

P0456

Evaporative emission control system leak detected (Very small leak)

P0461

Fuel level sensor circuit range/performance

P0500*

Vehicle speed sensor <M/T>

P0506

Idle control system RPM lower than expected

P0507

Idle control system RPM higher than expected

P0513

Immobilizer malfunction

P0551

Power steering pressure sensor circuit range/performance

P0554

Power steering pressure switch circuit intermittent

P0705

Transmission range switch circuit malfunction (RPNDL input)

P0712*

Transmission fluid temperature sensor circuit low input

P0713*

Transmission fluid temperature sensor circuit high input

P0715*

Input/Turbine speed sensor circuit

P0720*

Output speed sensor circuit

P0731*

Gear 1 incorrect ratio

P0732*

Gear 2 incorrect ratio

P0733*

Gear 3 incorrect ratio

P0734*

Gear 4 incorrect ratio

P0736*

Gear R incorrect ratio

P0741

Torque converter clutch circuit performance or stuck off

P0742

Torque converter clutch circuit stuck on

P0743*

Torque converter clutch circuit electrical

P0753*

Shift solenoid "A" electrical

P0758*

Shift solenoid "B" electrical

P0763*

Shift solenoid "C" electrical

DTC NO.

ITEMS

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L>

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NOTE: If the Malfunction Indicator Lamp (SERVICE ENGINE SOON or Check Engine Lamp) illuminates
because of a malfunction of the engine control module (ECM) <M/T> or powertrain control module (PCM)
<A/T>, transmission between scan tool and the ECM <M/T> or PCM <A/T> is impossible. In this case, the
diagnostic trouble code (DTC) cannot be read.
NOTE: After the ECM <M/T> or PCM <A/T> has detected a malfunction, the Malfunction Indicator Lamp
(SERVICE ENGINE SOON or Check Engine Lamp) illuminates when the engine is next turned on and the
same malfunction is re-detected. However, for items marked with a "*" in the DTC NO column, the Malfunc-
tion Indicator Lamp (SERVICE ENGINE SOON or Check Engine Lamp) illuminates on the first detection of
the malfunction.
NOTE: After the Malfunction Indicator Lamp (SERVICE ENGINE SOON or Check Engine Lamp) illuminates,
it will be switched off under the following conditions.

.

•

When the ECM <M/T> or PCM <A/T> monitored the power train malfunction three times* it met set condi-
tion requirements, it detected no malfunction. *: In this case, "one time" indicates from engine start to stop.

•

For misfiring or a fuel trim malfunction, when driving conditions (engine speed, engine coolant tempera-
ture, etc.) are similar to those when the malfunction was first recorded.

NOTE: Sensor 1 indicates the sensor mounted at a position closest to the engine, and sensor 2 indicates the
sensor mounted at the position second closest to the engine.

P0768*

Shift solenoid "D" electrical

P1603*

Battery backup circuit malfunction

P1751*

A/T control relay malfunction

P2227*

Barometric pressure circuit range/performance problem

P2228*

Barometric pressure circuit low input

P2229*

Barometric pressure circuit high input

DTC NO.

ITEMS