Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 80

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-19

READINESS TEST STATUS

PURPOSE
The Readiness function also referred as I/M
Readiness or I/M Flags indicate if a full diagnostic
check has been "Completed" (is "Ready") for each
non-continuous monitor. Enhanced I/M State
Emission 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
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 disconnecting 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 MUT-II will
record the Readiness Code as "Complete" (General
Scan Tools record as "Ready"). If the monitor did not
run completely, the system then reads as
"Incomplete" (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
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

•

Evaporative system: P0442, P0455

•

Heated oxygen sensor: P0130,P0133,
P0136,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
Readiness Code as "Complete" before they check
for DTC's.

NOTE: After a repair is mode for a DTC the
technician should drive the OBD-II drive cycle
checking that the MUT-II records all Readiness as
"Complete".

FAIL-SAFE/BACKUP FUNCTION TABLE

M1131009100065

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

MALFUNCTION ITEM

CONTROL CONTENTS DURING MALFUNCTION

Volume air flow sensor

1. 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.

2. 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 simultaneously into all cylinders. (After the ignition switch is turned to

the "ON" position, 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.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-20

DIAGNOSTIC TROUBLE CODE CHART

M1131008700150

Communication line with
transaxle control CPU

No ignition timing retard control (overall engine-transaxle control) achieved
when transaxle speeds are changed.

Generator FR terminal

Does not restrict the generator output with respect to electrical load.

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.

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.

MALFUNCTION ITEM

CONTROL CONTENTS DURING MALFUNCTION

DTC CODE

DIAGNOSTIC ITEMS

REFERENCE
PAGE

P0101

Volume air flow circuit range/performance problem

P.13A-26

P0102

Volume air flow circuit low input

P.13A-33

P0103

Volume air flow circuit high input

P.13A-36

P0107

Barometric pressure circuit low input

P.13A-42

P0108

Barometric pressure circuit high input

P.13A-52

P0111

Intake air temperature circuit range/performance problem

P.13A-59

P0115

Engine coolant temperature circuit high input

P.13A-68

P0116

Engine coolant temperature circuit range/performance problem

P.13A-76

P0117

Engine coolant temperature circuit low input

P.13A-82

P0121

Throttle position circuit range/performance problem

P.13A-90

P0122

Throttle position circuit low input

P.13A-98

P0123

Throttle position circuit high input

P.13A-103

P0128

Coolant thermostat malfunction

P.13A-108

P0130

Sensor circuit malfunction (sensor 1)

P.13A-109

P0133

Sensor circuit slow response (sensor 1)

P.13A-118

P0134O

Sensor circuit no activity detected (sensor 1)

P.13A-120

P0135

Sensor heater circuit malfunction (sensor 1)

P.13A-126

P0136

Sensor circuit malfunction (sensor 2)

P.13A-133

P0139

Sensor circuit slow response (sensor 2)

P.13A-142

P0141

Sensor heater circuit malfunction (sensor 2)

P.13A-145

P0171

System too lean

P.13A-151

P0172

System too rich

P.13A-157

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-21

P0201

Injector circuit malfunction

−

Cylinder 1

P.13A-161

P0202

Injector circuit malfunction

−

Cylinder 2

P0203

Injector circuit malfunction

−

Cylinder 3

P0204Injector circuit malfunction

−

Cylinder 4

P0300

Random misfire detected

P.13A-167

P0301

Cylinder 1 misfire detected

P.13A-172

P0302

Cylinder 2 misfire detected

P0303

Cylinder 3 misfire detected

P0304Cylinder 4

misfire detected

P0325

Knock sensor 1 circuit malfunction

P.13A-176

P0335

Crankshaft position sensor circuit malfunction

P.13A-181

P0340

Camshaft position sensor circuit malfunction

P.13A-191

P0401

Exhaust gas recirculation flow insufficient detected

P.13A-199

P0403

Exhaust gas recirculation solenoid malfunction

P.13A-201

P0421

Warm up catalyst efficiency below threshold

P.13A-208

P0442

Evaporative emission control system leak detected

P.13A-211

P0443

Evaporative emission control system purge control valve circuit
malfunction

P.13A-221

P0446

Evaporative emission control system vent control malfunction

P.13A-229

P0450

Evaporative emission control system pressure sensor malfunction

P.13A-236

P0451

Evaporative emission control system pressure sensor range/performance

P.13A-250

P0455

Evaporative emission control system leak detected (Gross leak)

P.13A-264

P0500

Vehicle speed sensor malfunction

<M/T>

P.13A-

280

, <A/T>

P.13A-288

P0506

Idle control system rpm lower than expected

P.13A-290

P0507

Idle control system rpm higher than expected

P.13A-299

P0551

Power steering pressure sensor circuit range/performance

P.13A-307

P0705

Transmission range
sensor circuit
malfunction (PRNDL
input)

•

A/T DTC No.27 (Park/Neutral position
switch system: Open circuit)

•

A/T DTC No.28 (Park/Neutral position
switch system: Short circuit)

P.13A-313

P0710

Transmission fluid
temperature sensor
circuit malfunction

•

A/T DTC No.15 (Oil temperature sensor
system: Open circuit)

•

A/T DTC No.16 (Oil temperature sensor
system: Short circuit)

P.13A-314

P0715

Input/turbine speed
sensor circuit
malfunction

•

A/T DTC No.22 (Input shaft speed sensor
system)

P.13A-315

P0720

Output speed sensor
circuit malfunction

•

A/T DTC No.23 (Output shaft speed sensor
system)

P.13A-316

DTC CODE

DIAGNOSTIC ITEMS

REFERENCE
PAGE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-22

NOTE: Do not replace the engine control module (ECM) <M/T> or powertrain control module (PCM) <A/T>
until a through terminal check reveals there are no short/open circuits.

NOTE: Check that the ECM <M/T> or PCM <A/T> ground circuit is normal before checking for the cause of
the problem.

NOTE: After the ECM <M/T> or PCM <A/T> detects a malfunction, a diagnostic trouble code is recorded the
next time the engine is started and the same malfunction is re-detected. However, for items marked with a "*,"
the diagnostic trouble code is recorded on the first detection of the malfunction.

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.

SYMPTOM CHART

M1131008800157

NOTE: Check that the engine control module (ECM) <M/T> or powertrain control module (PCM) <A/T>
ground circuit is normal before checking for the cause of the problem.

P0725

Engine speed input
circuit malfunction

•

A/T DTC No.21 (Crankshaft position sensor
system)

P.13A-317

P0740

Torque converter clutch
system malfunction

•

A/T DTC No.36 (Torque converter clutch
solenoid system: Short circuit/Open circuit)

•

A/T DTC No.52 (Torque converter clutch
solenoid system: Faulty system)

•