Mitsubishi Galant. Manual - part 198

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-17

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: . Drive according to the graph below.

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

Engine: start
Accelerate until the vehicle speed is 56

−

64 km/h (35

−

40 mph), and travel for 300 seconds

or more.

Return the vehicle to the shop.
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

•

Transaxle: P range

•

Steering wheel: Straightforward position

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

P.13B-19

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)

<REFERENCE>
THROTTLE
OPENING
ANGLE (%)

AKX01350 AB

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-18

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 powertrain control module (PCM) 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 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 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, P0431

•

Evaporative system: P0442, P0455

•

Heated oxygen sensor:
P0130,P0133,P0136,P0139,P0150,P0153,P015
6,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
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

M1131009100098

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).

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-19

DIAGNOSTIC TROUBLE CODE CHART

M1131008700116

Knock sensor

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

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 PCM 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.13B-25

P0102

Volume air flow circuit low input

P.13B-31

P0103

Volume air flow circuit high input

P.13B-34

P0107

Barometric pressure circuit low input

P.13B-40

P0108

Barometric pressure circuit high input

P.13B-49

P0111

Intake air temperature circuit range/performance problem

P.13B-56

P0115

Engine coolant temperature circuit high input

P.13B-65

P0116

Engine coolant temperature circuit range/performance problem

P.13B-73

P0117

Engine coolant temperature circuit low input

P.13B-78

P0121

Throttle position circuit range/performance problem

P.13B-86

P0122

Throttle position circuit low input

P.13B-94

P0123

Throttle position circuit high input

P.13B-100

P0128

Coolant thermostat malfunction

P.13B-105

P0130

Sensor circuit malfunction (bank 1 sensor 1)

P.13B-107

P0133

Sensor circuit slow response (bank 1 sensor 1)

P.13B-116

P0134

Sensor circuit no activity detected (bank 1 sensor 1)

P.13B-118

P0135

Sensor heater circuit malfunction (bank 1 sensor 1)

P.13B-125

P0136

Sensor circuit malfunction (bank 1 sensor 2)

P.13B-132

P0139

Sensor circuit slow response (bank 1 sensor 2)

P.13B-141

P0141

Sensor heater circuit malfunction (bank 1 sensor 2)

P.13B-144

P0150

Sensor circuit malfunction (bank 2 sensor 1)

P.13B-151

P0153

Sensor circuit slow response (bank 2 sensor 1)

P.13B-159

P0154

Sensor circuit no activity detected (bank 2 sensor 1)

P.13B-161

P0155

Sensor heater circuit malfunction (bank 2 sensor 1)

P.13B-167

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-20

P0156

Sensor circuit malfunction (bank 2 sensor 2)

P.13B-174

P0159

Sensor circuit slow response (bank 2 sensor 2)

P.13B-182

P0161

Sensor heater circuit malfunction (bank 2 sensor 2)

P.13B-185

P0171

System too lean (bank 1)

P.13B-191

P0172

System too rich (bank 1)

P.13B-198

P0174

System too lean (bank 2)

P.13B-203

P0175

System too rich (bank 2)

P.13B-208

P0201

Injector circuit malfunction

−

Cylinder 1

P.13B-212

P0202

Injector circuit malfunction

−

Cylinder 2

P.13B-220

P0203

Injector circuit malfunction

−

Cylinder 3

P.13B-212

P0204

Injector circuit malfunction

−

Cylinder 4

P.13B-220

P0205

Injector circuit malfunction

−

Cylinder 5

P.13B-212

P0206

Injector circuit malfunction

−

Cylinder 6

P.13B-220

P0300

Random misfire detected

P.13B-226

P0301

Cylinder 1 misfire detected

P.13B-232

P0302

Cylinder 2 misfire detected

P0303

Cylinder 3 misfire detected

P0304

Cylinder 4 misfire detected

P0305

Cylinder 5 misfire detected

P0306

Cylinder 6 misfire detected

P0325

Knock sensor 1 circuit malfunction

P.13B-236

P0335

Crankshaft position sensor circuit malfunction

P.13B-240

P0340

Camshaft position sensor circuit malfunction

P.13B-249

P0401

Exhaust gas recirculation flow insufficient detected

P.13B-256

P0403

Exhaust gas recirculation solenoid malfunction

P.13B-258

P0421

Warm up catalyst efficiency below threshold (bank 1)

P.13B-264

P0431

Warm up catalyst efficiency below threshold (bank 2)

P.13B-266

P0442

Evaporative emission control system leak detected

P.13B-269

P0443

Evaporative emission control system purge control valve circuit malfunc-
tion

P.13B-279

P0446

Evaporative emission control system vent control malfunction

P.13B-286

P0450

Evaporative emission control system pressure sensor malfunction

P.13B-293

P0451

Evaporative emission control system pressure sensor range/performance

P.13B-306

P0455

Evaporative emission control system leak detected (Gross leak)

P.13B-320

P0500

Vehicle speed sensor malfunction

P.13B-337

P0506

Idle control system rpm lower than expected

P.13B-338

P0507

Idle control system rpm higher than expected

P.13B-347

DTC CODE

DIAGNOSTIC ITEMS

REFERENCE
PAGE

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