Mitsubishi Colt Ralliart. Manual — part 673

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-17

NOTE: The engine warning lamp is caused to flash when the electronic-controlled throttle valve system is
deactivated.

Camshaft position
sensor

• The ECU resumes the conditions having existed before the sensor

malfunction was determined and use them for the subsequent control.

• The ECU cuts fuel supply 4 seconds after detection of the malfunction (only

when the No. 1 cylinder top dead center is not sensed at all after the ignition
switch is turned to ON).

Throttle valve control
microcomputer

The ECU controls the engine output with the electronic-controlled throttle valve
system deactivated.

Alternator FR terminal The ECU prohibits the control in which the alternator output is limited depending

on electric load (as a result, the alternator operates free of such a control).

Throttle valve control
servo

The ECU controls the engine output with the electronic-controlled throttle valve
system deactivated.

Throttle valve position
feedback

The ECU controls the engine output with the electronic-controlled throttle valve
system deactivated.

Accelerator pedal
position sensor (sub)

• The ECU determines the accelerator pedal position using the signals from

the accelerator pedal position sensor (main). However, the pedal stroke
position thus determined is interpreted as approximately a half of the normal
state position.

• The ECU cuts off fuel supply when the engine speed exceeds 3,000 r/min.

• When the accelerator pedal position sensor (main) is also malfunctioning,

the ECU deactivates the electronic-controlled throttle valve system and limits
the engine output to a certain low level.

Manifold absolute
pressure sensor

The ECU performs control assuming a 101 kPa manifold absolute pressure.

Malfunctioning item Control detail

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-18

INSPECTION CHART FOR DIAGNOSIS CODES

M1131151002426

CAUTION

If the ignition switch is turned to the ON position with a connector or other electrical connections dis-
connected during troubleshooting of a system, a diagnosis code may be set for other systems. After
finishing troubleshooting, check diagnosis codes for all systems, and if any codes have been set,
erase these codes.

Code

Diagnosis item

Reference page

P0011

Variable valve timing system

P.13B-24

P0090

Fuel pressure solenoid valve system

P.13B-25

P0100

Air flow sensor system

P.13B-31

P0105

Barometric pressure sensor system

P.13B-37

P0110

Intake air temperature sensor system

P.13B-38

P0115

Engine coolant temperature sensor system

P.13B-45

P0122

Throttle position sensor (main) circuit low input

P.13B-53

P0123

Throttle position sensor (main) circuit high input

P.13B-57

P0125

Feedback system monitor

P.13B-60

P0130

Oxygen sensor (front) system

P.13B-65

P0135

Oxygen sensor (front) heater system

P.13B-72

P0136

Oxygen sensor (rear) system

P.13B-78

P0141

Oxygen sensor heater (rear) system

P.13B-84

P0170

Abnormal fuel system

P.13B-90

P0201

No. 1 injector system

P.13B-92

P0202

No. 2 injector system

P.13B-97

P0203

No. 3 injector system

P.13B-102

P0204

No. 4 injector system

P.13B-107

P0222

Throttle position sensor (sub) circuit low input

P.13B-112

P0223

Throttle position sensor (sub) circuit high input

P.13B-116

P0243

Waste gate solenoid valve system

P.13B-119

P0300

Random/multiple cylinder misfire detected

P.13B-125

P0301

No. 1 cylinder misfire detected

P.13B-126

P0302

No. 2 cylinder misfire detected

P.13B-129

P0303

No. 3 cylinder misfire detected

P.13B-132

P0304

No. 4 cylinder misfire detected

P.13B-135

P0325

Detonation sensor system

P.13B-138

P0335

Crank angle sensor system

P.13B-142

P0340

Camshaft position sensor system

P.13B-151

P0421

Warm up catalyst malfunction

P.13B-160

P0443

Purge control solenoid valve system

P.13B-161

P0500

Vehicle speed signal system

P.13B-166

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-19

P0513

Immobilizer malfunction

P.13B-167

P0603

EEP ROM system

P.13B-169

P0606

Microcomputer malfunction

P.13B-169

P0622

Alternator FR terminal system

P.13B-170

P0638

Throttle valve control circuit range/performance problem

P.13B-174

P0642

Throttle position sensor power supply

P.13B-177

P0657

Throttle valve control servo relay circuit malfunction

P.13B-178

P1021

Oil feeder control valve system

P.13B-188

P1231

Trustfui check ASC

P.13B-194

P1233

Trustful check throttle position sensor (main)

P.13B-194

P1234

Trustful check throttle position sensor (sub)

P.13B-195

P1235

Trustful check air flow sensor/manifold absolute pressure senor

P.13B-195

P1236

A/D converter system

P.13B-196

P1237

Trustful check accelerator pedal position sensor

P.13B-196

P1238

Air flow sensor trustful for torque monitoring

P.13B-197

P1239

Trustful check engine speed

P.13B-198

P1240

Trustful check ignition angle

P.13B-198

P1241

Torque monitoring

P.13B-199

P1602

Communication malfunction (btween engine-ECU main processor
and system LSI)

P.13B-201

P1603

Battery backup circuit Malfunction

P.13B-202

P2100

Throttle valve control servo circuit (open)

P.13B-205

P2101

Throttle valve control servo magneto malfunction

P.13B-209

P2108

Throttle valve control servo processor malfunction

P.13B-212

P2122

Accelerator pedal position sensor (main) circuit low input

P.13B-212

P2123

Accelerator pedal position sensor (main) circuit high input

P.13B-217

P2127

Accelerator pedal position sensor (sub) circuit low input

P.13B-220

P2128

Accelerator pedal position sensor (sub) circuit high input

P.13B-224

P2135

Throttle position sensor (main and sub) range/performance problem

P.13B-227

P2138

Accelerator pedal position sensor (main and sub) range/performance
problem

P.13B-229

U1073

Bus off

P.13B-235

U1102

ABS-ECU time-out

P.13B-236

U1106

EPS time-out

P.13B-237

U1108

Combination meter time-out

P.13B-239

U1110

A/C-ECU time-out

P.13B-240

Code

Diagnosis item

Reference page

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-20

INSPECTION CHART FOR TROUBLE
SYMPTOMS

M1131151501956

Items

Trouble symptom

Inspection
procedure
No.

Communication
with M.U.T.-III is
impossible

Communication with engine-ECU is not Possible

1

Engine warning
lamp

The engine warning lamp does not illuminate right after the ignition switch
is turned to the ON position

2

The engine warning lamp remains illuminating and never goes out

3

Starting

Starting impossible (No initial
combustion)

The starter is impossible to operate.

4

Starting impossible (Starter
operative but no initial combustion)

The starter is operative and cranks
the engine, but no combustion takes
place in cylinders and thus the engine
is not started.

5

Starting impossible (Initial
combustion but no complete
combustion)

Initial combustion occurs but the
engine stalls soon later due to
incomplete combustion.

6

Improper starting (Long time to
start)

It takes long cranking time to start the
engine.

Improper idling

Unstable idling (Rough idling,
hunting)

Engine speed is not constant (varies)
during idling. This condition is usually
detectable by movement of the
tachometer needle as well as by
engine vibration transmitted to the
steering wheel, shift lever, vehicle
body, and so on.

7

Improper idling speed (Too high or
too low)

The idling speed is not within the
normal speed range.

Engine stalls during idling (Die out) The engine stalls during idling

regardless of vehicle movement.

Engine stalls

The engine stalls when starting the
car (Pass Out)

The engine stalls during operation or
when the accelerator pedal is
depressed while the engine is idling.

8

The engine stalls when decelerating The engine stalls when the vehicle

decelerates.

Main

Index

Group

TOC