Mitsubishi Galant (2004+). Manual — part 1228

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-605

DTC P0340: Camshaft Position Sensor Circuit

CAUTION

If DTC P0340 has been set, TCL related DTC
U1120 is also set. After P0340 has been diag-
nosed, don't forget to erase DTC U1120.

RED-

WHITE

RED-

WHITE

AK302858

RED

BR

O

W

N

BLUE-

YELLO

W

MFI RELAY

BATTERY

104

1

2

4

B-17X

5V

POWERTRAIN
CONTROL
MODULE (PCM)

3

1 2

B-106

(MU802337)

2

1

3

CAMSHAFT
POSITION
SENSOR

3

Camshaft Position Sensor Circuit

113

B-22

RED-

WHITE

1

2

3

4

100

99

92

91

93 94 95

96 97 98

101 102 103 104

105 106 107 108

109 110 111 112 113

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-606

.

CIRCUIT OPERATION

• The camshaft position sensor power is supplied

from the MFI relay (terminal No. 4).

• Terminal No. 1 of the camshaft position sensor is

grounded with PCM (terminal No. 113).

• A 5-volt voltage is applied on the camshaft posi-

tion sensor output terminal (terminal No. 2) from
the PCM (terminal No. 104). The camshaft posi-
tion sensor generates a pulse signal when the
output terminal is opened and grounded.

.

TECHNICAL DESCRIPTION

• The camshaft position sensor functions to detect

the top dead center position of the number 1 cyl-
inder and to convert that data to pulse signals
that are input to the PCM.

• When the engine is running, the camshaft posi-

tion sensor outputs a pulse signal.

• The PCM checks whether pulse signal is input

while the engine is cranking.

.

DESCRIPTIONS OF MONITOR METHODS

• Camshaft position sensor signal does not

change.

• Camshaft position sensor signal is not normal

pattern.

.

MONITOR EXECUTION
Continuous

.

MONITOR EXECUTION CONDITIONS (Other
monitor and Sensor)

Other Monitor (There is no temporary DTC stored

in memory for the item monitored below)

• Not applicable

Sensor (The sensor below is determined to be

normal)

• Not applicable

.

AK303129AB

CAMSHAFT POSITION
SENSOR

B-106 (B)

CONNECTOR: B-106

1

2

3

4

1

2

3

4

1

2

3

4

1

2

3

4

AK303014

CONNECTOR: B-17X

MFI RELAY

MFI RELAY

FRONT OF VEHICLE

B-17X

AB

AK303043

CONNECTOR: B-22

B-22 (B)

PCM

AB

AIR CLEANER

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-607

DTC SET CONDITIONS <Range/Performance problem - Alignment>

Logic Flow Chart

.

DTC SET CONDITIONS

Check Conditions

• Engine speed is higher than 50 r/min.

Judgment Criteria

• Normal signal pattern has not been input for cyl-

inder identification from the crankshaft position
sensor signal and camshaft position sensor sig-
nal for 2 seconds.

.

START

END

YES

NO

NO

YES

MALFUNCTION

GOOD

CONTINUOUS

FAILURE FOR 2secs

EXPECTED STATE

OF THE SENSOR

MONITORING
CONDITIONS?

YES

NO

AK302393

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-608

DTC SET CONDITIONS <Range/Performance problem - Circuit continuity>

Logic Flow Chart

.

Check Conditions

• Engine speed is higher than 50 r/min.

Judgment Criteria

• Camshaft position sensor output voltage has not

changed (no pulse signal is input) for 2 seconds.

.

OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function

− OBD-II Drive Cycle −

Procedure 6

− Other Monitor

P.13B-5

.

.

TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are: )

• Camshaft position sensor failed.

• Open or shorted camshaft position sensor circuit,

or harness damage, or connector damage.

• PCM failed.

START

END

NO

NO

YES

YES

MALFUNCTION

GOOD

OUTPUT SIGNAL

CHANGES

CONTINUOUS

FAILURE FOR 2secs

MONITORING

CONDITIONS?

YES

NO

AK302394