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Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual - part 123

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-191

DTC P0340: Camshaft Position Sensor Circuit Malfunction

AK000664

3 4

1 2

RED

WHITE

RED

WHITE

RED

WHITE

RED

ACK

UE-

YELL

BATTERY

MFI RELAY

A-21X

CAMSHAFT
POSITION
SENSOR

B-09
MU802337

C-54<A/T>
(MU803781)

C-60<M/T>
(MU803772)

88<M/T>
56<A/T>

ENGINE CONTROL
MODULE(ECM)<M/T>
OR
POWERTRAIN CONTROL
MODULE(PCM)<A/T>

42 43
48 49 50 51 52 53 54 55 56 57

58 59

60 61 62 63

64 65 66

89 90 91 92

83 84

JOINT
GROUND
POINT

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-192

CIRCUIT OPERATION

•

The camshaft position sensor power is supplied
from the MFI relay (terminal 1). Ground is
provided through terminal 1 to chassis ground.

•

A 5-volt voltage is applied on the camshaft
position sensor output terminal (terminal 2) from
the ECM (terminal 88) <M/T> or PCM (terminal
56) <A/T>. The camshaft position 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
cylinder and to convert that data to pulse signals
that are input to the ECM <M/T> or PCM <A/T>.

•

When the engine is running, the camshaft
position sensor outputs a pulse signal.

•

The ECM <M/T> or PCM <A/T> checks whether
pulse signal is input while the engine is cranking.

DTC SET CONDITIONS

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.

Check Conditions

•

Engine speed is higher than 50 r/min.

Judgment Criteria

•

Normal signal pattern has not been input for
cylinder identification from the crankshaft position
sensor signal and camshaft position sensor
signal for 2 seconds.

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 loose connector.

•

ECM failed. <M/T>

•

PCM failed. <A/T>

AK000276AB

AK000276

CONNECTOR : B-09

AK000280

C-54

C-60

ECM<M/T>
OR
PCM<A/T>

CONNECTORS:C-60<M/T>,C-54<A/T>

AK000226

AK000226AB

CONNECTOR : A-21X

MFI RELAY

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-193

DIAGNOSIS

STEP 1. Using the oscilloscope, check the camshaft
position sensor.
(1) Disconnect the camshaft position sensor connector B-09,

and connect test harness special tool (MB991348) in
between. (All terminals should be connected.)

(2) Connect the oscilloscope probe to the camshaft position

sensor side connector terminal 2.

NOTE: When measuring with the ECM or PCM side
connector, connect an oscilloscope probe to terminal 88
<M/T> or terminal 56 <A/T>.

(3) Start the engine and run at idle.
(4) Check the waveform.

•

The waveform should show a pattern similar to the
illustration.

(5) Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the waveform normal?

YES : Go to Step 2.
NO : Go to Step 4.

STEP 2. Check connector B-09 at camshaft position
sensor for damage.
Q: Is the connector in good condition?

YES : Go to Step 3.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection (

P.00E-2

). Then go to Step 18.

STEP 3. Check the trouble symptoms.
(1) Carry out a test drive with the drive cycle pattern. Refer to,

Procedure 6

−

Other Monitor (

P.13A-5

(2) Check the diagnostic trouble code (DTC).

Q: Is the DTC P0340 is output?

YES : Replace the ECM or PCM. Then go to Step 18.
NO : It can be assumed that this malfunction is intermittent.

Refer to GROUP 00, How to Use Troubleshooting/
Inspection Service Points (

P.00-6

AKX01419 AB

CAMSHAFT POSITION
SENSOR CONNECTOR

1 2 3

OSCILLOSCOPE

OSCILLO-
SCOPE
PROBE

AKX01420AB

2 ENGINE REVOLUTIONS

NORMAL WAVEFORM

AK000276AB

AK000276

CONNECTOR : B-09

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-194

STEP 4. Check connector B-09 at camshaft position
sensor for damage.
Q: Is the connector in good condition?

YES : Go to Step 5.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection (

P.00E-2

). Then go to Step 18.

STEP 5. Check the sensor supply voltage at camshaft
position sensor connector B-09.
(1) Disconnect the connector B-09 and measure at the harness

side.

(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 2 and ground.

•

Voltage should be between 4.8 and 5.2 volts

(4) Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the voltage normal?

YES : Go to Step 10.
NO : Go to Step 6.

STEP 6. Check the sensor supply voltage at ECM
connector C-60 <M/T> or PCM connector C-54 <A/T> by
backprobing
(1) Do not disconnect the ECM connector C-60 <M/T> or PCM

connector C-54 <A/T>.

(2) Disconnect the camshaft position sensor connector B-09.
(3) Turn the ignition switch to the "ON" position.
(4) Measure the voltage between terminal 88 <M/T> or 56 <A/

T> and ground by backprobing.

•

Voltage should be between 4.8 and 5.2 volts.

(5) Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the voltage normal?

YES : Go to Step 7.
NO : Go to Step 8.

AK000276AB

AK000276

CONNECTOR : B-09

AKX01421AC

B-09 HARNESS
SIDE CONNECTOR

3 2 1

AK000317

7172 73 74 75 76 77 78 79 80 81

82 83 84 85 86 87 88 89 90

<M/T>

C-60 CONNECTOR
HARNESS SIDE VIEW

AK000318

C-54 CONNECTOR
HARNESS SIDE VIEW

46
57
66

45
56

44
55

43
49

42
48
59

41
47
58

53
63

52
62

51
61

50
60

<A/T>

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