Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 120

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-179

STEP 4. Check for open circuit, short circuit to ground and
harness damage between knock sensor connector B-35
terminal 1 and ECM connector C-60 terminal 78 <M/T> or
PCM connector C-57 terminal 90 <A/T>.
Q: Is the harness wire in good condition?

YES : Go to Step 5.
NO : Repair it. Then go to Step 6.

STEP 5. Replace the knock sensor.
(1) Replace the knock sensor.
(2) Carry out a test drive.
(3) Check the diagnostic trouble code (DTC).

Q: Is the DTC P0325 is output?

YES : Replace the ECM or PCM. Then go to Step 6.
NO : The inspection is complete.

ACX02470

KNOCK SENSOR

CONNECTOR:B-35

AE

AK000280

C-60

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

CONNECTORS:C-60<M/T>,C-57<A/T>

BE

C-57

ACX02470

KNOCK SENSOR

CONNECTOR:B-35

AE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-180

STEP 6. Using scan tool MB991502, check data list item 44:
Ignition Coils and Ignition Power Transistor.

CAUTION

To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991502 to the data reading mode for item

44, Ignition Coils and Ignition Power Transistor.

•

Ignition timing with the knock sensor connector
disconnected should retard more than the ignition timing
with the knock sensor connector connected.

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

Q: Is the ignition timing changes normally?

YES : The inspection is complete.
NO : Retry the troubleshooting.

AKX01177

16 PIN

MB991502

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-181

DTC P0335: Crankshaft Position Sensor Circuit Malfunction

AK000663

1 2

3

2

3 4

1

RED

-

WHITE

RED

-

WHITE

RED

-

WHITE

RED

BL

ACK

GREEN-

RED

BATTERY

A-21X

MFI
RELAY

CRANKSHAFT
POSITION
SENSOR

B-20
MU802603

C-54<A/T>
(MU803781)

C-60<M/T>
(MU803772)

89<M/T>
45<A/T>

1

1

2

2

3

3

4

5V

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

46

45

44

58 59

60 61 62 63

64 65 66

47

41

82

78

81

80

89 90 91 92

79

87

71

74

73

72

76

75

77

85

88

83 84

86

AK000546AB

CONNECTOR:C-20

AK000280

C-54

C-60

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

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

BB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-182

CIRCUIT OPERATION

•

The crankshaft position sensor power is supplied
from the MFI relay (terminal 1), and the ground is
provided on the vehicle body.

•

A 5-volt voltage is applied on the crankshaft
position sensor output terminal (terminal 2) from
the ECM (terminal 89) <M/T> or PCM (terminal
45) <A/T>. The crankshaft position sensor
generates a pulse signal when the output
terminal is opened and grounded.

TECHNICAL DESCRIPTION

•

The crankshaft position sensor detects the crank
angle (position) of each cylinder, and converts
that data to pulse signals, which are then input to
the ECM <M/T> or PCM <A/T>.

•

When the engine is running, the crankshaft
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 is being cranked.

Judgment Criteria

•

Crankshaft position sensor output voltage has not
changed (no pulse signal is input) for 2 seconds.

Check Conditions, 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:)

•

Crankshaft position sensor failed.

•

Open or shorted crankshaft position sensor
circuit, or loose connector.

•

ECM failed. <M/T>

•

PCM failed. <A/T>

DIAGNOSIS

Required Special Tools
MB991502: Scan Tool (MUT-II)

AK000226

AK000226AB

CONNECTOR : A-21X

MFI RELAY