Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 262

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-247

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

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-248

DTC P0335: Crankshaft Position Sensor Circuit Malfunction

AK000701

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

43<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>

65

43
50

42
49

41
48
60 61

64

46 47
58 59
67 68

45

56
66

52

51

44

53

62

54

63

57

55

C-58<M/T>
(MU803782)

C-55<A/T>
(MU803781)

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

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-249

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 43) <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)

AK000216AB

AK000216

CONNECTOR : B-20

AK000226

AK000226AB

CONNECTOR : A-21X

MFI RELAY

AK000225

CONNECTOR : C-58<M/T>, C-55<A/T>

C-55

C-58

PCM<A/T>

ECM<M/T>

AI

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-250

STEP 1. Using scan tool MB991502, check data list item 22:
Crankshaft Position Sensor.

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) Start the engine and run at idle.
(3) Set scan tool MB991502 to the data reading mode for item

22, Crankshaft Position Sensor.

•

The tachometer and engine speed indicated on the scan
tool should much.

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

Q: Is the sensor operating properly?

YES : It can be assumed that this malfunction is intermittent.

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

P.00-6

).

NO : Go to Step 2.

STEP 2. Using the oscilloscope, check the crankshaft
position sensor.
(1) Do not disconnect the crankshaft position sensor connector

B-20.

(2) Connect the oscilloscope probe to terminal 2 of the

crankshaft position sensor by backprobing.

NOTE: Connect the oscilloscope probe to terminal 43 <M/
T> or terminal 45 <A/T> by backprobing when measuring
with the ECM or PCM connector.

(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 3.
NO : Go to Step 5.

AKX01177

16 PIN

MB991502

AB

AKX01500

CRANKSHAFT POSITION
SENSOR CONNECTOR

OSCILLOSCOPE

1 2

3

AB

OSCILLO-
SCOPE
PROBE

AKX01559AB

NORMAL WAVEFORM

2 ENGINE REVOLUTIONS

5V