Mitsubishi Eclipse. Manual — part 503
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-555
(1) Disconnect the knock sensor connector B-35.
(2) Start the engine and run at idle.
(3) Measure the voltage between knock sensor side connector
terminal No. 1 (output) and No. 2 (ground).
(4) Gradually increase the engine speed.
• The voltage increases with the increase in the engine
speed.
(5) Turn the ignition switch to the "LOCK"(OFF) position.
Q: Is the sensor operating properly?
YES : Replace the ECM or PCM. Then go to Step 6.
NO : Replace the knock sensor. Then go to Step 6.
AK300444
1
2
AB
B-35 (GR)
CONNECTOR: B-35 <WITHOUT INTAKE
MANIFOLD TUNING SYSTEM>
KNOCK SENSOR
HARNESS
CONNECTOR:
COMPONENT SIDE
AK300749
1
2
KNOCK SENSOR
CONNECTOR: B-35 <WITH INTAKE
MANIFOLD TUNING SYSTEM>
AB
B-35 (GR)
HARNESS CONNECTOR:
COMPONENT SIDE
AK103514AB
KNOCK SENSOR
SIDE CONNECTOR
1 2
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-556
STEP 6. Using scan tool MB991958, read the diagnostic
trouble code (DTC).
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK"(OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Erase the DTC.
(4) Test drive under the following conditions:
• Engine speed: 3,000 − 5,000 r/min
• Engine load: 40 % or more
• Drive a minimum of 3 seconds after the above condi-
tions have been met.
(5) After completing the test drive, read the DTC.Turn the
ignition switch to the "LOCK"(OFF) position.
Q: Is DTC P0325 set?
YES : The inspection is complete.
NO : Retry the troubleshooting.
AK300810
AB
MB991911
16-PIN
MB991827
MB991824
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-557
DTC P0335: Crankshaft Position Sensor Circuit
AK101608
1 2
3
RED
-
WHITE
RED
-
WHITE
RED
-
WHITE
RED
BROWN
GREEN-
RED
BATTERY
MFI
RELAY
CRANKSHAFT
POSITION
SENSOR
B-20
MU802603
43 <M/T>*2
45 <A/T>*4
34 <M/T>*1
16 <A/T>*3
4
1
2
3
3
1
2
5 V
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
Crankshaft Position Sensor Circuit
NOTE
*1: ECM connector C-51 <M/T>
*2: ECM connector C-58 <M/T>
*3: PCM connector C-52 <A/T>
*4: PCM connector C-55 <A/T>
C-51 <M/T>, C-52 <A/T>
(MU803784)
2
3 4
5 6
7 8
9
11 12 13 14 15 16 17 18 19 20
30
21 22 23
24 25
26 27 28 29
3132 33
34 35
1
10
3 4
1 2
A-18X
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-558
.
CIRCUIT OPERATION
• The crankshaft position sensor power is supplied
from the MFI relay (terminal No. 4).
• Terminal No. 1 of the crankshaft position sensor
is grounded with ECM (terminal No. 34) <M/T> or
PCM (terminal No. 16) <A/T>.
• A 5-volt voltage is applied on the crankshaft posi-
tion sensor output terminal (terminal No. 2) from
the ECM (terminal No. 43) <M/T> or PCM (termi-
nal No. 45) <A/T>. The crankshaft position sen-
sor 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 posi-
tion sensor outputs a pulse signal.
• The ECM <M/T> or PCM <A/T> checks whether
pulse signal is input while the engine is cranking.
.
AK300110
CRANKSHAFT
POSITION
SENSOR
CONNECTOR: B-20 <WITHOUT INTAKE
MANIFOLD TUNING SYSTEM>
AB
B-20 (B)
AK300111
CONNECTOR: B-20 <WITH INTAKE
MANIFOLD TUNING SYSTEM>
AB
B-20 (B)
CRANKSHAFT
POSITION
SENSOR
AK300244
CONNECTORS: C-52, C-55 <A/T>
AB
PCM
C-52 (GR)
C-55 (GR)
AK300091
CONNECTORS: C-51, C-58 <M/T>
ECM
AB
C-51 (GR)
C-58 (GR)
AK300121
MFI RELAY
CONNECTOR: A-18X
AB
A-18X
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