Mitsubishi Eclipse. Manual — part 227
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-401
DTC P0325: Knock Sensor Circuit
AK000662
2
1
WHITE
BL
ACK
BL
ACK
BL
ACK
C-60 <M/T>
(MU803772)
78 <M/T>
90 <A/T>
KNOCK SENSOR
2
1
B-35
MU802661
82
78
81
80
89 90 91 92
79
87
71
74
73
72
76
75
77
85
88
83 84
86
98
78
71
88 89
76 77
72
79
91
73
80
74
75
81
92
8283
93
8485
94
8687
9596
90
97
C-57 <A/T>
(MU803782)
ENGINE CONTROL
MODULE (ECM) <M/T>
OR
POWERTRAIN CONTROL
MODULE (PCM) <A/T>
Knock Sensor Circuit
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-402
.
CIRCUIT OPERATION
• The knock sensor sends a signal voltage to the
ECM (terminal No. 78) <M/T> or PCM (terminal
No. 90) <A/T>.
.
TECHNICAL DESCRIPTION
• The knock sensor converts the vibration of the
cylinder block into a voltage and outputs it. If
there is a malfunction of the knock sensor, the
voltage output will not change.
• The ECM <M/T> or PCM <A/T> checks whether
the voltage output changes.
.
DTC SET CONDITIONS
Check Conditions
• 2 seconds or more have passed since the start-
ing sequence was completed.
• Engine speed is higher than 2,500 r/min.
Judgment Criteria
• Knock sensor output voltage (knock sensor peak
voltage in each 1/2 turn of the crankshaft) has not
changed more than 0.06 volt in the last consecu-
tive 200 periods.
.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are: )
• Knock sensor failed.
• Open or shorted knock sensor circuit, harness
damage or connector damage.
• ECM <M/T> failed.
• PCM <A/T> failed.
DIAGNOSIS
Required Special Tools:
• MB991958 (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991911: Main Harness B
AK300049
CONNECTOR: B-35
AB
B-35 (GR)
KNOCK SENSOR
AK300060
ECM
CONNECTOR: C-60 <M/T>
AE
C-60 (G)
AK300060
PCM
CONNECTOR: C-57 <A/T>
AG
C-57 (GR)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-403
STEP 1. Check connector B-35 at the knock sensor for
damage.
Q: Is the connector in good condition?
YES : Go to Step 2.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 6.
AK300401
1
2
CONNECTOR: B-35
AB
B-35 (GR)
KNOCK SENSOR
HARNESS
CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-404
STEP 2. Check the continuity at knock sensor harness
side connector B-35.
(1) Disconnect the connector B-35 and measure at the harness
side.
(2) Check for the continuity between terminal No. 2 and
ground.
• Should be less than 2 ohms.
Q: Is the continuity normal?
YES : Go to Step 3.
NO : Repair harness wire between knock sensor connector
B-35 (terminal No. 2) and ground because of open
circuit or harness damage. Then go to Step 6.
AK300401
1
2
CONNECTOR: B-35
AB
B-35 (GR)
KNOCK SENSOR
HARNESS
CONNECTOR:
COMPONENT SIDE
AKX01415
2 1
AQ
B-35 HARNESS
CONNECTOR:
COMPONENT SIDE
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