Mitsubishi Lancer Evolution IX. Manual — part 428
![](/vehicles/winoney/wruvea/ger/pli.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-187
Code No. P0500: Vehicle Speed Sensor System
AK501816
1 2 3
4 5 6
2 3
1
80
87
81
94
85
82
84
93
86
98
99
74
92
73
83
88
91
95
97
96
100
89
78
71
90
76 77
75
72
79
B-W
B-W*1
O*2
B-W
B-W
B-Y
B
B
B
B-R
B-Y
5V
B-04
(MU802723)
Vehicle speed sensor
80
R
IG2
ST
LOCK
ACC
IG1
C-211
C-124
18 (*1)
or
16 (*2)
B-27
B-27
B-27
C-214
Ignition
switch
C-208
2
6
25
1
6
7
5
3
8
Meter and gauge
Vehicle speed sensor circuit
C-117
(MU803783)
2
7.5A
Engine-ECU
Wire colour code
B: Black LG: Light green G: Green L: Blue W: White Y: Yellow SB: Sky blue BR: Brown O: Orange GR: Gray
R: Red P: Pink V: Violet PU: Purple
J/B
AB
NOTE
*1: L.H. drive vehicles
*2: R.H. drive vehicles
C-124
17 (*1)
or
25 (*2)
![](/vehicles/winoney/wruvea/ger/xxtusomay.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-188
OPERATION
• A power voltage of 5 V is applied to the vehicle
speed sensor (terminal No. 3) from the
engine-ECU (terminal No. 80).
FUNCTION
• The vehicle speed sensor converts the vehicle
speed to the voltage, and then input it into the
engine-ECU.
TROUBLE JUDGMENT
Check Conditions
• 2 seconds later after the engine has started up.
• The engine speed is 2,000 − 4,000 r/min.
• The volumetric efficiency is 60 − 80%.
Judgment Criterion
• The sensor output voltage remains unchanged
(no pulse signal is inputted) for 2 seconds.
PROBABLE CAUSES
• Failed Vehicle speed sensor
• Open/short circuit in vehicle speed sensor circuit
or loose connector contact
• Failed engine-ECU
DIAGNOSIS PROCEDURE
STEP 1. Check the speedometer
Q: Is the check result normal?
YES :
Go to Step 2 .
NO :
Check the speedometer (Refer to GROUP
54A
−Combination Meter Assembly −
).
STEP 2. M.U.T.-II/III data list
• Refer to Data List Reference Table
.
a. Item No. 24: Vehicle speed sensor
Q: Is the check result normal?
YES :
Go to Step 3 .
NO :
Intermittent malfunction (Refer to GROUP
00 - How to Use Troubleshooting/Inspection
Service Points
STEP 3. Connector check: C-117 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 4 .
NO :
Repair or replace the connector.
AK501996
80
87
81
94
85
82
84
93
86
98
99
74
92
73
83
88
91
95
97 96
100
89
78
71
90
76
77
75
72
79
AB
Connector: C-117
C-117 (GR)
C-117 (GR)
Harness side connector
<L. H. drive vehicles>
<R. H. drive vehicles>
![](/vehicles/winoney/wruvea/ger/gon.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-189
STEP 4. Check harness between C-117 (terminal
No. 80) engine-ECU connector and B-04 (terminal
No. 3) vehicle speed sensor connector.
NOTE: Before checking harness, check intermediate
connectors B-27 and C-124, and repair if necessary.
• Check output line for open circuit and damage.
Q: Is the check result normal?
YES :
Go to Step 5 .
NO :
Repair the damaged harness wire.
STEP 5. Check the trouble symptoms.
Q: Does trouble symptom persist?
YES :
Replace the engine-ECU.
NO :
Intermittent malfunction (Refer to GROUP
00
− How to Use
Troubleshooting/Inspection Service Points
).
AK501996
80
87
81
94
85
82
84
93
86
98
99
74
92
73
83
88
91
95
97 96
100
89
78
71
90
76
77
75
72
79
AB
Connector: C-117
C-117 (GR)
C-117 (GR)
Harness side connector
<L. H. drive vehicles>
<R. H. drive vehicles>
AK305027
1
2
3
AB
Transmission assembly
Connector : B-04
Harness side
connector
B-04(B)
![](/vehicles/winoney/wruvea/ger/quidano.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-190
Code No P0505: Idle Speed Control Servo System
1 2
4 5 6
3
AK501817
1
2
3
4
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
B-104
Idle speed control
servo
1
4
2
3
3
1
2
4
5
6
14
28
15
29
Idle speed control servo circuit
B-12X
C-121
(MU803784)
B-Y
R-Y
R-Y
Y-L
Y
R-G
LG
R-Y
B-Y
B-Y
Battery
6 <A-13> (*1) or
13 <C-31> (*2)
Engine control relay
Engine-ECU
Wire colour code
B: Black LG: Light green G: Green L: Blue W: White Y: Yellow SB: Sky blue BR: Brown O: Orange GR: Gray
R: Red P: Pink V: Violet PU: Purple
NOTE
*1: L.H. drive vehicles
*2: R.H. drive vehicles
AB
To engine-ECU
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