Mitsubishi Grandis. Manual — part 719
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-127
STEP 5. Connector check: B-15X engine control
relay connector
Q: Is the check result normal?
YES :
Check intermediate connector C-116, and
repair if necessary. If intermediate
connector is normal, check and repair
harness between B-15X (terminal No. 1)
engine control relay connector and B-104
(terminal No. 1) No. 3 injector connector.
• Check power supply line for
open/short circuit.
NO :
Repair or replace.
STEP 6. Connector check: B-15X engine control
relay connector
Q: Is the check result normal?
YES :
Go to Step 7 .
NO :
Repair or replace.
STEP 7. Check harness between B-15X (terminal
No. 1) engine control relay connector and B-104
(terminal No. 1) No. 3 injector connector.
NOTE: Before checking harness, check intermediate
connector C-116, and repair if necessary.
• Check power supply line for damage.
Q: Is the check result normal?
YES :
Go to Step 8 .
NO :
Repair.
AK300967
2
1
3
4
AC
Harness side
connector
B-15X
Connector: B-15X
Relay box’s
triangle marks
AK300978
M
1
2
Connector: B-104
B-104 (GR)
AK300978AL
Harness side connector
AK300967
2
1
3
4
AC
Harness side
connector
B-15X
Connector: B-15X
Relay box’s
triangle marks
AK300967
2
1
3
4
AC
Harness side
connector
B-15X
Connector: B-15X
Relay box’s
triangle marks
AK300978
M
1
2
Connector: B-104
B-104 (GR)
AK300978AL
Harness side connector
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-128
STEP 8. Connector check: C-110 engine-ECU
<M/T> connector or engine-A/T-ECU <A/T>
connector
Q: Is the check result normal?
YES :
Go to Step 9 .
NO :
Repair or replace.
STEP 9. Check harness between B-104 (terminal
No. 2) No. 3 injector connector and C-110
(terminal No. 14) engine-ECU <M/T> connector or
engine-A/T-ECU <A/T> connector.
• Check output line for open/short circuit and
damage.
Q: Is the check result normal?
YES :
Go to Step 10 .
NO :
Repair.
AK305618AB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
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19
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21
22
23
24
25
26
27
Connector: C-110
<L.H. drive vehicles>
<R.H. drive vehicles>
C-110 (GR)
C-110 (GR)
Harness side connector
AK300978
M
1
2
Connector: B-104
B-104 (GR)
AK300978AL
Harness side connector
AK305618AB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
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21
22
23
24
25
26
27
Connector: C-110
<L.H. drive vehicles>
<R.H. drive vehicles>
C-110 (GR)
C-110 (GR)
Harness side connector
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-129
STEP 10. Perform signal wave pattern
measurement at C-110 engine-ECU <M/T>
connector or engine-A/T-ECU <A/T> connector
(Using on oscilloscope).
• Engine: Idling
• Transmission: Neutral <M/T> or P range <A/T>
• Voltage between terminal No. 14 and earth.
OK: Waveform should be display on
Inspection procedure using an oscilloscope
(Refer to
Q: Is the check result normal?
YES :
Intermittent malfunction (Refer to GROUP
00
− How to Use
Troubleshooting/Inspection Service Points
).
NO :
Replace engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
AK305618AB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
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21
22
23
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25
26
27
Connector: C-110
<L.H. drive vehicles>
<R.H. drive vehicles>
C-110 (GR)
C-110 (GR)
Harness side connector
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-130
Code No. P0204: No. 4 Injector System
AK305559
2
1
2
1
2
1
2
1
1
2
3
4
1
2
3
5
6 7 8 9
4
20
21 22
232425
2627
10111213
14 15
16 1718
19
AB
B-15X
Engine
control
relay
Injector
No. 1
Injector
No. 2
J/C (4)
C-116
J/C (4)
C-116
Injector
No. 3
Injector
No. 4
B-105
(MU802062)
B-104
(MU802062)
B-102
(MU802062)
B-101
(MU802062)
1
1
1
1
17
18
19
1
9
11
22
2
2
2
2
2
Engine-ECU <M/T> or
engine-A/T-ECU <A/T>
1
5
14
21
C-110
(MU803802)
Injector circuit
W-G
W-G
R-W
R-W
R-W
R-W
R-W
R-W
R-W
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
Y
Y-L
Y-G
G-B
Battery
4
3
To engine-ECU <M/T> or
engine-A/T-ECU <A/T>
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