Mitsubishi Grandis. Manual — part 734
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-187
STEP 7. Connector check: C-110 engine-ECU
<M/T> connector or engine-A/T-ECU <A/T>
connector
Q: Is the check result normal?
YES :
Check and repair harness between B-01
(terminal No. 1) purge control solenoid valve
connector and C-110 (terminal No. 23)
engine-ECU <M/T> connector or
engine-A/T-ECU <A/T> connector.
• Check output line for open/short
circuit.
NO :
Repair or replace.
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.
AK305618AB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
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
AK305619
1
2
AB
Connector: B-01
B-01(B)
Harness
side connector
AK305618AB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
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-188
STEP 9. Check harness between B-01 (terminal
No. 1) purge control solenoid valve connector
and C-110 (terminal No. 23) engine-ECU <M/T>
connector or engine-A/T-ECU <A/T> connector.
• Check output line for damage.
Q: Is the check result normal?
YES :
Go to Step 10 .
NO :
Repair.
STEP 10. Check harness between B-01 (terminal
No. 2) purge control solenoid valve connector
and B-15X (terminal No. 1) engine control relay
connector.
NOTE: Before checking harness, check intermediate
connector C-116, and repair if necessary.
• Check power line for damage.
Q: Is the check result normal?
YES :
Go to Step 11 .
NO :
Repair.
STEP 11. MUT-III actuator test
• Item 08: purge control solenoid valve
OK: Operating sound can be heard and the
valve vibrates
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>.
AK305619
1
2
AB
Connector: B-01
B-01(B)
Harness
side connector
AK305618AB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
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
AK305619
1
2
AB
Connector: B-01
B-01(B)
Harness
side connector
AK300967
2
1
3
4
AC
Harness side
connector
B-15X
Connector: B-15X
Relay box’s
triangle marks
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-189
Code No. P0500: Vehicle Speed Sensor System <M/T>
OPERATION
• A power voltage of 5 V is applied to the vehicle
speed sensor (terminal No. 3) from the
engine-ECU (terminal No. 79).
AK305565
1
2
3
4
61
656667686970 717273
74757677787980 8182
8384
858687
8889
62
6364
1
2 3
1
2
3
AB
Engine-ECU
B-15X
B-107
B-107-1
(MU802723)
Vehicle speed sensor
Vehicle speed sensor circuit
C-112
(MU803804)
B-W
W-L (*1)
W-V (*2)
B-W
2
88
3
2
3
79
15
12
J/C (4)
C-116
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
W-G
Battery
W-G
Engine
control
relay
4
3
1
2
1
1
22
20
J/C (4)
C-116
R-W
R-W
To engine-ECU
NOTE
*1: L.H. drive vehicles
*2: R.H. drive vehicles
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-190
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.
• Engine speed: 2,500 r/min or more.
• Under the high load operation.
Judgment Criterion
• The sensor output voltage remains unchanged
(no pulse signal is inputted) for 2 seconds.
PROBABLE CAUSE
• 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 speed meter
Q: Is the check result normal?
YES :
Go to Step 2 .
NO :
Check the speed meter (Refer to GROUP
54A
−Combination Meter Assembly −
On-vehicle Service
− Speedmeter Check
STEP 2.MUT-III data list
• Refer to Data list reference table
.
a. Item 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.Check connector: C-112 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 4 .
NO :
Repair or replace.
AK305617
Connector: C-112
C-112 (GR)
C-112 (GR)
AB
Harness side connector
<R.H. drive vehicles>
<L.H. drive vehicles>
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