Mitsubishi Grandis. Manual — part 770
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-331
STEP 5. Connector check: C-307 ignition switch
connector
Q: Is the check result normal?
YES :
Check intermediate connector C-202, and
repair if necessary. If intermediate
connector is normal, check and repair
harness between C-216 (terminal No. 3)
fuel pump relay (1) connector and C-307
(terminal No. 2) ignition switch connector.
• Check power supply line for open
circuit and damage.
NO :
Repair or replace.
STEP 6. Perform voltage measurement at C-216
fuel pump relay (1) connector.
• Remove relay, and measure at junction block
side.
• Voltage between terminal No. 4 and earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 7 .
NO :
Check intermediate connectors C-125 and
C-203, and repair if necessary. If
intermediate connectors are normal, check
and repair harness between C-216 (terminal
No. 4) fuel pump relay (1) connector and
battery.
• Check power supply line for
open/short circuit.
1
2
3
4
5
6
AK305629
C-307
C-307
Connector: C-307
Harness side connector
<R.H.drive vehicle>
<L.H.drive vehicle>
AB
AK305635
2 1
3
4
AB
Connector: C-216
C-216
Harness side
connector
C-216
Relay box’s
triangle marks
<L.H. drive vehicles>
<R.H. drive vehicles>
AK305635
2 1
3
4
AB
Connector: C-216
C-216
Harness side
connector
C-216
Relay box’s
triangle marks
<L.H. drive vehicles>
<R.H. drive vehicles>
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-332
STEP 7. Perform voltage measurement at C-214
fuel pump relay (2) connector.
• Remove relay, and measure at junction block
side.
• Ignition switch: ON
• Voltage between terminal No. 3 and earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 9 .
NO :
Go to Step 8 .
STEP 8. Connector check: C-307 ignition switch
connector
Q: Is the check result normal?
AK305634
2 1
3
4
AB
Connector: C-214
C-214
Harness side
connector
C-214
Relay box’s
triangle marks
<L.H. drive vehicles>
<R.H. drive vehicles>
1
2
3
4
5
6
AK305629
C-307
C-307
Connector: C-307
Harness side connector
<R.H.drive vehicle>
<L.H.drive vehicle>
AB
AK305634
2 1
3
4
AB
Connector: C-214
C-214
Harness side
connector
C-214
Relay box’s
triangle marks
<L.H. drive vehicles>
<R.H. drive vehicles>
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-333
YES :
Check intermediate connector C-202, and
repair if necessary. If intermediate
connector is normal, check and repair
harness between C-307 (terminal No. 2)
ignition switch connector and C-214
(terminal No. 3) fuel pump relay (2)
connector.
• Check power supply line for open
circuit.
NO :
Repair or replace.
STEP 9. 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 10 .
NO :
Repair or replace.
STEP 10. Perform voltage measurement at C-110
engine-ECU <M/T> connector or engine-A/T-ECU
<A/T> connector.
• Disconnect connector, and measure at harness
side.
• Ignition switch: ON
• Voltage between terminal No. 16 and earth.
OK: System voltage
Q: Is the check result normal?
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
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
AK305634
2 1
3
4
AB
Connector: C-214
C-214
Harness side
connector
C-214
Relay box’s
triangle marks
<L.H. drive vehicles>
<R.H. drive vehicles>
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-334
YES :
Go to Step 11 .
NO :
Check intermediate connectors C-18 and
C-205, and repair if necessary. If
intermediate connectors are normal, check
and repair harness between C-214 (terminal
No. 2) fuel pump relay (2) connector and
C-110 (terminal No. 16) engine-ECU <M/T>
connector or engine-A/T-ECU <A/T>
connector.
• Check earthing line for open/short
circuit.
STEP 11. Connector check: D-15 fuel pump
connector
Q: Is the check result normal?
YES :
Go to Step 12 .
NO :
Repair or replace.
STEP 12. Perform voltage measurement at D-15
fuel pump connector.
• Disconnect connector, and measure at harness
side.
• Ignition switch: ON
• Using a jumper wire, connect C-110 (terminal No.
16) engine-ECU <M/T> connector or
engine-A/T-ECU <A/T> connector and earth.
• Voltage between terminal No. 5 and earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 15 .
NO :
Go to Step 13 .
STEP 13. Check harness between C-216 (terminal
No. 1) fuel pump relay (1) connector and C-214
(terminal No. 1) fuel pump relay (2) connector.
• Check power supply line for open/short circuit.
Q: Is the check result normal?
YES :
Go to Step 14
NO :
Repair.
AK301003
1
2
3
4
5
AC
Connector: D-15
D-15 (GR)
Harness side
connector
AK301003
1
2
3
4
5
AC
Connector: D-15
D-15 (GR)
Harness side
connector
AK305633
2 1
3
4
AB
Connectors: C-214, C-216
C-214
Harness side
connector
C-216
C-214
Relay box’s
triangle marks
C-216
<L.H. drive vehicles>
<R.H. drive vehicles>
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