Mitsubishi Grandis. Manual — part 761
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-295
STEP 9: Check inhibitor switch.
• Check ignition switch (Refer to GROUP 23A − On
− vehicle Service − A/T Control Component
Check
− Inhibitor Switch Check
).
Q: Is the check result normal?
YES :
Check intermediate connectors B-17, and
repair if necessary. If intermediate
connector are normal, check and repair
harness between B-111 (terminal No. 9)
inhibitor switch connector and C-111
(terminal No. 51) engine-A/T-ECU
connector.
• Check power supply line for
open/short circuit.
NO :
Replace ignition switch.
STEP 10: Connector check: B-111 inhibitor
switch connector and B-116 starter connector
Q: Is the check result normal?
YES :
Check intermediate connectors B-17, and
repair if necessary. If intermediate
connectors are normal, check and repair
harness between B-111 (terminal No. 9)
inhibitor switch connector and B-116
(terminal No. 1) starter connector.
• Check output line for short circuit.
NO :
Repair or replace.
STEP 11: Connector check: B-116 starter
connector
Q: Is the check result normal?
YES :
Go to Step 12.
NO :
Repair or replace.
AK305632
8
9
3
4
5
1
2
6
7
10
B-111 (B)
Connector: B-111
Harness side connector
AB
AK305625AB
Connector: C-111
<L.H. drive vehicles>
<R.H. drive vehicles>
C-111 (GR)
C-111 (GR)
Harness side connector
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
52
53
54
55
56
57
58
50
51
AK305632
8
9
3
4
5
1
2
6
7
10
B-111 (B)
Connector: B-111
Harness side connector
AB
AK305631
1
B-116 (B)
Connector: B-116
Harness side connector
AB
AK305631
1
B-116 (B)
Connector: B-116
Harness side connector
AB
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-296
STEP 12: Perform voltage measurement at B-116
starter connector.
• Disconnect connector, and measure at the
harness side.
• Ignition switch: ST
• Voltage between terminal No. 1 and earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 14.
NO :
Go to Step 13.
STEP 13: Connector check: B-111 inhibitor
switch connector
Q: Is the check result normal?
YES :
Check intermediate connectors B-17, and
repair if necessary. If intermediate
connectors are normal, check and repair
harness between B-111 (terminal No. 9)
inhibitor switch connector and B-116
(terminal No. 1) starter connector.
• Check output line for open circuit and
damage.
NO :
Repair or replace.
STEP 14: Connector check: B-115 starter
connector
Q: Is the check result normal?
YES :
Go to Step 15 .
NO :
Repair or replace.
STEP 15: Perform voltage measurement at B-115
starter connector.
• Disconnect connector, and measure at the
harness side.
• Voltage between terminal No. 1 and earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 16.
NO :
Check and repair harness between B-115
(terminal No. 1) starter connector and
battery.
• Check power supply line for
open/short circuit.
AK305631
1
B-116 (B)
Connector: B-116
Harness side connector
AB
AK305632
8
9
3
4
5
1
2
6
7
10
B-111 (B)
Connector: B-111
Harness side connector
AB
AK305631
1
B-116 (B)
Connector: B-116
Harness side connector
AB
AK305630
1
B-115
Connector: B-115
Harness side connector
AB
AK305630
1
B-115
Connector: B-115
Harness side connector
AB
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-297
STEP 16: Check harness between B-111 (terminal
No. 9) inhibitor switch connector and B-116
(terminal No. 1) starter connector.
NOTE: Before checking harness, check intermediate
connectors B-17 and repair if necessary.
• Check output line for damage.
Q: Is the check result normal?
YES :
Go to Step 17.
NO :
Repair.
STEP 17: Check harness between B-115 (terminal
No. 1) starter connector and battery.
• Check power supply line for damage.
Q: Is the check result normal?
YES :
Replace starter.
NO :
Repair.
Inspection Procedure 6: Starting Impossible (Starter Operative but No Initial Combustion)
COMMENT ON TROUBLE SYMPTOM
• Failure is possibly caused by failed ignition
circuit, failed fuel feed or other faults.
PROBABLE CAUSE
• Failed battery
• Timing belt broken
• Failed idle speed control
• Throttle valve fouled around
• Failed ignition system
• Failed fuel system
• Failed immobilizer system
• Failed inhibitor-switch <A/T>
• Failed engine-ECU <M/T>
• Failed engine-A/T-ECU <A/T>
DIAGNOSIS PROCEDURE
STEP 1: Check battery voltage.
• Measure battery voltage at cranking.
OK: 8 V or higher
Q: Is the check result normal?
YES :
Go to Step 2 .
NO :
Check battery (Refer to GROUP 54
−
Battery
− On-vehicle Service − Battery Test
).
STEP 2: With MUT-III of communication.
• Confirm the communication available MUT -III
and ngine-ECU <M/T> or engine-A/T-ECU <A/T>
Q: Is the check result normal?
AK305632
8
9
3
4
5
1
2
6
7
10
B-111 (B)
Connector: B-111
Harness side connector
AB
AK305631
1
B-116 (B)
Connector: B-116
Harness side connector
AB
AK305630
1
B-115
Connector: B-115
Harness side connector
AB
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-298
YES :
Go to Step 3 .
NO :
Check engine-ECU <M/T> or
engine-A/T-ECU <A/T> power supply,
engine control relay and ignition switch IG1
system (Refer to Inspection Procedure 22
STEP 3: MUT-III diagnosis code
Q: Diagnosis code set?
YES :
Inspection chart for diagnosis codes (Refer
to
NO :
Go to Step 4 .
STEP 4: MUT-III actuator test
• Item 07: Fuel pump
OK: Operating sound of fuel pump can be
heard.
Q: Is the check result normal?
YES :
Go to Step 5 .
NO :
Check fuel pump system (Refer to
Inspection Procedure 23
STEP 5. Check timing belt for breakage.
• Engine: Cranking
OK: Camshaft rotates.
Q: Is the check result normal?
YES :
Go to Step 6 .
NO :
Replace timing belt.
STEP 6. Check throttle body (throttle valve)
contamination.
Q: Is the check result normal?
YES :
Go to Step 7 .
NO :
Clean throttle body (throttle valve portion)
(Refer to
STEP 7: MUT-III data list
• Item 18: Cranking signal
OK:
ON (Ignition switch: ST)
OFF (Ignition switch: ON)
Q: Is the check result normal?
YES :
Go to Step 10 .
NO :
Go to Step 8 <M/T>, Go to Step 9 <A/T> .
STEP 8: Connector check: C-111 engine-ECU
connector
Q: Is the check result normal?
AK305625AB
Connector: C-111
<L.H. drive vehicles>
<R.H. drive vehicles>
C-111 (GR)
C-111 (GR)
Harness side connector
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
52
53
54
55
56
57
58
50
51
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
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