Mitsubishi Outlander (2003+). Manual — part 97
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MFI)
13A-251
OPERATION
The battery voltage is applied to the fan control
relay (terminal No. 1) from the engine control
relay (terminal No. 1) and is earthed to the vehi-
cle body from the fan control relay (terminal No.
3).
The battery voltage is applied to the fan control
relay (terminal No. 4).
When the fan control relay is in "ON" position, the
battery voltage is supplied to the fan controller
(terminal No. 3) from the fan control relay (termi-
nal No. 2).
FUNCTION
When the engine control relay is in "ON" position,
the fan control relay is also simultaneously
placed in "ON" position. Accordingly, the battery
voltage is supplied to the fan controller.
PROBABLE CAUSE
Failed fan control relay
Failed fan controller
Failed radiator fan motor
Failed condenser fan motor
Open/short circuit in fan control relay circuit or
loose connector contact
Failed engine-ECU
DIAGNOSIS PROCEDURE
STEP 1. Connector check: A-10X fan control
relay connector
Q: Is the check result normal?
YES :
Go to Step 2 .
NO :
Repair.
STEP 2. Check fan control relay.
Check fan control relay (Refer to GROUP 14
-
On
-
vehicle Service
Q: Is the check result normal?
YES :
Go to Step 3 .
NO :
Replace fan control relay.
STEP 3. Measure resistance at A-10X fan control
relay connector.
Remove relay and measure at relay box side.
Resistance between terminal No. 3 and earth.
OK: 2
W
or less
Q: Is the check result normal?
YES :
Go to Step 4 .
NO :
Check and repair harness between A-10X
(terminal No. 3) fan control relay connector
and body earth.
Check earthing line for open circuit
and damage.
STEP 4. Measure voltage at A-10X fan control
relay connector.
Remove relay and measure at relay box side.
Ignition switch: ON
Voltage between terminal No. 1 and earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 6 .
NO :
Go to Step 5 .
AK300324
3
1
2
4
AB
CONNECTOR: A-10X
A-10X
Harness side
connector
AK300324
3
1
2
4
AB
CONNECTOR: A-10X
A-10X
Harness side
connector
AK300324
3
1
2
4
AB
CONNECTOR: A-10X
A-10X
Harness side
connector
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MFI)
13A-252
STEP 5. Connector check: B-17X engine control
relay connector
Q: Is the check result normal?
YES :
Check intermediate connectors A-14 and C-
17, and repair if necessary. If intermediate
connectors are normal, check and repair
harness between B-17X (terminal No. 1)
engine control relay connector and A-10X
(terminal No. 1) fan control relay connector.
Check power supply line for
open/short circuit.
NO :
Repair.
STEP 6. Measure voltage at A-10X fan control
relay connector.
Remove relay, and measure at relay box side.
Voltage between terminal No. 4 and earth
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 7 .
NO :
Check and repair harness between battery
and A-10X (terminal No. 4) fan control relay
connector.
Check power supply line for
open/short circuit.
STEP 7. Connector check: A-20 fan controller
connector
Q: Is the check result normal?
YES :
Go to Step 8 .
NO :
Repair.
AK300255
2
1
3
4
Relay box’s
triangle marks
AB
CONNECTOR: B-17X
B-17X
Harness side
connector
AK300324
3
1
2
4
AB
CONNECTOR: A-10X
A-10X
Harness side
connector
AK300324
3
1
2
4
AB
CONNECTOR: A-10X
A-10X
Harness side
connector
AK203423
1
2
3
Harness side
connector
A-20 (GR)
AC
Connector: A-20
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MFI)
13A-253
STEP 8. Measure voltage at A-20 fan controller
connector.
Disconnect connector, and measure at harness
side.
Ignition switch: ON
Voltage between terminal No. 3 and earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 12 .
NO :
Go to Step 9 .
STEP 9. Check harness between A-10X (terminal
No. 2) fan control relay connector and A-20
(terminal No. 3) fan controller connector.
Check output line for open/short circuit.
Q: Is the check result normal?
YES :
Go to Step 10 .
NO :
Repair.
STEP 10. Connector check: B-17X engine control
relay connector
Q: Is the check result normal?
YES :
Go to Step 11 .
NO :
Repair.
STEP 11. Check harness between B-17X
(terminal No. 1) engine control relay connector
and A-10X (terminal No. 1) fan control relay
connector.
NOTE: Before checking harness, check intermediate
connectors A-14 and C-17, and repair if necessary.
Check power supply line for damage.
Q: Is the check result normal?
YES :
Check and repair harness between A-10X
(terminal No. 3) fan control relay connector
and body earth.
Check earthing line for damage.
NO :
Repair.
AK203423
1
2
3
Harness side
connector
A-20 (GR)
AC
Connector: A-20
AK300324
3
1
2
4
AB
CONNECTOR: A-10X
A-10X
Harness side
connector
AK203423
1
2
3
Harness side
connector
A-20 (GR)
AC
Connector: A-20
AK300255
2
1
3
4
Relay box’s
triangle marks
AB
CONNECTOR: B-17X
B-17X
Harness side
connector
AK300255
2
1
3
4
Relay box’s
triangle marks
AB
CONNECTOR: B-17X
B-17X
Harness side
connector
AK300324
3
1
2
4
AB
CONNECTOR: A-10X
A-10X
Harness side
connector
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MFI)
13A-254
STEP 12. Connector check: C-134 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 13 .
NO :
Repair.
STEP 13. Fan motor drive test.
Disconnect C-134 engine-ECU connector.
Ignition switch: ON
OK: Fan motor rotates.
Q: Is the check result normal?
YES :
Go to Step 14 .
NO :
Go to Step 15 .
STEP 14. MUT-II actuator test
Item 21: Fan controller
OK: Fan motor rotates.
Q: Is the check result normal?
YES :
Intermittent malfunction (Refer to GROUP
00
-
How to Use
Troubleshooting/Inspection Service Points
).
NO :
Replace engine-ECU.
STEP 15. Measure voltage at C-134 engine-ECU
connector.
Disconnect connector, and measure at harness
side.
Ignition switch: ON
Voltage between terminal No. 21 and earth.
OK: 4.9
-
5.1 V
Q: Is the check result normal?
YES :
Go to Step 16 .
NO :
Go to Step 18 .
AK300257
1
14
4
19
5
22
6
17
8
15
9
18
7
20
16
2
13 12
23
24
25
26
21
3
10
11
AB
CONNECTOR: C-134
C-134
Harness side connector
AK300257
1
14
4
19
5
22
6
17
8
15
9
18
7
20
16
2
13 12
23
24
25
26
21
3
10
11
AB
CONNECTOR: C-134
C-134
Harness side connector
AK300257
1
14
4
19
5
22
6
17
8
15
9
18
7
20
16
2
13 12
23
24
25
26
21
3
10
11
AB
CONNECTOR: C-134
C-134
Harness side connector
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