Mitsubishi Montero Sport (2004+). Manual — part 214
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-269
STEP 3. Measure the power supply voltage at right bank
heated oxygen sensor (rear) harness side connector E-47.
(1) Disconnect the connector E-47 and measure at the harness
side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal No. 1 and ground.
• Voltage should be battery positive voltage.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is battery positive voltage (approximately 12 volts)
present?
YES : Go to Step 5.
NO : Go to Step 4.
STEP 4. Check harness connector C-59 at the MFI relay for
damage.
Q: Is the connector in good condition?
YES : Check connector C-14, C-79 and E-45 at
intermediate connector for damage, and repair or
replace as required. Refer to GROUP 00E, Harness
Connector Inspection
. If intermediate
connector is in good condition, repair harness wire
between MFI relay connector C-59 (terminal No. 1)
and right bank heated oxygen sensor (rear) connector
E-47 (terminal No. 1) because of open circuit or short
circuit to ground. Then go to Step 12.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 12.
AK200492
1
2
3
4
E-47(GR)
AB
CONNECTOR: E-47
HARNESS
CONNECTOR:
COMPONENT SIDE
RIGHT BANK
HEATED OXYGEN
SENSOR (REAR)
AKX01496
2
1
4
3
E-47 HARNESS
CONNECTOR:
COMPONENT SIDE
AU
AK200023
2 1
3
4
CONNECTOR: C-59
AB
C-59
HARNESS
CONNECTOR:
COMPONENT
SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-270
STEP 5. Measure the power supply voltage at PCM
connector C-89 by backprobing.
(1) Do not disconnect the connector C-89.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal No. 27 and ground
by backprobing.
• Voltage should be battery positive voltage.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is battery positive voltage (approximately 12 volts)
present?
YES : Go to Step 8.
NO : Go to Step 6.
STEP 6. Check connector C-89 at PCM for damage.
Q: Is the connector in good condition?
YES : Go to Step 7.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 12.
AK103914
2
3
4
5
6
7
8
9
11
12
13
14
15
16
17
18
19
20
30
21
22
23
24
25
26
27
28
29
31
32
33
34
35
1
10
AB
CONNECTOR: C-89
C-89(GR)
HARNESS CONNECTOR:
COMPONENT SIDE
AKX01537
AKX01537
1
2
3 4
5 6
7 8
10 11 12 13 14 15 16 17 18 19 20 21 22 23
24 25
26 27 28 29
30 31 32 33
34 35
C-89 HARNESS CONNECTOR:
HARNESS SIDE
AH
9
AK103914
2
3
4
5
6
7
8
9
11
12
13
14
15
16
17
18
19
20
30
21
22
23
24
25
26
27
28
29
31
32
33
34
35
1
10
AB
CONNECTOR: C-89
C-89(GR)
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-271
STEP 7. Check for open circuit or short circuit to ground
between right bank heated oxygen sensor (rear) connector
E-47 (terminal No. 3) and PCM connector C-89 (terminal
No. 27).
NOTE: Check harness after checking intermediate connector
C-79 and E-45. If intermediate connectors are damaged, repair
or replace them. Refer to GROUP 00E, Harness Connector
Inspection
. Then go to Step 12.
Q: Is the harness wire in good condition?
YES : Replace the PCM. Then go to Step 12.
NO : Repair it. Then go to Step 12.
AK200492
1
2
3
4
E-47(GR)
AB
CONNECTOR: E-47
HARNESS
CONNECTOR:
COMPONENT SIDE
RIGHT BANK
HEATED OXYGEN
SENSOR (REAR)
AK103914
2
3
4
5
6
7
8
9
11
12
13
14
15
16
17
18
19
20
30
21
22
23
24
25
26
27
28
29
31
32
33
34
35
1
10
AB
CONNECTOR: C-89
C-89(GR)
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-272
STEP 8. Check connector C-89 at PCM for damage.
Q: Is the connector in good condition?
YES : Go to Step 9.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 12.
STEP 9. Check for harness damage between MFI relay
connector C-59 (terminal No. 1) and right bank heated
oxygen sensor (rear) connector E-47 (terminal No. 1).
AK103914
2
3
4
5
6
7
8
9
11
12
13
14
15
16
17
18
19
20
30
21
22
23
24
25
26
27
28
29
31
32
33
34
35
1
10
AB
CONNECTOR: C-89
C-89(GR)
HARNESS CONNECTOR:
COMPONENT SIDE
AK200023
2 1
3
4
CONNECTOR: C-59
AB
C-59
HARNESS
CONNECTOR:
COMPONENT
SIDE
AK200492
1
2
3
4
E-47(GR)
AB
CONNECTOR: E-47
HARNESS
CONNECTOR:
COMPONENT SIDE
RIGHT BANK
HEATED OXYGEN
SENSOR (REAR)
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