Mitsubishi Eclipse. Manual — part 318
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-765
STEP 10. Check connector C-49 at ECM <M/T> or
connector C-50 at PCM <A/T> for damage.
Q: Is the connector in good condition?
YES : Go to Step 11.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then confirm that the
malfunction symptom is eliminated.
AK300413
1
14
4
19
5
22
6
17
8
15
9
18
7
20
16
2
21
23
26
24
25
3
10
11
12
13
CONNECTOR: C-49 <M/T>
C-49 (G)
AB
HARNESS CONNECTOR:
COMPONENT SIDE
AK300414
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
C-50 (GR)
CONNECTOR: C-50 <A/T>
AB
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-766
STEP 11. Check for harness damage between injector
connector and ECM <M/T> or PCM <A/T> connector.
a. Check the harness wire between injector connector B-01
(terminal No. 2) and ECM connector C-49 (terminal No. 1)
<M/T> or PCM connector C-50 (terminal No. 1) <A/T> when
checking No. 1 cylinder.
b. Check the harness wire between injector connector B-02
(terminal No. 2) and ECM connector C-49 (terminal No. 14)
<M/T> or PCM connector C-50 (terminal No. 9) <A/T> when
checking No. 2 cylinder.
c. Check the harness wire between injector connector B-05
(terminal No. 2) and ECM connector C-49 (terminal No. 2)
<M/T> or PCM connector C-50 (terminal No. 24) <A/T>
when checking No. 3 cylinder.
d. Check the harness wire between injector connector B-06
(terminal No. 2) and ECM connector C-49 (terminal No. 15)
<M/T> or PCM connector C-50 (terminal No. 2) <A/T> when
checking No. 4 cylinder.
Q: Is the harness wire in good condition?
YES : Check the following items, and repair or replace the
defective items.
a. Check the ignition coil, spark plugs, spark plug
cables.
b. Check if the injectors are clogged.
c. Check compression pressure.
d. Check fuel lines for clogging.
e. Check if the foreign materials (water,
kerosene, etc.) got into fuel.
Then confirm that the malfunction symptom is
eliminated.
NO : Repair it. Then confirm that the malfunction symptom
is eliminated.
AK300737
1
2
CONNECTORS: B-01, B-02, B-05, B-06
AB
B-02 (GR)
B-01 (GR)
B-05 (GR)
B-06 (GR)
HARNESS CONNECTOR:
COMPONENT SIDE
AK300413
1
14
4
19
5
22
6
17
8
15
9
18
7
20
16
2
21
23
26
24
25
3
10
11
12
13
CONNECTOR: C-49 <M/T>
C-49 (G)
AB
HARNESS CONNECTOR:
COMPONENT SIDE
AK300414
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
C-50 (GR)
CONNECTOR: C-50 <A/T>
AB
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-767
INSPECTION PROCEDURE 7: Hard Starting
.
COMMENT
• In cases such as the above, the cause is usually
either weak spark, improper air-fuel mixture or
low compression.
.
TROUBLESHOOTING HINTS (The most likely
causes for this case: )
• Malfunction of the ignition system.
• Malfunction of the injector system.
• Poor fuel quality. (Contamination)
• Poor compression.
DIAGNOSIS
Required Special Tools:
• MB991958 (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991911: Main Harness B
STEP 1. Measure the battery positive voltage.
(1) Measure the battery positive voltage during cranking.
• The voltage is 8 volts or more.
Q: Is the voltage normal?
YES : Go to Step 2.
NO : Refer to GROUP 54A, Battery
− Battery Check
STEP 2. Using scan tool MB991958, read the diagnostic
trouble code (DTC).
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Read the DTC.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC set?
YES : Refer to Diagnostic Trouble Code Chart
NO : Go to Step 3.
AK300810
AB
MB991911
16-PIN
MB991827
MB991824
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-768
STEP 3. Using scan tool MB991958, check actuator test.
(1) Turn the ignition switch to the "ON" position.
(2) Check the following items in the actuator test. Refer to
Actuator Test Reference Table
a. Item 07: Fuel Pump.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the actuator operating properly?
YES : Go to Step 4.
NO : Repair or Replace. Then confirm that the malfunction
symptom is eliminated.
STEP 4. Using scan tool MB991958, check data list.
(1) Turn the ignition switch the "ON" position.
(2) Check the following items in the data list. Refer to Data List
Reference Table
a. Item 21: Engine Coolant Temperature Sensor.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?
YES : Go to Step 5.
NO : Repair or Replace. Then confirm that the malfunction
symptom is eliminated.
AK300810
AB
MB991911
16-PIN
MB991827
MB991824
AK300810
AB
MB991911
16-PIN
MB991827
MB991824
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