Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 165

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-359

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 2 and ECM connector C-49 terminal 1 <M/T> or
PCM connector C-50 terminal 1 <A/T> when checking No.1
cylinder.

b. Check the harness wire between injector connector B-02

terminal 2 and ECM connector C-49 terminal 14 <M/T> or
PCM connector C-50 terminal 9 <A/T> when checking No.2
cylinder.

c. Check the harness wire between injector connector B-05

terminal 2 and ECM connector C-49 terminal 2 <M/T> or
PCM connector C-50 terminal 24 <A/T> when checking
No.3 cylinder.

d. Check the harness wire between injector connector B-06

terminal 2 and ECM connector C-49 terminal 15 <M/T> or
PCM connector C-50 terminal 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.

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 Tool:
MB991502: Scan Tool (MUT-II)

AK000273AB

AK000273

CONNECTOR : B-01, B-02, B-05, B-06

B-01 B-02 B-05 B-06

AK000280

C-49,C-50

ECM<M/T>
OR
PCM<A/T>

CONNECTORS:C-49<M/T>,C-50<A/T>

BC

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-360

STEP 1. Check 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, Batter -Battery check (

P.54A-

5

).

STEP 2. Using scan tool MB991502, read the diagnostic
trouble code (DTC).

CAUTION

To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 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 the DTC is output?

YES : Refer to Diagnostic Trouble Code Chart (

P.13A-20

).

NO : Go to Step 3.

STEP 3. Using scan tool MB991502, 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 (

P.13A-450

).

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 MB991502, 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 (

P.13A-442

).

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.

AKX01177

16 PIN

MB991502

AB

AKX01177

16 PIN

MB991502

AB

AKX01177

16 PIN

MB991502

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-361

STEP 5. Check the ignition timing.
(1) Check the ignition timing at cranking.

Standard value:5

°

BTDC

±

3

°

Q: Is the ignition timing normal?

YES : Go to Step 6.
NO : Check that the crankshaft position sensor and timing

belt cover are in the correct position. Then confirm
that the malfunction symptom is eliminated.

STEP 6. Check harness connector B-01 or B-02 or B-05 or
B-06 at injector for damage.
Q: Is the harness connector in good condition?

YES : Go to Step 7.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection (

P.00E-2

). Then confirm that

the malfunction symptom is eliminated.

STEP 7. Check the injector.
(1) Disconnect the injector connector B-01, B-02, B-05, B-06.
(2) Measure the resistance between each injector side

connector terminal 1 and 2.

Standard value:13-16 ohm [at 20

°

C (68

°

F)]

Q: Is the resistance standard value?

YES : Go to Step 8.
NO : Repair the injector. Then confirm that the malfunction

symptom is eliminated.

AK000273AB

AK000273

CONNECTOR : B-01, B-02, B-05, B-06

B-01 B-02 B-05 B-06

AK000273AB

AK000273

CONNECTOR : B-01, B-02, B-05, B-06

B-01 B-02 B-05 B-06

AK000559

2

1

INJECTOR SIDE
CONNECTOR

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-362

STEP 8. 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 9.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection (

P.00E-2

). Then confirm that

the malfunction symptom is eliminated.

STEP 9. 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 2 and ECM connector C-49 terminal 1 <M/T> or
PCM connector C-50 terminal 1 <A/T> when checking No.1
cylinder.

b. Check the harness wire between injector connector B-02

terminal 2 and ECM connector C-49 terminal 14 <M/T> or
PCM connector C-50 terminal 9 <A/T> when checking No.2
cylinder.

c. Check the harness wire between injector connector B-05

terminal 2 and ECM connector C-49 terminal 2 <M/T> or
PCM connector C-50 terminal 24 <A/T> when checking
No.3 cylinder.

d. Check the harness wire between injector connector B-06

terminal 2 and ECM connector C-49 terminal 15 <M/T> or
PCM connector C-50 terminal 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 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.

AK000280

C-49,C-50

ECM<M/T>
OR
PCM<A/T>

CONNECTORS:C-49<M/T>,C-50<A/T>

BC

AK000273AB

AK000273

CONNECTOR : B-01, B-02, B-05, B-06

B-01 B-02 B-05 B-06

AK000280

C-49,C-50

ECM<M/T>
OR
PCM<A/T>

CONNECTORS:C-49<M/T>,C-50<A/T>

BC