Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 273

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-291

STEP 1. Using scan tool MB991502, check actuator test
item 08: Evaporative Emission Purge Solenoid.

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) Set scan tool MB991502 to the actuator test mode for item

08, Evaporative emission purge solenoid.

•

An operation sound should be heard and vibration
should be felt when the evaporative emission purge
solenoid is operated.

(4) Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the solenoid operating properly?

YES : It can be assumed that this malfunction is intermittent.

Refer to GROUP 00, How to Use Troubleshooting/
Inspection Service Points (

P.00-6

).

NO : Go to Step 2.

STEP 2. Check connector B-33 at the evaporative emission
purge solenoid for damage.
Q: Is the connector in good condition?

YES : Go to Step 3.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection (

P.00E-2

). Then go to Step 12.

AKX01177

16 PIN

MB991502

AB

ACX02514 AK

EVAPORATIVE
EMISSION
PUREGE
SOLENOID
VALVE

CONNECTOR:B-33

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-292

STEP 3. Check the evaporative emission purge solenoid.
(1) Disconnect the evaporative emission purge solenoid

connector B-33.

(2) Measure the resistance between evaporative emission

purge solenoid side connector terminal 1 and 2.

Standard value: 30

−

34

Ω

[at 20

°

C (68

°

F)]

Q: Is the resistance at the standard value?

YES : Go to Step 4.
NO : Replace the evaporative emission purge solenoid.

Then go to Step 12.

STEP 4. Check the power supply voltage at evaporative
emission purge solenoid harness side connector B-33.
(1) Disconnect the connector B-33 and measure at the harness

side.

(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 2 and ground.

•

Voltage should be battery positive voltage.

(4) Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the voltage normal?

YES : Go to Step 6.
NO : Go to Step 5.

STEP 5. Check connector A-21X at MFI relay for damage.
Q: Is the connector in good condition?

YES : Repair harness wire between MFI relay connector A-

21X terminal 1 and evaporative emission purge
solenoid connector B-33 terminal 2 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 (

P.00E-2

). Then go to Step 12.

ACX02514 AK

EVAPORATIVE
EMISSION
PUREGE
SOLENOID
VALVE

CONNECTOR:B-33

AKX00342

AKX01502

1

2

B-33 HARNESS
SIDE CONNECTOR

AH

AK000226

AK000226AB

CONNECTOR : A-21X

MFI RELAY

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-293

STEP 6. Check the power supply voltage at ECM connector
C-51 <M/T> or PCM connector <A/T> C-52 by backprobing
(1) Do not disconnect the connector C-51 <M/T> or C-52 <A/

T>.

(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 16 <M/T> or 34 <A/

T> and ground by backprobing.

•

Voltage should be battery positive voltage.

(4) Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the voltage normal?

YES : Go to Step 9.
NO : Go to Step 7.

STEP 7. Check connector C-51 at ECM <M/T> or connector
C-52 at PCM <A/T> for damage.
Q: Is the connector in good condition?

YES : Go to Step 8.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection (

P.00E-2

). Then go to Step 12.

AK000256

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-51 CONNECTOR
HARNESS SIDE VIEW

AC

9

AK000256

<M/T>

AKX01547

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-52 CONNECTOR
HARNESS SIDE VIEW

AE

9

<A/T>

AK000225

CONNECTOR : C-51<M/T>, C-52<A/T>

C-52

C-51

PCM<A/T>

ECM<M/T>

AJ

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-294

STEP 8. Check for open circuit and short circuit to ground
between evaporative emission purge solenoid connector
B-33 terminal 1 and ECM connector C-51 terminal 16 <M/T>
or PCM connector C-52 terminal 34 <A/T>.
Q: Is the harness wire in good condition?

YES : Replace the ECM or PCM. Then go to Step 12.
NO : Repair it. Then go to Step 12.

STEP 9. Check connector C-51 at ECM <M/T> or connector
C-52 at PCM <A/T> for damage.
Q: Is the connector in good condition?

YES : Go to Step 10.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection (

P.00E-2

). Then go to Step 12.

ACX02514 AK

EVAPORATIVE
EMISSION
PUREGE
SOLENOID
VALVE

CONNECTOR:B-33

AK000225

CONNECTOR : C-51<M/T>, C-52<A/T>

C-52

C-51

PCM<A/T>

ECM<M/T>

AJ

AK000225

CONNECTOR : C-51<M/T>, C-52<A/T>

C-52

C-51

PCM<A/T>

ECM<M/T>

AJ