Mitsubishi Eclipse. Manual - part 540

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-703

STEP 10. Check the harness wire between ECM connector 
C-58 terminal 42 <M/T> or PCM connector C-55 terminal 46 
<A/T> and intermediate connector D-16 terminal 8 for 
damage.
Q: Is the harness wire in good condition?

YES : Go to Step 22.
NO :  Repair it. Then go to 22.

STEP 11. Check the circuit voltage at intermediate 
connector D-16. 
(1) Use special tools (MB991658 and MB991709) to connect 

terminals 5 and 8 between connectors of the intermediate 
connector D-16 respectively.

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage at the male side connector between 

terminal 6 and ground.

• The voltage should be 0.5 volt or less.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Remove the special tools and connect intermediate 

connector D-16.

Q: Is the voltage normal?

YES : Go to Step 12.
NO :  Go to Step 15.

AC001689

CONNECTOR: C-58 <M/T>, C-55 <A/T>

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

C-58 
<M/T>

C-55 
<A/T>

AO

AC001787AD

CONNECTOR: D-16

AC106525

AB

MB991709

MB991658

INTERMEDIATE 
CONNECTOR D-16

INTERMEDIATE 
CONNECTOR D-16

AC106528

1

2 3 4 5 6

7

8

9

10

AB

INTERMEDIATE 
CONNECTOR D-16
MALE SIDE 
CONNECTOR

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-704

STEP 12. Check connectors C-28, C-90, D-16 at 
intermediate connector and C-58 at ECM <M/T> or C-55 at 
PCM <A/T> for damage.
Q: Are the connectors in good condition?

YES : Go to Step 13.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 22.

AC001741 AJ

CONNECTOR: C-28

AC001991

CONNECTOR: C-90

CONNECTOR
BLOCK (LH)

AI

AC001787AD

CONNECTOR: D-16

AC001689

CONNECTOR: C-58 <M/T>, C-55 <A/T>

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

C-58 
<M/T>

C-55 
<A/T>

AO

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-705

STEP 13. Check the harness wire between ECM connector 
C-58 terminal 49 <M/T> or PCM connector C-55 terminal 57 
<A/T> and intermediate connector D-16 terminal 6 for 
damage.
Q: Is the harness wire in good condition?

YES : Go to Step 14.
NO :  Repair it. Then go to 22.

STEP 14. Check the ground voltage at ECM connector C-58 
<M/T> or PCM connector C-55 <A/T> by backprobing.
(1) Do not disconnect ECM connector C-58 <M/T> or PCM 

connector C-55 <A/T>.

(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 49 <M/T> or terminal 

57 <A/T> and ground by backprobing.

• The voltage should be 0.5 volt or less.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage normal?

YES : Go to Step 18.
NO :  Go to Step 21.

AC001689

CONNECTOR: C-58 <M/T>, C-55 <A/T>

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

C-58 
<M/T>

C-55 
<A/T>

AO

AC001787AD

CONNECTOR: D-16

AC002085

HARNESS SIDE 
CONNECTOR

<M/T> C-58

<A/T> C-55

AC

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-706

STEP 15. Check connectors D-16 at intermediate 
connector and D-18 at fuel tank differential pressure 
sensor for damage.
Q: Are the connectors in good condition?

YES : Go to Step 16.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 22.

STEP 16. Check the harness wire between intermediate 
connector D-16 terminal 8 and fuel tank differential 
pressure sensor connector D-18 terminal 3 for damage.
Q: Is the harness wire in good condition?

YES : Go to Step 17.
NO :  Repair it. Then go to 22.

AC001787AD

CONNECTOR: D-16

AC103356

FUEL TANK

AD

CONNECTOR: D-18
FUEL TANK DIFFERENTIAL 
PRESSURE SENSOR

AC001787AD

CONNECTOR: D-16

AC103356

FUEL TANK

AD

CONNECTOR: D-18
FUEL TANK DIFFERENTIAL 
PRESSURE SENSOR