Mitsubishi Eclipse. Manual - part 240

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-453

DTC P0403: EGR Control circuit

AK301279

1 2

5 6

3 4
7 8

2

1

RED

-

WHITE

RED

-

WHITE

RED

-

WHITE

RED

RED

BL

UE-

RED

BL

UE-

RED

BATTERY

EGR Vacuum Regulator Solenoid Valve Circuit

MFI
RELAY

     B-13
MU802749

B-31

EGR VACUUM REGULATOR
SOLENOID VALVE

4

1

2

3

1

2

5

6

6

ENGINE CONTROL
MODULE (ECM) <M/T>
OR
POWERTRAIN CONTROL
MODULE (PCM) <A/T>

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

3132 33

34 35

1

14

4

19

5

22

6

17

8

15

9

18

7

20

16

2

13

12

23 24 25 26

21

1

3

10

C-49 <M/T>
(MU803773)

C-50 <A/T>
(MU803784)

10 11

3 4

1 2

A-18X

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-454

.

CIRCUIT OPERATION

• The EGR vacuum regulator solenoid valve power 

is supplied from the MFI relay (terminal No. 4).

• The ECM <M/T> or PCM <A/T> controls the 

exhaust EGR vacuum regulator solenoid valve 
ground by turning the power transistor in the 
ECM <M/T> or PCM <A/T> "ON" and "OFF".

.

TECHNICAL DESCRIPTION

• To judge if there is open circuit in the EGR vac-

uum regulator solenoid valve drive circuit, ECM 
<M/T> or PCM <A/T> measures the surge volt-
age of the EGR vacuum regulator solenoid valve 
coil.

• The ECM <M/T> or PCM <A/T> drives the EGR 

vacuum regulator solenoid valve. After the sole-
noid is turned off, the ECM <M/T> or PCM <A/T> 
will check if the solenoid coil produces a surge 
voltage of 2 volts or more.

.

DESCRIPTIONS OF MONITOR METHODS
Off-surge does not occur after solenoid is operated 

on to off.

.

MONITOR EXECUTION
Once per driving cycle

.

MONITOR EXECUTION CONDITIONS (Other 
monitor and Sensor)

Other Monitor (There is no temporary DTC stored 

in memory for the item monitored below)

• Not applicable

Sensor (The sensor below is determined to be 

normal)

• Not applicable

.

AK300055

CONNECTOR: B-31

AB

B-31 (BR)

EGR VACUUM 
REGULATOR
SOLENOID VALVE

AK300060

ECM

CONNECTOR: C-49 <M/T>

AC

C-49 (G)

AK300060AD

C-50 (GR)

PCM

CONNECTOR: C-50 <A/T>

AK300121

MFI RELAY

CONNECTOR: A-18X

AB

A-18X

AK300067

CONNECTOR: B-13

AB

B-13 (B)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-455

DTC SET CONDITIONS

Logic Flow Chart

.

Check Conditions

• Engine is being cranked.

• Battery positive voltage is at between 10 and 

16.5 volts.

Judgment Criteria

• The EGR vacuum regulator solenoid valve coil 

surge voltage (battery positive voltage + 2 volts) 
is not detected for 0.2 second.

• The ECM <M/T> or PCM <A/T> monitors for this 

condition once during the drive cycle.

Check Conditions

• Battery positive voltage is at between 10 and 

16.5 volts.

• ON duty cycle of the EGR vacuum regulator sole-

noid valve is between 10 and 90 percent.

• ON duty cycle of the evaporative emission purge 

solenoid is 0 percent.

• Evaporative emission ventilation solenoid is OFF.

• More than 1 second has elapsed after the above 

mentioned conditions have been met. 

Judgment Criteria

• The EGR vacuum regulator solenoid valve coil 

surge voltage (battery positive voltage + 2 volts) 
is not detected for 1 second. When the EGR vac-
uum regulator solenoid valve is turned OFF.

.

OBD-ll DRIVE CYCLE PATTERN
Refer to Diagnostic Function 

− OBD-ll Drive Cycle − 

Procedure 6 

− Other Monitor 

P.13A-5

.

.

TROUBLESHOOTING HINTS (The most likely 
causes for this code to be set are: )

• EGR vacuum regulator solenoid valve failed.

• Open or shorted EGR vacuum regulator solenoid 

valve circuit, or harness damage or connector 
damage.

• ECM failed. <M/T>

• PCM failed. <A/T>

START

END

MALFUNCTION

GOOD

MONITORING

CONDITIONS

WAS SURGE VOLTAGE

(> V

B

+2V) DETECTED?

NO

NO

YES

YES

AK204017

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-456

DIAGNOSIS

Required Special Tools:

• MB991958 (MUT-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991911: Main Harness B

STEP 1. Using scan tool MB991958, check actuator test 
item 10: EGR vacuum regulator solenoid valve.

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) Set scan tool MB991958 to the actuator test mode for item 

10, EGR vacuum regulator solenoid valve.

• An operation sound should be heard and vibration 

should be felt when the EGR vacuum regulator solenoid 
valve 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.

AK300810

AB

MB991911

16-PIN

MB991827

MB991824