Mitsubishi Lancer Evolution X. Manual - part 270

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-145

STEP 8. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to 

Diagnostic Function − OBD-II Drive Cycle − Pattern 23 

P.13A-9

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0103 set?

YES : Retry the troubleshooting.
NO :  The inspection is complete.

DTC P0106: Manifold Absolute Pressure Circuit Range/Performance Problem

AK604115

1

2

3 4 5 6 7 8 9 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 36 37 38 39 40 41 42 43 44 45 46 47 48

49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64

3

2

1

AC

MANIFOLD ABSOLUTE
PRESSURE SENSOR

BLUE

3

1

2

MANIFOLD ABSOLUTE PRESSURE SENSOR CIRCUIT

B-09

B-18

(MU802723)

44

45

46

ENGINE
CONTROL
MODULE

YELLO

W

-BLUE

BLA

CK-WHITE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-146

.

CIRCUIT OPERATION

• A 5-volt voltage is supplied to the manifold abso-

lute pressure sensor power terminal (terminal No. 
3) from the ECM (terminal No. 44). The ground 
terminal (terminal No. 2) is grounded with ECM 
(terminal No. 46).

• A voltage that is proportional to the intake mani-

fold pressure is sent to the ECM (terminal No. 45) 
from the manifold absolute pressure sensor out-
put terminal (terminal No. 1).

.

TECHNICAL DESCRIPTION

• The manifold absolute pressure sensor outputs a 

voltage which corresponds to the intake manifold 
pressure.

• The ECM checks whether this voltage is within a 

specified range.

.

DESCRIPTIONS OF MONITOR METHODS

Compare load value with manifold absolute pressure 

sensor output voltage.

.

MONITOR EXECUTION

Continuous

.

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)

• Engine coolant temperature sensor
• Throttle position sensor
• Mass airflow sensor
• Intake air temperature sensor
• Barometric pressure sensor

.

AK704227

Connector: B-09

ECM

B-09 (GR)

AB

AK704238 AB

Manifold absolute
pressure sensor

Connector: B-18

B-18 (B)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-147

DTC SET CONDITIONS <Range/Performance problem − high input>

Logic Flow Chart

Check Conditions

• 8 minutes or more have passed since the engine 

starting sequence was completed, when the 
engine coolant temperature at engine start is 0° C 

(32° F) or lower.

• Engine speed is between 500 r/min and 1,500 

r/min.

• Throttle position sensor output voltage is 0.8 volt 

or lower.

Judgement Criterion

• Manifold absolute pressure sensor output voltage 

has continued to be 1.3 volts [corresponding to a 
manifold absolute pressure of 89 kPa (26.3 
in.Hg)] or higher for 2 seconds.

.

Start

Yes

Yes

Yes

No

No

No

Pressure > 89kPa (26.3in.Hg)

Continuous

failure for 2secs

Malfunction

End

Good

Monitoring

conditions

AK604311

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-148

DTC SET CONDITIONS <Range/Performance problem − low input>

Logic Flow Chart

Check Conditions

• 8 minutes or more have passed since the engine 

starting sequence was completed, when the 
engine coolant temperature at engine start is 0° C 

(32° F) or lower.

• Engine speed is 1,500 r/min or higher.
• Throttle position sensor output voltage is 3.5 volts 

or higher.

Judgement Criterion

• Manifold absolute pressure sensor output voltage 

has continued to be 0.7 volt [corresponding to a 
manifold absolute pressure of 46 kPa (13.6 
in.Hg)] or lower for 2 seconds.

.

FAIL-SAFE AND BACKUP FUNCTION

• None

.

OBD-II DRIVE CYCLE PATTERN

Refer to Diagnostic Function − OBD-II Drive Cycle − 

Pattern 6 

P.13A-9

.

.

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

• Manifold absolute pressure sensor failed.
• Harness damage.
• Connector damage.
• ECM failed.

Start

Yes

Yes

Yes

No

No

No

Pressure < 46kPa (13.6in.Hg)

Continuous

failure for 2secs

Malfunction

End

Good

Monitoring

conditions

AK800581