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Mitsubishi Eclipse. Manual - part 308

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-725

STEP 18. 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 − Procedure 6 −

Other Monitor

P.13A-5

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P2228 set?

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

DTC P2229: Barometric Pressure Circuit High Input

AK300332

4 5 6

1 2 3

GREEN-

YELL

GREEN-

WHITE

BROWN

C-54 <A/T>
(MU803781)

C-60 <M/T>
(MU803772)

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

81 <M/T>*1
46 <A/T>*3

5 V

85 <M/T>*1
55 <A/T>*3

40 <M/T>*2
16 <A/T>*4

B-14

BAROMETRIC PRESSURE SENSOR
(INCORPORATED IN VOLUME
AIRFLOW SENSOR)

89 90 91 92

83 84

42 43
48 49 50 51 52 53 54 55 56 57

58 59

60 61 62 63

64 65 66

Barometric Pressure Sensor Circuit

3 4

5 6

7 8

11 12 13 14 15 16 17 18 19 20

21 22 23

24 25

26 27 28 29

3132 33

34 35

C-50 <A/T>
(MU803784)

NOTE
*1: ECM connector C-60 <M/T>
*2: ECM connector C-53 <M/T>
*3: PCM connector C-54 <A/T>
*4: PCM connector C-50 <A/T>

C-53 <M/T>
(MU803771)

40 41

43 44

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-726

CIRCUIT OPERATION

• A 5-volt voltage is supplied to the barometric

pressure sensor power terminal (terminal No. 1)
from the ECM (terminal No. 81) <M/T> or PCM
(terminal No. 46) <A/T>. The ground terminal
(terminal No. 5) is grounded with ECM (terminal
No. 40) <M/T> or PCM (terminal No. 16) <A/T>.

• A voltage that is proportional to the atmospheric

pressure is sent to the ECM (terminal No. 85)
<M/T> or PCM (terminal No. 55) <A/T> from the
barometric pressure sensor output terminal (ter-
minal No. 2).

TECHNICAL DESCRIPTION

• The barometric pressure sensor outputs a volt-

age which corresponds to the barometric pres-
sure.

• The ECM <M/T> or PCM <A/T> checks whether

this voltage is within a specified range.

DESCRIPTIONS OF MONITOR METHODS
Barometric pressure sensor output voltage is out of

reasonable barometric pressure range.

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)

• Not applicable

AK300053

CONNECTOR: B-14

BAROMETRIC
PRESSURE
SENSOR

B-14 (B)

AK300060

ECM

CONNECTORS: C-53, C-60 <M/T>

C-53 (G)

C-60 (G)

AK300060

PCM

CONNECTORS: C-50, C-54 <A/T>

C-54 (GR)

C-50 (GR)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-727

DTC SET CONDITIONS

Logic Flow Chart

Check Conditions

• 2 seconds or more have passed since the start-

ing sequence was completed.

• Battery positive voltage is higher than 8 volts.

Judgement Criteria

• Barometric pressure sensor output has continued

to be 113 kPa (33.4 in.Hg) or higher approxi-
mately 4,000 ft below sea level for 10 seconds.

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: )

• Barometric pressure sensor failed.

• Open barometric pressure sensor circuit, or con-

nector damage.

• ECM failed. <M/T>

• PCM failed. <A/T>

DIAGNOSIS

Required Special Tools:

• MB991958 (MUT-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991911: Main Harness B

START

END

YES

MALFUNCTION

GOOD

YES

AK301456

MONITORING

CONDITIONS

BAROMETRIC PRESSURE

< 50kPa (14.8in.Hg)

BAROMETRIC PRESSURE

> 113kPa (33.4in.Hg)

CONTINUOUS

FAILURE FOR 10secs

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-728

STEP 1. Using scan tool MB991958, check data list item 25:
Barometric Pressure Sensor.

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 MB99150 or
MB9919582.
(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 data reading mode for item

25, Barometric Pressure Sensor.

• When altitude is 0 m (0 foot), 101 kPa (29.8 in.Hg).

• When altitude is 600 m (1,969 feet), 95 kPa (28.1 in.Hg).

• When altitude is 1,200 m (3,937 feet), 88 kPa (26.0

in.Hg).

• When altitude is 1,800 m (5,906 feet), 81 kPa (23.9

in.Hg).

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor 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. Measure the sensor output voltage at barometric
pressure sensor connector B-14 by backprobing.
(1) Do not disconnect the connector B-14.
(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal No. 2 and ground by

backprobing.

• When altitude is 0 m (0 foot), voltage should be 3.7 and

4.3 volts.

• When altitude is 600 m (1,969 feet), voltage should be

3.4 and 4.0 volts.

• When altitude is 1,200 m (3,937 feet), voltage should be

3.2 and 3.8 volts.

• When altitude is 1,800 m (5,906 feet), voltage should be

2.9 and 3.5 volts.

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

YES : Go to Step 3.
NO : Go to Step 5.

AK300810

MB991911

16-PIN

MB991827

MB991824

AK300078

CONNECTOR: B-14

B-14 (B)

HARNESS
CONNECTOR:
COMPONENT SIDE

AKX01520AG

1 2 3 4 5 6 7

B-14 HARNESS
CONNECTOR:
HARNESS SIDE

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