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Mitsubishi Montero Sport (2004+). Manual - part 324

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-709

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-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function

− OBD-II Drive Cycle −

Procedure 6

− Other Monitor

P.13A-4

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.

• PCM failed.

DIAGNOSIS

Required Special Tools:

• MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: V.C.I

• MB991827: USB Cable

• MB991911: Main Harness B

START

END

YES

MALFUNCTION

GOOD

YES

AK304167

MONITORING

CONDITIONS

BAROMETRIC PRESSURE

< 49.5kPa (14.6in.Hg)

BAROMETRIC PRESSURE

> 113kPa (33.4in.Hg)

CONTINUOUS

FAILURE FOR 10secs

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-710

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 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 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.00-7

NO : Go to Step 2.

STEP 2. Measure the sensor output voltage at barometric
pressure sensor connector A-01 by backprobing.
(1) Do not disconnect the connector A-01.
(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 measure

between 3.7 and 4.3 volts.

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

measure between 3.4 and 4.0 volts.

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

measure between 3.2 and 3.8 volts.

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

measure between 2.9 and 3.5 volts.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage within the specified range?

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

AK303629AB

MB991911

MB991827

MB991824

16-PIN

AK103913

CONNECTOR: A-01

A-01(B)

HARNESS
CONNECTOR:
COMPONENT SIDE

AKX01520AJ

A-01 HARNESS
CONNECTOR:
HARNESS SIDE

1 2 3 4 5 6 7

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-711

STEP 3. Check connector A-01 at the barometric pressure
sensor and connector C-90 at PCM for damage.
Q: Is the connector in good condition?

YES : Go to Step 4.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 12.

STEP 4. Using scan tool MB991958, check data list item 25:
Barometric Pressure Sensor.

CAUTION

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.00-7

NO : Replace the PCM. Then go to Step 12.

AK103913

CONNECTOR: A-01

A-01(B)

HARNESS
CONNECTOR:
COMPONENT SIDE

AK103762

46 45 44

CONNECTOR: C-90

C-90(GR)

HARNESS CONNECTOR:
COMPONENT SIDE

AK303629AB

MB991911

MB991827

MB991824

16-PIN

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-712

STEP 5. Measure the sensor supply voltage at barometric
pressure sensor connector A-01 by backprobing
(1) Do not disconnect the connector A-01.
(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal No. 1 and ground by

backprobing.

• Voltage should be between 4.8 and 5.2 volts.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage between 4.8 and 5.2 volts?

YES : Go to Step 7.
NO : Go to Step 6.

STEP 6. Check connector C-90 at PCM for damage.
Q: Is the connector in good condition?

YES : Replace the PCM. 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.

AK103913

CONNECTOR: A-01

A-01(B)

HARNESS
CONNECTOR:
COMPONENT SIDE

AKX01521AI

A-01 HARNESS
CONNECTOR:
HARNESS SIDE

1 2 3 4 5 6 7

AK103762

46 45 44

CONNECTOR: C-90

C-90(GR)

HARNESS CONNECTOR:
COMPONENT SIDE

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