Mitsubishi Outlander XL. Manual - part 233

CIRCUIT OPERATION

｠

A 5-volt voltage is supplied to the manifold absolute
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 manifold
pressure is sent to the ECM (terminal No. 45) from
the  manifold  absolute  pressure  sensor  output
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

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

13Ab-127

DIAGNOSTIC TROUBLE CODE PROCEDURES

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

Logic Flow Chart

Start

Yes

Yes

Yes

Yes

Yes

No

No

No

No

No

Pressure < 

45kPa

Coolant tempe ratur e

at engine sta rt < 

0degC

Continuous

failure for 2secs

Malfunction

End

Good

Monitoring

conditions

8min. later after

engine start

ZK603679 AA00

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 higher than 1,500 r/min.

｠

Throttle  position  sensor  output  voltage  is  higher
than 3.5 volts.

Judgement Criterion

｠

Manifold absolute pressure is 45 kPa (13.3 in.Hg)
or lower for 2 seconds.

13Ab-128

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

DIAGNOSTIC TROUBLE CODE PROCEDURES

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

Logic Flow Chart

Start

Yes

Yes

Yes

Yes

Yes

No

No

No

No

No

Pressure < 

89kPa

Coolant tempe ratur e

at engine sta rt < 

0degC

Continuous

failure for 2secs

Malfunction

End

Good

Monitoring

conditions

8min. later after

engine start

ZK603680 AA00

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 lower than 1,500 r/min.

｠

Throttle position sensor output voltage is lower than
0.9 volt.

Judgement Criterion

｠

Manifold absolute pressure is 89 kPa (26.3 in.Hg)
or higher for 2 seconds.

OBD-II DRIVE CYCLE PATTERN

Refer to Diagnostic Function - OBD-II Drive Cycle -
Pattern 7 P.13Ab-8.

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

13Ab-129

DIAGNOSTIC TROUBLE CODE PROCEDURES

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

｠

Manifold absolute pressure sensor failed.

｠

Harness damage.

｠

Connector damage.

｠

ECM failed.

 

DIAGNOSIS

Required Special Tools:

｠

MB991958: Scan Tool (M.U.T.-III Sub Assembly)

｠

MB991824: V.C.I.

｠

MB991827: USB Cable

｠

MB991910: Main Harness A

STEP 1. Using scan tool MB991958, check data list item 8:
Manifold Absolute Pressure Sensor.

ZC501967

AC404789

ZC5019680000

MB991824

MB991827

MB991910

Data link

connector

To prevent damage to scan tool MB991958, always turn the
ignition  switch  to  the  "LOCK"  (OFF)  position  before
connecting 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
8, Manifold Absolute 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)

Start the engine.

｠

When the engine is idling, 16 - 36 kPa (4.7 - 10.6 in.Hg).

｠

When  the  engine  is  suddenly  revved,  manifold  absolute
pressure varies.

(5)

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 - How to Cope
with Intermittent Malfunctions P.00-15.

NO:

 Go to Step 2.

STEP 2. Check harness connector B-105 at the manifold
absolute pressure sensor and harness connector B-10 at
ECM for damage.

Q:Is the harness connector in good condition?

YES:

 Go to Step 3.

NO:

 Repair it. Refer to GROUP 00E, Harness Connector

Inspection P.00E-2. Then go to Step 5.

13Ab-130

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

DIAGNOSTIC TROUBLE CODE PROCEDURES