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
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