Mitsubishi Outlander XL. Manual — part 230
DTC P0102: Mass Airflow Circuit Low Input
M11310100171USA0000010000
ZK602833
71 72 73 74 75 76 77 78 79 80 81 82
83 84 85 86 87 88 89 90 91 92 93 94
95 96 97 98 99
100 101 102 103 104
112 113 114
109
108
107
110 111
115 116
106
105
118
117
1
3
2
4
3 4
2
1
AA00
MASS AIRFLOW SENSOR CIRCUIT
87
88
ENGINE
CONTROL
MODULE
MASS AIRFLOW SENSOR
3
2
HEAT
SENSITIZING
RESISTANCE
BLUE
A-07
(MU805110)
BLA
CK-WHITE
4
20A
WHITE
WHITE
WHITE
A-33X
MFI
RELAY
RELAY BOX
(ENGINE COMPARTMENT)
4
3
1
2
22
TO ECM
B-11
36
FUSIBLE LINK
OFF
ON
MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>
13Ab-115
DIAGNOSTIC TROUBLE CODE PROCEDURES
ZK603589
MFI relay
A-33X
Connector: A-33X
AA00
ZK603596
Mass airflow
sensor
AA00
A-07 (GR)
Connector: A-07
ZK603592
ECM
B-11 (GR)
Connector: B-11
AA00
CIRCUIT OPERATION
⦆
The mass airflow sensor power is supplied from the
MFI relay (terminal No. 4), and the ground is
provided on the ECM (terminal No. 88).
⦆
A voltage that is according to the mass airflow rate
is sent to the ECM (terminal No. 87) from the mass
airflow sensor output terminal (terminal No. 3).
TECHNICAL DESCRIPTION
⦆
While the engine is running, the mass airflow sensor
outputs voltage which corresponds to the mass
airflow rate.
⦆
The ECM checks whether the voltage output by the
mass airflow sensor while the engine is running is
within a specified range.
DESCRIPTIONS OF MONITOR METHODS
Mass airflow sensor output voltage is out of
specified 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
13Ab-116
MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>
DIAGNOSTIC TROUBLE CODE PROCEDURES
DTC SET CONDITIONS
Logic Flow Chart
End
Malfunction
Yes
Yes
Yes
No
No
No
Continuous
failure for 2secs
Output voltage
< 0.2V
Output voltage
> 4.9V
Monitoring
conditions
Good
Start
ZK603676 AA00
Yes
No
Check Conditions
⦆
3 seconds or more have passed since the ignition
switch was turned to "ON" position.
Judgement Criterion
⦆
Mass airflow sensor output voltage has continued
to be 0.2 volt or lower for 2 seconds.
OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function - OBD-II Drive Cycle -
Pattern 24 P.13Ab-8.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are: )
⦆
Mass airflow sensor failed.
⦆
Connector damage
⦆
Harness damage
⦆
ECM failed.
MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>
13Ab-117
DIAGNOSTIC TROUBLE CODE PROCEDURES
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 10:
Mass Airflow 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)
Start the engine and run at idle.
(3)
Set scan tool MB991958 to the data reading mode for item
10, Mass Airflow Sensor.
(4)
Warm up the engine to normal operating temperature: 80°C
to 95°C (176°F to 203°F).
⦆
The standard value during idling should be between 1,350
and 1,670 millivolts.
⦆
When the engine is revved, the mass airflow rate should
increase according to the increase in engine speed.
(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 A-07 at the mass airflow
sensor and harness connector B-11 at the 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 6.
STEP 3. Measure the power supply voltage at the mass
airflow sensor harness side connector A-07.
(1)
Disconnect the connector A-07 and measure at the harness
side.
(2)
Turn the ignition switch to the "ON" position.
13Ab-118
MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>
DIAGNOSTIC TROUBLE CODE PROCEDURES
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