Mitsubishi Galant (2004+). Manual — part 822
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-105
DTC SET CONDITIONS
Logic Flow Chart
.
Check Conditions
• Engine coolant temperature is higher than 76°C
(169
°F).
• Repeat 5 or more times: drive
*1
, stop
*2
.
Drive
*1
: vehicle speed higher than 50 km/h (31
mph) lasting a total of more than 60 seconds.
Stop
*2
: vehicle speed lower than 1.5 km/h (1.0
mph) lasting more than 30 seconds.
Judgement Criteria
• Changes in the intake air temperature is lower
than 1
°C (1.8°F).
.
OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function
− OBD-II Drive Cycle −
Procedure 6
.
.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are:)
• Intake air temperature sensor failed.
• Open intake air temperature sensor circuit, har-
ness damage or connector damage.
• PCM failed.
END
MALFUNCTION
YES
YES
NO
NO
YES
NO
GO/STOP OPERATION
FOR SPECIFIED TIMES
INTAKE AIR TEMP.
CHANGES
MONITORING
CONDITIONS
GOOD
START
AK302012
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-106
DIAGNOSIS
Required Special Tools:
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991910: Main Harness A
STEP 1. Using scan tool MB991958, check data list item 13:
Intake Air Temperature 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) Remove the mass airflow sensor from the air intake hose.
(3) Turn the ignition switch to the "ON" position.
(4) Set scan tool MB991958 to the data reading mode for item
13, Intake Air Temperature Sensor.
(5) Heating the sensor using a hair drier.
• The indicated temperature increases.
NOTE: Do not allow it to increase over 80
°
C (176
°
F).
(6) Turn the ignition switch to the "LOCK" (OFF) position.
(7) Attach the mass airflow sensor.
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
NO : Go to Step 2.
AK303804AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
AK302200 AB
INTAKE AIR
TEMPERATURE
SENSOR
MASS AIRFLOW
SENSOR
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-107
STEP 2. Check the intake air temperature sensor.
(1) Disconnect the intake air temperature sensor connector
B-10.
(2) Measure the resistance between intake air temperature
sensor side connector terminal No. 1 and No. 4.
(3) Measure resistance while heating the sensor using a hair
drier.
Standard value:
13
− 17 kΩ [at −20°C (−4°F)]
5.3
− 6.7 kΩ [at 0°C (32°F)]
2.3
− 3.0 kΩ [at 20°C (68°F)]
1.0
− 1.5 kΩ [at 40°C (104°F)]
0.56
− 0.76 kΩ [at 60°C (140°F)]
0.30
− 0.45 kΩ [at 80°C (176°F)]
Q: Is the measured resistance at the standard value?
YES : Go to Step 3.
NO : Replace the mass airflow sensor. Then go to Step 9.
STEP 3. Check harness connector B-10 at the intake air
temperature sensor for damage.
Q: Is the harness connector in good condition?
YES : Go to Step 4.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 9.
AK303805
2
1
3
4
AB
CONNECTOR: B-10
B-10 (GR)
HARNESS CONNECTOR:
COMPONENT SIDE
1
2
3 4
AK203041
INTAKE AIR TEMPERATURE
SENSOR CONNECTOR
AB
AK203040 AB
INTAKE AIR
TEMPERATURE
SENSOR
MASS AIRFLOW
SENSOR
AK303805
2
1
3
4
AB
CONNECTOR: B-10
B-10 (GR)
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-108
STEP 4. Check the continuity at intake air temperature
sensor harness side connector B-10.
(1) Disconnect the connector B-10 and measure at the harness
side.
(2) Check for the continuity between terminal No. 4 and
ground.
• Should be less than 2 ohms.
Q: Does continuity exist?
YES : Go to Step 7.
NO : Go to Step 5.
STEP 5. Check harness connector B-21 at PCM for
damage.
Q: Is the harness connector in good condition?
YES : Go to Step 6.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 9.
AK303805
2
1
3
4
AB
CONNECTOR: B-10
B-10 (GR)
HARNESS CONNECTOR:
COMPONENT SIDE
2
1
3
4
AK203028
B-10 HARNESS
CONNECTOR:
COMPONENT SIDE
AC
AK303018
55
56
54 53 52 51
57
62 61 60 59 58
63
69 68 67 66 65 64
70
75 74 73 72 71
76
82 81 80 79 78 77
83
CONNECTOR: B-21
PCM
AB
HARNESS CONNECTOR:
COMPONENT SIDE
AIR CLEANER
B-21 (B)
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст