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
.
.
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
NO
NO
NO
YES
YES
YES
MALFUNCTION
GOOD
NO
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
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
3
4
5
1
2
6
7
CONNECTOR: A-01
A-01(B)
AB
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
. Then go to Step 12.
STEP 4. 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
NO : Replace the PCM. Then go to Step 12.
AK103913
3
4
5
1
2
6
7
CONNECTOR: A-01
A-01(B)
AB
HARNESS
CONNECTOR:
COMPONENT SIDE
AK103762
42
43
48
49
50
51
52
53
54
55
56
57
46 45 44
58
59
60
61
62
63
64
65
66
47
41
AB
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
. Then go to Step 12.
AK103913
3
4
5
1
2
6
7
CONNECTOR: A-01
A-01(B)
AB
HARNESS
CONNECTOR:
COMPONENT SIDE
AKX01521AI
A-01 HARNESS
CONNECTOR:
HARNESS SIDE
1 2 3 4 5 6 7
AK103762
42
43
48
49
50
51
52
53
54
55
56
57
46 45 44
58
59
60
61
62
63
64
65
66
47
41
AB
CONNECTOR: C-90
C-90(GR)
HARNESS CONNECTOR:
COMPONENT SIDE
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