Mitsubishi Eclipse. Manual — part 581
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-867
DTC P2227: Barometric Pressure Circuit Range/Performance Problem
AK301513
7
4 5 6
1 2 3
GREEN-YELLO
W
GREEN-WHITE
BR
O
W
N
ENGINE CONTROL MODULE (ECM) <M/T>
OR
POWERTRAIN CONTROL MODULE (PCM) <A/T>
5 V
B-14
BAROMETRIC PRESSURE SENSOR
(INCORPORATED IN VOLUME
AIRFLOW SENSOR)
1
2
5
42 <M/T>*1
46 <A/T>*3
51 <M/T>*1
55 <A/T>*3
34 <M/T>*2
16 <A/T>*4
65
43
50
42
49
41
48
60 61
64
46 47
58 59
67 68
45
56
66
52
51
44
53
62
54
63
57
55
C-58 <M/T>
(MU803782)
C-55 <A/T>
(MU803781)
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
Barometric Pressure Sensor Circuit
NOTE
*1: ECM connector C-58 <M/T>
*2: ECM connector C-51 <M/T>
*3: PCM connector C-55 <A/T>
*4: PCM connector C-52< A/T>
C-51 <M/T>, C-52 <A/T>
(MU803784)
2
3 4
5 6
7 8
9
11 12 13 14 15 16 17 18 19 20
30
21 22 23
24 25
26 27 28 29
3132 33
34 35
1
10
AK300053
CONNECTOR: B-14
AC
BAROMETRIC
PRESSURE
SENSOR
B-14 (B)
AK300091
CONNECTORS: C-51, C-58 <M/T>
ECM
AB
C-51 (GR)
C-58 (GR)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-868
.
CIRCUIT OPERATION
• A 5-volt voltage is supplied to the barometric
pressure sensor power terminal (terminal No. 1)
from the ECM (terminal No. 42) <M/T> or PCM
(terminal No. 46) <A/T>. The ground terminal
(terminal No. 5) is grounded with ECM (terminal
No. 34) <M/T> or PCM (terminal No. 16) <A/T>.
• A voltage that is proportional to the atmospheric
pressure is sent to the ECM (terminal No. 51)
<M/T> or PCM (terminal No. 55) <A/T> from the
barometric pressure sensor output terminal (ter-
minal No. 2).
.
TECHNICAL DESCRIPTION
• The barometric pressure sensor outputs a volt-
age which corresponds to the barometric pres-
sure.
• The ECM <M/T> or PCM <A/T> checks whether
this voltage is within a specified range.
.
DESCRIPTIONS OF MONITOR METHODS
Barometric pressure sensor output voltage does not
change for specified period. (approximately 1
week)
.
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
.
AK300244
CONNECTORS: C-52, C-55 <A/T>
AB
PCM
C-52 (GR)
C-55 (GR)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-869
DTC SET CONDITIONS
Logic Flow Chart
.
Check Conditions
• Barometric pressure is lower than 76 kPa (11
psi).
Judgement Criteria
• During 15 times of driving, the changes in the
sensor output voltage should be 0.015 volt
[equivalent to 0.4 kPa (0.12 in.Hg)] or less.
• Make sure that the engine coolant temperature is
72
°C (162°F) or higher during each of the 15
times of driving. Also, during each of the 15 times
of driving, make sure that after the engine has
been started, the engine coolant temperature has
increased for 23
°C (41°F) or higher.
.
OBD-ll DRIVE CYCLE PATTERN
Refer to , Diagnostic Function
− OBD-ll Drive Cycle −
Procedure 6
.
.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are: )
• Barometric pressure sensor failed.
• Open or shorted barometric pressure sensor cir-
cuit harness damage, or connector damage.
• ECM failed. <M/T>
• PCM failed. <A/T>
DIAGNOSIS
Required Special Tools:
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991911: Main Harness B
START
MONITORING
CONDITIONS
CIRCUIT VOLTAGE
MALFUNCTION
CONTINUOUS
FAILURE FOR 2secs
NO
YES
YES
NO
< 6V
END
GOOD
NO
Yes
AK301455
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-870
STEP 1. Using scan tool MB991958, read the diagnostic
trouble code (DTC).
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) Read the DTC.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC P2228 set?
YES : Refer to, DTC P2228
− Barometric Pressure Circuit
Low Input
NO : Go to Step 2.
STEP 2. Check connector B-14 at the barometric pressure
sensor for damage.
Q: Is the connector in good condition?
YES : Go to Step 3.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 9.
AK300810
AB
MB991911
16-PIN
MB991827
MB991824
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