Mitsubishi Outlander GS45X. Manual — part 937
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-681
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. Check harness connector C-123 at accelerator
pedal position sensor and harness connector B-11 at ECM
for damage.
Q: Is the harness connector in good condition?
YES : Go to Step 2.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 4.
STEP 2. Check for open circuit or short circuit to ground or
harness damage between accelerator pedal position
sensor connector C-123 and ECM connector B-11.
(1) Disconnect the connector C-123 and B-11 measure at the
harness side.
(2) Measure the resistance between connector C-123 and
connector B-11.
a. Connector C-123 (terminal No. 4) and connector B-11
(terminal No. 78).
b. Connector C-123 (terminal No. 6) and connector B-11
(terminal No. 77).
• Should be less than 2 ohms.
(3) Check for the continuity between connector C-123 and
ground.
a. Connector C-123 (terminal No. 4) and ground.
b. Connector C-123 (terminal No. 6) and ground.
• Not continuity.
Q: Is the harness wire in good condition?
YES : Go to Step 3.
NO : Repair it. Then go to Step 4.
AK703901
82 81 80 79 78 77 76 75 74 73 72 71
94 93 92 91 90 89 88 87 86 85 84 83
99 98 97 96 95
100
101
102
103
104
105
106
112
113
114
109 108
107
110
111
115
116
117
118
1
6 5 4 3 2
AB
C-123 harness connector:
component side
B-11 harness
connector:
component side
AK700283
1
6 5 4 3 2
AB
C-123 harness
connector:
component side
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-682
STEP 3. Using scan tool MB991958, check data list item 12:
Accelerator Pedal Position Sensor (sub).
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
12, Accelerator Pedal Position Sensor (sub).
• Output voltage is between 0.4 and 0.6 volts when foot is
released from accelerator pedal.
• Output voltage is 2.0 volts or higher when accelerator
pedal is fully depressed.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?
YES : Go to Step 4.
NO : Replace the accelerator pedal position sensor. Then
go to Step 4.
STEP 4. Using scan tool MB991958, read the diagnostic
trouble code (DTC).
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Read the DTC again.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC P2127 set?
YES : Replace the ECM. When the ECM is replaced,
register the ID code. Refer to GROUP 42B, Diagnosis
− ID Codes Registration Judgment Table <Vehicles
or GROUP 42C, Diagnosis
− ID
Codes Registration Judgment Table <Vehicles with
WCM>
NO : 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
.
AK700568AB
MB991824
MB991827
MB991910
Data link
connector
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-683
DTC P2128: Accelerator Pedal Position Sensor (Sub) Circuit High Input
.
CIRCUIT OPERATION
• A 5-volt power supply is applied on the accelera-
tor pedal position sensor (sub) power terminal
(terminal No. 4) from the ECM (terminal No. 78).
• A votage that is according to the accelerator
opening angle is sent to the ECM (terminal No.
77) from the accelerator pedal position sensor
(sub) output terminal (terminal No. 6).
• The ground terminal (terminal No. 5) is grounded
with ECM (terminal No. 79).
.
AK700163
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
6
1 2 3 4 5
AB
5 V
78
4
YELLO
W
-RED
YELLO
W
-BLUE
BLA
CK-WHITE
77
79
6
5
B-11
C-123
HALL IC
5 V
ACCELERATOR PEDAL POSITION SENSOR (SUB) CIRCUIT
ACCELERATOR
PEDAL POSITION
SENSOR (SUB)
ENGINE
CONTROL
MODULE
AK700431
AB
Accelerator pedal
position sensor
C-123 (B)
Connector: C-123
AK700402AB
ECM
B-11 (GR)
Connector: B-11
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-684
TECHNICAL DESCRIPTION
• The accelerator pedal position sensor (sub) out-
puts voltage which corresponds to the accelera-
tor pedal depression.
• The ECM checks whether the voltage is within a
specified range.
.
DESCRIPTIONS OF MONITOR METHODS
Accelerator pedal position sensor (sub) output volt-
age 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
.
DTC SET CONDITIONS
Logic Flow Chart
.
Check Condition
• Ignition switch is "ON" position.
Judgement Criterion
• Accelerator pedal position sensor (sub) output
voltage is 2.5 volts or higher for 0.3 second.
.
OBD-II DRIVE CYCLE PATTERN
None.
.
TROUBLESHOOTING HINTS (The most
likely causes for this code to be set are:)
• Accelerator pedal position sensor failed.
• Connector damage.
• Harness damage.
• ECM failed.
AK604340
Good
Malfunction
End
No
No
Output voltage >= 2.5V
Start
Yes
Yes
Continuous
failure for 0.3sec
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