Mitsubishi Montero (2004+). Manual — part 322
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-775
STEP 10. Check for harness damage between accelerator
pedal position sensor connector D-138 (terminal No. 6) and
PCM connector D-135 (terminal No. 107)
Q: Is the harness wire in good condition?
YES : Go to Step 11.
NO : Repair it. Then go to Step 12.
STEP 11. Using scan tool MB991958, check data list item
77: 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 77, Accelerator Pedal Position Sensor (sub).
• Output voltage is between 0.905 and 1.165 volts when
foot is released from accelerator pedal.
• Output voltage is 4.035 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 : 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.
AK200945
3
4
5
1
2
8
6
7
AB
CONNECTOR: D-138
HARNESS
CONNECTOR:
COMPONENT SIDE
D-138(GR)
AK200947
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
CONNECTOR: D-135
HARNESS CONNECTOR:
COMPONENT SIDE
AB
PCM
D-135(GR)
AK302970
AB
MB991911
MB991824
MB991827
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-776
STEP 12. 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) After the DTC has been deleted, read the DTC again.
(4) Turn the ignition switch to the "LOCK"(OFF) position.
Q: Is DTC P2127 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
AK302970
AB
MB991911
MB991824
MB991827
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-777
DTC P2128: Accelerator Pedal Position Sensor (Sub) Circuit High Input
.
CIRCUIT OPERATION
• A 5-volt power supply is applied on the APS (sub)
power terminal (terminal No. 8) from the PCM
(terminal No. 97).
The ground terminal (terminal No. 7) is grounded
with PCM (terminal No. 96).
• When the accelerator pedal is moved from the
idle position to the fully opened position, the
resistance between the APS (sub) output termi-
nal (terminal No. 6) and ground terminal (terminal
No. 7) will increase according to the rotation.
.
TECHNICAL DESCRIPTION
• The APS (sub) outputs voltage which corre-
sponds to the accelerator pedal depression.
AK201164
GREEN-YELLO
W
GREEN-ORANGE
BLA
CK
5 V
97
8
ACCELERATOR
PEDAL
POSITION
SENSOR
(SUB)
POWERTRAIN CONTROL MODULE (PCM)
107
96
6
7
Accelerator Pedal Position Sensor (Sub) Circuit
9192
939495
96979899
100
105
113114
115116117
118119120
106
107108109
110111112
101102103
104
D-135
(MU803805)
D-138
(MU802073)
6 7 8
1 2 3 4 5
AK200944
ACCELERATOR
PEDAL
POSITION
SENSOR
AB
D-138(GR)
CONNECTOR: D-138
AK201038AF
CONNECTOR: D-135
PCM
D-135(GR)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
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MULTIPORT FUEL INJECTION (MFI)
13A-778
• The PCM 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 Conditions
• Ignition switch "ON" position.
Judgement Criteria
• Accelerator pedal position sensor (sub) output
voltage is 4.5 volts or higher for 1 second.
.
OBD-II DRIVE CYCLE PATTERN
None.
.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are:)
• APS failed.
• Open APS (sub) circuit, or connector damage.
• PCM failed.
START
END
NO
NO
YES
YES
YES
NO
MALFUNCTION
GOOD
CONTINUOUS
FAILURE FOR 1sec
OUTPUT VOLTAGE > =4.5V
MONITORING
CONDITIONS
AK302962
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