Mitsubishi Montero (2004+). Manual — part 315
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-747
STEP 4. Measure the sensor supply voltage at accelerator
pedal position sensor harness side connector D-138.
(1) Disconnect the connector D-138 and measure at the
harness side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal No. 2 and ground.
• 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 8.
NO : Go to Step 5.
STEP 5. Check connector D-135 at PCM for damage.
Q: Is the 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 12.
AK200945
3
4
5
1
2
8
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AB
CONNECTOR: D-138
HARNESS
CONNECTOR:
COMPONENT SIDE
D-138(GR)
3
4
5
1
2
8
6
7
AK201454
B-138 HARNESS
CONNECTOR:
COMPONENT SIDE
AB
AK200947
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92
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CONNECTOR: D-135
HARNESS CONNECTOR:
COMPONENT SIDE
AB
PCM
D-135(GR)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-748
STEP 6. Check for open circuit and short circuit to ground
between accelerator pedal position sensor connector
D-138 (terminal No. 2) and PCM connector D-135 (terminal
No. 92).
Q: Is the harness wire in good condition?
YES : Go to Step 7.
NO : Repair it. 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
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CONNECTOR: D-135
HARNESS CONNECTOR:
COMPONENT SIDE
AB
PCM
D-135(GR)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-749
STEP 7. Using scan tool MB991958, check data list item 78:
Accelerator Pedal Position Sensor (main).
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
78, Accelerator Pedal Position Sensor (main).
• 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.
STEP 8. Check connector D-135 at PCM for damage.
Q: Is the connector in good condition?
YES : Go to Step 9.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 12.
AK302970
AB
MB991911
MB991824
MB991827
AK200947
91
92
93
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119
120
CONNECTOR: D-135
HARNESS CONNECTOR:
COMPONENT SIDE
AB
PCM
D-135(GR)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-750
STEP 9. Check for harness damage between accelerator
pedal position sensor connector D-138 (terminal No. 2) and
PCM connector D-135 (terminal No. 92).
Q: Is the harness wire in good condition?
YES : Go to Step 10.
NO : Repair it. 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
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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)
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