Mitsubishi Montero (2004+). Manual — part 929
AUTOMATIC TRANSMISSION DIAGNOSIS
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AUTOMATIC TRANSMISSION
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STEP 16. Measure the A/T control relay output voltage at
PCM connector D-136 by backprobing.
(1) Do not disconnect connector D-136.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 123 and ground by
backprobing.
• The measured voltage should equal battery positive
voltage.
(4) Measure the voltage between terminal 124 and ground by
backprobing.
• The measured voltage should equal battery positive
voltage.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage equal to battery positive
voltage between terminal 123 and ground, and between
terminal 124 and ground?
YES : Go to Step 19.
NO : Go to Step 17.
AC204681AD
CONNECTOR: D-136
D-136 (GR)
121 122
123
124
125 126 127 128 129 130
131 132
133
134 135
136 137 138
139 140
141
142 143
144
145
146
AC204918
AC204918 BS
D-136 HARNESS CONNECTOR :
HARNESS SIDE
138
131
132 133
145
140
146
141
139
124
123
142
134
125 126 127 128 129 130
137
144
136
143
135
122
121
AC204918 BT
D-136 HARNESS CONNECTOR :
HARNESS SIDE
138
131
132 133
145
140
146
141
139
124
123
142
134
125 126 127 128 129 130
137
144
136
143
135
122
121
AUTOMATIC TRANSMISSION DIAGNOSIS
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AUTOMATIC TRANSMISSION
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STEP 17. Check PCM connector D-136 for loose, corroded
or damaged terminals, or terminals pushed back in the
connector.
Q: Are the connectors and terminals in good condition?
YES : Go to Step 18.
NO : Repair or replace the damaged components. Refer to
GROUP 00E, Harness Connector Inspection
AC204681AD
CONNECTOR: D-136
D-136 (GR)
121 122
123
124
125 126 127 128 129 130
131 132
133
134 135
136 137 138
139 140
141
142 143
144
145
146
AUTOMATIC TRANSMISSION DIAGNOSIS
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AUTOMATIC TRANSMISSION
23A-293
STEP 18. Check harness for open circuit or short circuit to
ground between A/T control relay connector D-13 terminal
3 and PCM connector D-136 terminals 123, 124.
Q: Is the harness wire in good condition?
YES : Go to Step 19.
NO : Repair or replace the harness wire.
AC204750
CONNECTOR : D-13
AB
PCM
1
3 4
2
AC204681AD
CONNECTOR: D-136
D-136 (GR)
121 122
123
124
125 126 127 128 129 130
131 132
133
134 135
136 137 138
139 140
141
142 143
144
145
146
AUTOMATIC TRANSMISSION DIAGNOSIS
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AUTOMATIC TRANSMISSION
23A-294
STEP 19. Using scan tool MB991958, check data list item
54: A/T control relay output Voltage.
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.
• Item 54: A/T Control Relay Output Voltage.
• The voltage should equal battery positive voltage.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage equal to battery positive
voltage?
YES : 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 Malfunction
.
NO : Replace the PCM.
AC307591 AC
MB991911
MB991824
MB991827
AC307591
DATA LINK
CONNECTOR
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