Mitsubishi Montero Sport (2004+). Manual — part 638
AUTOMATIC TRANSMISSION DIAGNOSIS
TSB Revision
AUTOMATIC TRANSMISSION
23A-117
STEP 5. Check stoplight switch connector C-66, junction
block connector D-02 and D-09 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 6.
NO : Repair or replace the damaged components. Refer to
GROUP 00E, Harness Connector Inspection
STEP 6. Check the harness for damage between stoplight
switch connector C-66 terminal 2 and the power supply
fuse.
Q: Is the harness wire in good condition?
YES : Go to Step 7.
NO : Repair or replace the harness wire.
AC309389
CONNECTOR: C-66
C-66 (B)
AB
1
3 4
2
AC202390
JUNCTION BLOCK (FRONT)
1
D-02 (GR)
AB
CONNECTOR: D-02
AC202391
JUNCTION BLOCK (REAR)
7 8
2
3
6
5
1
4
CONNECTOR: D-09
D-09
AB
AC309389
CONNECTOR: C-66
C-66 (B)
AB
1
3 4
2
AUTOMATIC TRANSMISSION DIAGNOSIS
TSB Revision
AUTOMATIC TRANSMISSION
23A-118
STEP 7. Measure the stoplight switch output voltage to the
PCM at connector C-66 by backprobing.
(1) Remove the stoplight switch from the mounting bracket.
(2) Do not disconnect connector C-66.
(3) Measure the voltage between stoplight switch connector
C-66 terminal 3 and ground by backprobing.
• When the switch button is out (closed circuit), voltage
should equal battery positive voltage.
• When the switch button is depressed (open circuit), volt-
age should measure less than 1.0 volt.
Q: Is the measured voltage battery positive voltage with
the switch button released (closed circuit), and less
than 1.0 volt with the switch button depressed (open
circuit)?
YES : Go to Step 9.
NO : Go to Step 8.
STEP 8. Check the stoplight switch.
Refer to GROUP 35A, On-vehicle Service
− Stoplight Switch
Check
Q: Does the stoplight switch pass the checks?
YES : Go to Step 9.
NO : Replace the stoplight switch. Refer to GROUP 35A,
Brake Pedal
AC309389
CONNECTOR: C-66
C-66 (B)
AB
1
3 4
2
AC203805
1
2
2
4
1
3
AC
C-66 HARNESS CONNECTOR:
HARNESS SIDE
ACX02208
BRAKE PEDAL
STOPLIGHT
SWITCH
AD
AUTOMATIC TRANSMISSION DIAGNOSIS
TSB Revision
AUTOMATIC TRANSMISSION
23A-119
STEP 9. Measure the stoplight switch output voltage at
PCM connector C-92 by backprobing.
(1) Install the stoplight switch into the mounting bracket if it was
removed.
(2) Do not disconnect connector C-92.
(3) Measure the voltage between terminal 123 and ground by
backprobing.
• When the brake pedal is depressed, voltage should
measure battery positive voltage.
• When the brake pedal is not depressed, voltage should
measure less than 1.0 volt.
Q: Is the measured voltage battery positive voltage with
the brake pedal depressed (closed circuit), and less
than 1.0 volt with the brake pedal released (open
circuit)?
YES : Go to Step 12.
NO : Go to Step 10.
AC202317
PCM
120
107
119
106
129 130
118
105
117
114115116
126127128
104
111
103
112
108
101102
109110
121122123
124
113
125
CONNECTOR: C-92
C-92 (GR)
AB
AC001812
C-92 HARNESS CONNECTOR:
HARNESS SIDE
AJ
AUTOMATIC TRANSMISSION DIAGNOSIS
TSB Revision
AUTOMATIC TRANSMISSION
23A-120
STEP 10. Check intermediate connector C-85 and PCM
connector C-92 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 11.
NO : Repair or replace the damaged components. Refer to
GROUP 00E, Harness Connector Inspection
AC202389
11
4
3
9
8
10
5 6
2
1
7
CONNECTOR: C-85
C-85
AB
AC202317
PCM
120
107
119
106
129 130
118
105
117
114115116
126127128
104
111
103
112
108
101102
109110
121122123
124
113
125
CONNECTOR: C-92
C-92 (GR)
AB
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