Mitsubishi Montero (2004+). Manual — part 639
AUTO A/C DIAGNOSIS
TSB Revision
AUTOMATIC AIR CONDITIONING
55B-45
STEP 18. Check the wiring harness between powertrain
control module connector D-132 (terminal 8) and A/C
compressor clutch relay connector A-12X (terminal 1).
NOTE: Also check intermediate connector A-03. If intermediate
connector A-03 is damaged, repair or replace the connector as
described in GROUP 00E, Harness Connector Inspection
.
Q: Is the wiring harness between powertrain control
module connector D-132 (terminal 8) and A/C
compressor clutch relay connector A-12X (terminal 1) in
good condition?
YES : Check that the air conditioning works normally.
NO : Repair the wiring harness. Check that the air
conditioning works normally.
AC204183
CONNECTOR : A-12X
AP
RELAY BOX
SIDE
2 1
5
4
3
AC204171
CONNECTOR : D-132
D-132(GR)
D-132(GR)
AS
HARNESS SIDE
8
23
1110
24
9
6
22
7
16
17
15
3
4
1312
19
20
2726
2
1
5
14
21
25
18
AC204167
CONNECTOR : A-03
AT
A-03 (B)
6
12
5
3 4
2
1
9 10
8
7
11
AUTO A/C DIAGNOSIS
TSB Revision
AUTOMATIC AIR CONDITIONING
55B-46
STEP 19. Check the dual pressure switch operation.
(1) Remove the dual pressure switch connector and connect
the high/low pressure side terminals located on the harness
side as shown in the illustration.
(2) Install a gauge manifold to the high-pressure side service
valve of the refrigerant line (Refer to
(3) When the high/low pressure sides of the dual pressure
switch are at operation pressure (ON) and there is
continuity between the respective terminals, then the
condition is normal.
Q: Is the dual pressure switch operating properly?
YES : Go to Step 20.
NO : Replace the dual pressure switch. Check that the air
conditioning works normally.
STEP 20. Check dual pressure switch connector A-22 and
A/C-ECU connector D-23 for damage.
Q: Are dual pressure switch connector A-22 and A/C-ECU
connector D-23 in good condition?
YES : Go to Step 21.
NO : Repair or replace the connector. Refer to GROUP
00E, Harness Connector Inspection
that the air conditioning works normally.
ITEM
OFF to ON
ON to OFF
Low-pressure side kPa
(psi)
223
± 27 (32.1
± 3.9)
196
± 20 (28.4
± 2.9)
High-pressure side kPa
(psi)
2,550
± 200
(369.9
± 29)
3,140
± 200
(455.5
± 29)
ACX00822
kPa
(psi)
196 ± 20
(28.4 ± 2.9)
223 ± 27
(32.1 ± 3.9)
2,550 ± 200
(369.9 ± 29)
3,140 ± 200
(455.5 ± 29)
DUAL PRESSURE
SWITCH
AE
AC204167
CONNECTOR : A-22
AW
A-22(BR)
A-22(BR)
2 1
HARNESS SIDE
AC204170
CONNECTOR : D-23
D-23(B)
D-23(B)
CP
HARNESS
SIDE
1
3
4
2
12
1413
11
6
7
8
10 9
18
19
20
16
17
5
15
AUTO A/C DIAGNOSIS
TSB Revision
AUTOMATIC AIR CONDITIONING
55B-47
STEP 21. Check the wiring harness between dual pressure
switch connector A-22 (terminal 2) and A/C-ECU connector
D-23 (terminal 5).
NOTE: Also check intermediate connector D-28. If intermediate
connectors D-28 is damaged, repair or replace the connector
as described in GROUP 00E, Harness Connector Inspection
.
Q: Is the wiring harness between dual pressure switch
connector A-22 (terminal 2) and A/C-ECU connector
D-23 (terminal 5) in good condition?
YES : Go to Step 22.
NO : Repair the wiring harness. Check that the air
conditioning works normally.
AC204167
CONNECTOR : A-22
AW
A-22(BR)
A-22(BR)
2 1
HARNESS SIDE
AC204188
CONNECTOR : D-23, D-28
D-23(B)
D-23(B)
CJ
HARNESS SIDE
1
3
4
2
12
1413
11
6
7
8
10 9
18
19
20
16
17
5
15
2 3
27
32
28
33
16
15
4 5
19
18
29
17
34
7 8
35
22
21
9 10
30
36
31
37
25
24
23
6
20
1
14
26
11
13
12
38
D-28
D-28
HARNESS SIDE
AUTO A/C DIAGNOSIS
TSB Revision
AUTOMATIC AIR CONDITIONING
55B-48
STEP 22. Check dual pressure switch connector A-22 and
powertrain control module connector D-134 for damage.
Q: Are dual pressure switch connector A-22 and
powertrain control module connector D-134 in good
condition?
YES : Go to Step 23.
NO : Repair or replace the connector. Refer to GROUP
00E, Harness Connector Inspection
that the air conditioning works normally.
AC204167
CONNECTOR : A-22
AW
A-22(BR)
A-22(BR)
2 1
HARNESS SIDE
AC204171
CONNECTOR: D-134
HARNESS SIDE
D-134(GR)
D-134(GR)
AE
80
87
73
66
67
65
74
81
75
82
6261
72
68
69
70
71
78
85
77
8483
76
79
86
63
64
8988
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