Mitsubishi Montero (2004+). Manual — part 638
AUTO A/C DIAGNOSIS
TSB Revision
AUTOMATIC AIR CONDITIONING
55B-41
NOTE: Also check intermediate connector D-28, joint connec-
tor (2) A-15, junction block connectors D-210 and D-208. If
intermediate connector D-28, joint connector (2) A-15, junction
block connectors D-210 or D-208 is damaged, repair or replace
the connector as described in GROUP 00E, Harness Connec-
tor Inspection
.
Q: Is the wiring harness between A/C compressor clutch
relay connector A-12X (terminal 3) and the ignition
switch (IG2) in good condition?
YES : Check that the air conditioning works normally.
NO : Repair the wiring harness. Check that the air
conditioning works normally.
AC204167
CONNECTOR : A-15
AD
14
13
4
1112
5
3
10
8 9
2
7
1
6
AC204170
CONNECTOR : D-28
AI
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
AC204191
CONNECTORS: D-208, D-210
D-208
AC
HARNESS SIDE
HARNESS SIDE
D-210
D-208
D-210
1
2
3
5
6
4
1
2
7 6
3
9
4
11
12
10
13
5
8
AUTO A/C DIAGNOSIS
TSB Revision
AUTOMATIC AIR CONDITIONING
55B-42
STEP 12. Measure the voltage at A/C compressor clutch
relay connector A-12X.
(1) Disconnect A/C compressor connector A-12X and measure
the voltage at the relay box side.
(2) Measure the voltage between terminal 5 and ground.
• The measured value should be approximately 12 volts
(battery positive voltage).
Q: Does the measured voltage correspond with this range?
YES : Go to Step 15.
NO : Go to Step 13.
STEP 13. Check A/C compressor clutch relay connector
A-12X for damage.
Q: Is A/C compressor clutch relay connector A-12X in
good condition?
YES : Go to Step 14.
NO : Repair or replace the connector. Refer to GROUP
00E, Harness Connector Inspection
that the air conditioning works normally.
STEP 14. Check the wiring harness between A/C
compressor clutch relay connector A-12X (terminal 5) and
the fusible link (1).
Q: Is the wiring harness between A/C compressor clutch
relay connector A-12X (terminal 5) and the fusible link
(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
AC204738 CW
RELAY BOX SIDE : A-12X
2 1
5
4
3
AC204183
CONNECTOR : A-12X
AP
RELAY BOX
SIDE
2 1
5
4
3
AC204183
CONNECTOR : A-12X
AP
RELAY BOX
SIDE
2 1
5
4
3
AUTO A/C DIAGNOSIS
TSB Revision
AUTOMATIC AIR CONDITIONING
55B-43
STEP 15. Check A/C compressor clutch relay connector
A-12X and A/C compressor connector B-30 for damage.
Q: Is A/C compressor clutch relay connector A-12X and
A/C compressor connector B-30 in good condition?
YES : Go to Step 16.
NO : Repair or replace the connector. Refer to GROUP
00E, Harness Connector Inspection
that the air conditioning works normally.
STEP 16. Check the wiring harness between A/C
compressor clutch relay connector A-12X (terminal 4) and
A/C compressor connector B-30 (terminal 3).
AC204183
CONNECTOR : A-12X
AP
RELAY BOX
SIDE
2 1
5
4
3
AC204169
CONNECTOR : B-30
AE
B-30(B)
B-30(B)
2
3
1
HARNESS
SIDE
AC204183
CONNECTOR : A-12X
AP
RELAY BOX
SIDE
2 1
5
4
3
AC204169
CONNECTOR : B-30
AE
B-30(B)
B-30(B)
2
3
1
HARNESS
SIDE
AUTO A/C DIAGNOSIS
TSB Revision
AUTOMATIC AIR CONDITIONING
55B-44
NOTE: Also check intermediate connector A-05. If intermediate
connector A-05 is damaged, repair or replace the connector as
described in GROUP 00E, Harness Connector Inspection
.
Q: Is the wiring harness between A/C compressor clutch
relay connector A-12X (terminal 4) and A/C compressor
connector B-30 (terminal 3) in good condition?
YES : Go to Step 17.
NO : Repair the wiring harness. Check that the air
conditioning works normally.
STEP 17. Check powertrain control module connector
D-132 and A/C compressor clutch relay connector A-12X
for damage.
Q: Are powertrain control module connector D-132 and
A/C compressor clutch relay connector A-12X in good
condition?
YES : Go to Step 18.
NO : Repair or replace the connector. Refer to GROUP
00E, Harness Connector Inspection
that the air conditioning works normally.
AC204167
CONNECTOR : A-05
BC
A-05(B)
A-05(B)
8
4
7
3
5
1
6
2
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
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