Mitsubishi Montero (2002-2004). Manual — part 108
AUTO A/C DIAGNOSIS
TSB Revision
AUTOMATIC AIR CONDITIONING
55B-125
STEP 11. Check A/C-ECU connector D-24 for damage.
Q: Is A/C-ECU connector in good condition?
YES : Go to Step 12.
NO : Repair or replace the connector. Refer to GROUP
00E, Harness Connector Inspection
that the air conditioning works normally.
STEP 12. Check the wiring harness between A/C-ECU
connector D-24 (terminal 36) and the ground.
NOTE: Also check joint connector (8) connector D-30. If joint
connector (8) connector D-30 is damaged, repair or replace the
connector as described in GROUP 00E, Harness Connector
Inspection
.
Q: Is the wiring harness between A/C-ECU connector D-24
(terminal 36) and the ground in good condition?
YES : Go to Step 13.
NO : Repair the wiring harness. Check that the air
conditioning works normally.
STEP 13. Check the flexible flat cable (FFC).
(1) The FFC is connected to the automatic air conditioning
control panel assembly. Check that the FFC connection is
not contaminated with foreign material or is not loose.
(Refer to
.)
(2) There should be continuity across the FFC terminals.
Q: Is the FFC normal?
YES : Replace the A/C-ECU. (Refer to
.) Check
that the air conditioning works normally.
NO : Repair the FFC. (Refer to
.) Check that the
air conditioning works normally.
AC204170
CONNECTOR : D-24
D-24(B)
D-24(B)
CQ
22
23
30
31
25
26
33
34
32
24
28
3635
27
29
21
HARNESS
SIDE
AC204188
CONNECTOR : D-24, D-30
D-24(B)
D-24(B)
CP
22
23
30
31
25
26
33
34
32
24
28
3635
27
29
21
HARNESS SIDE
9 10
8
6 7
31 32
30
29
18 19 20 21
5
4
2
1
3
27
26
24
23
25
12 13 14 15 16 17
28
11
22
33
D-30
D-30
AC205264AB
AUTO A/C DIAGNOSIS
TSB Revision
AUTOMATIC AIR CONDITIONING
55B-126
INSPECTION PROCEDURE 11: The A/C Indicator Flashes.
.
Lock Sensor Circuit
AC204169
CONNECTOR : B-30
AF
B-30(B)
AC204170
CONNECTORS : D-23, D-24
DV
D-24(B)
D-23(B)
AC204176 BM
CONNECTOR : E-111
AUTO A/C DIAGNOSIS
TSB Revision
AUTOMATIC AIR CONDITIONING
55B-127
TECHNICAL DESCRIPTION (COMMENT)
The lock sensor, which are attached to the air condi-
tioning compressor, and its related components may
be defective if the A/C indicator flashes.
.
TROUBLESHOOTING HINTS
• Malformation of the lock sensor
• Malformation of the A/C-ECU
• Damaged harness wires or connectors
DIAGNOSIS
Required Special Tool:
• MB991223: Test Harness Set
STEP 1. Check A/C-ECU connector D-23, D-24 and A/C
compressor connector B-30 for damage.
Q: Is A/C-ECU connector D-23, D-24 and A/C compressor
connector B-30 in good condition?
YES : Go to Step 2.
NO : Repair or replace the connector. Refer to GROUP
00E, Harness Connector Inspection
that the air conditioning works normally.
AC204169
CONNECTOR : B-30
AE
B-30(B)
B-30(B)
2
3
1
HARNESS
SIDE
AC204188
CONNECTORS : D-23, D-24
D-24(B)
D-24(B)
D-23(B)
D-23(B)
HARNESS SIDE
HARNESS SIDE
BH
22
30 29
21
23
31
25
26
33
34
32
24
28
3635
27
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-128
STEP 2. Check the wiring harness between A/C-ECU
connector D-23 (terminal 9), D-24 (terminal 29) and A/C
compressor connector B-30 (terminal 1, 2).
NOTE: Also check intermediate connector E-111. If intermedi-
ate connector E-111 is damaged, repair or replace the connec-
tor as described in GROUP 00E, Harness Connector
Inspection
.
Q: Is the wiring harness between A/C-ECU connector D-23
(terminal 9), D-24 (terminal 29) and A/C compressor
connector B-30 (terminal 1, 2) in good condition?
YES : Go to Step 3.
NO : Repair the wiring harness. Check that the air
conditioning works normally.
AC204169
CONNECTOR : B-30
AE
B-30(B)
B-30(B)
2
3
1
HARNESS
SIDE
AC204188
CONNECTORS : D-23, D-24
D-24(B)
D-24(B)
D-23(B)
D-23(B)
HARNESS SIDE
HARNESS SIDE
BH
22
30 29
21
23
31
25
26
33
34
32
24
28
3635
27
1
3
4
2
12
1413
11
6
7
8
10 9
18
19
20
16
17
5
15
AC204176
CONNECTOR : E-111
BF
15
4
14
37
36
26 27
12
11
35
34
23 24
3
13
25
9
2
8
32
20 21
6
5
17
29
30
18
1
7
19
31
10
22
33
16
28
38
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