Mitsubishi L200. Manual — part 875
TROUBLESHOOTING
AUTOMATIC AIR CONDITIONER
55B-29
STEP 11. Check the wiring harness between C-
105 engine-ECU connector terminal No.8 and A-
38 dual pressure switch connector terminal No.1.
AC509977AG
Harness side
A-38 (BR)
Connector: A-38
AC509613 CD
Harness side
C-105 (B)
Connector: C-105 <LHD>
35
40
41
42
1817
38
39
15
16
14
3736
12
13
11
32
8
3433
9
10
30
31
7 6
29
5
4
28
3
27
2
26
1
25
19
43
2120
22
23
46
47
4544
24
48
76
52
86
62
63
64
65
66
67
68
69
70
71
72
92
95
96
93
94
89
90
91
8887
53
54
55
56
57
58
59
60
61
83
8584
8281
78
79
80
77
49
50
51
74
75
73
AC509930 CA
C-105 (B)
Connector: C-105 <RHD>
Harness side
35
40
41
42
1817
38
39
15
16
14
3736
12
13
11
32
8
3433
9
10
30
31
7 6
29
5
4
28
3
27
2
26
1
25
19
43
2120
22
23
46
47
4544
24
48
76
52
86
62
63
64
65
66
67
68
69
70
71
72
92
95
96
93
94
89
90
91
8887
53
54
55
56
57
58
59
60
61
83
8584
8281
78
79
80
77
49
50
51
74
75
73
NOTE:
AC509975AH
Connector: A-28
A-28 (B)
Prior to the wiring harness inspection, check interme-
diate connector A-28, and repair if necessary.
• Check the input line for open circuit.
Q: Is the check result normal?
YES :
Go to Step 12.
NO :
Repair the wiring harness.
TROUBLESHOOTING
AUTOMATIC AIR CONDITIONER
55B-30
STEP 12. Check the wiring harness between C-
105 engine-ECU connector terminal No.13 and C-
43 A/C-ECU connector terminal No.16.
AC509977AG
Harness side
A-38 (BR)
Connector: A-38
AC509613
Connectors: C-53, C-105 <LHD>
CF
Harness side
C-105 (B)
35
40
41
42
1817
38
39
15
16
14
3736
12
13
11
32
8
3433
9
10
30
31
7 6
29
5
4
28
3
27
2
26
1
25
19
43
2120
22
23
46
47
4544
24
48
76
52
86
62
63
64
65
66
67
68
69
70
71
72
92
95
96
93
94
89
90
91
8887
53
54
55
56
57
58
59
60
61
83
8584
8281
78
79
80
77
49
50
51
74
75
73
C-53
C-53
Harness side
C-105
AC509930 CD
C-105 (B)
Connectors: C-35, C-105 <RHD>
Harness side
35
40
41
42
1817
38
39
15
16
14
3736
12
13
11
32
8
3433
9
10
30
31
7 6
29
5
4
28
3
27
2
26
1
25
19
43
2120
22
23
46
47
4544
24
48
76
52
86
62
63
64
65
66
67
68
69
70
71
72
92
95
96
93
94
89
90
91
8887
53
54
55
56
57
58
59
60
61
83
8584
8281
78
79
80
77
49
50
51
74
75
73
C-35
Harness side
C-105
C-53
AC509611AR
Connector: C-43 <LHD>
Harness side
AC509932AS
Harness side
Connector: C-43 <RHD>
TROUBLESHOOTING
AUTOMATIC AIR CONDITIONER
55B-31
NOTE: Prior to the wiring harness inspection, check
intermediate connector C-53 <LHD> or C-35 <RHD>
and repair if necessary.
• Check the input line for open circuit.
Q: Is the check result normal?
YES :
Go to Step 13.
NO :
Repair the wiring harness.
STEP 13. Check the refrigerant level.
Refer to .
Q: Is the refrigerant level correct?
YES :
Go to Step 14.
NO :
Correct the refrigerant level (Refer to On-
vehicle Service .)
STEP 14. Replace the A/C-ECU, and then recheck
the trouble symptom
Check that the compressor works normally.
Q: Is the check result normal?
YES :
This diagnosis is complete.
NO :
Replace the engine-ECU.
TROUBLESHOOTING
AUTOMATIC AIR CONDITIONER
55B-32
Inspection Procedure 2: The blower does not work
Blower Motor Circuit
FUSIBLE
LINK
20
IGNITION
SWITCH (IG2)
BLOWER
RELAY
A/C-ECU
BLOWER
MOTOR
POWER
TRANSISTER
Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Grey R : Red P : Pink V : Violet PU : Purple
AC805774 AB
COMMENTS ON TROUBLE SYMPTOM
If the blower motor does not operate, the blower
motor circuit system may be defective.
POSSIBLE CAUSES
• Malfunction of the blower relay
• Malfunction of the blower motor
• Damaged the wiring harness or connectors
DIAGNOSIS PROCEDURE
STEP 1. Check that the blower motor operates
when the blower speed selection dial is moved to
the "MAX " position.
(1) Turn the ignition switch to the "ON" position.
(2) Turn the blower speed selection dial to the "MAX
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