Mitsubishi L200. Manual — part 853
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55A-28
STEP 6. Check the wiring harness between C-06
blower switch connector (terminals 2, 1 and 4)
and C-23 A/C temperature control resistor
connector (terminals 4, 3 and 2).
AC509611BF
Harness side
C-06
C-23
Harness side
C-06
Connectors: C-06, C-23 <LHD>
C-23
AC509932BL
Harness side
C-06
C-23
Harness side
C-06
C-23
Connectors: C-06, C-23 <RHD>
• Check the blower switch output line for open cir-
cuit.
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Repair the wiring harness.
STEP 7. Connector check: C-28 blower motor
connector
AC509613AS
Harness side
Connector: C-28 <LHD>
AC509930AR
Harness side
Connector: C-28 <RHD>
Q: Is the check result normal?
YES :
Go to Step 8.
NO :
Repair the connector.
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55A-29
STEP 8. Check the wiring harness between C-28
blower motor connector terminal No.1 and C-23
A/C temperature control resistor connector
terminal No.1.
AC509611BE
Connector: C-23 <LHD>
Harness side
AC509932 BK
Harness side
Connector: C-23 <RHD>
AC509613AS
Harness side
Connector: C-28 <LHD>
AC509930AR
Harness side
Connector: C-28 <RHD>
• Check the blower motor power supply line for
open circuit.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00, How to
Cope with Intermittent Malfunction ).
NO :
Repair the wiring harness.
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55A-30
Inspection Procedure 4: The A/C compressor and clutch assembly does not work
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 SI : Silver
A/C Compressor and Clutch Assembly Circuit
IGNITION
SWITCH (IG2)
RELAY
BOX
A/C COMPRESSOR
RELAY
A/C
COMPRESSOR
AND CLUTCH
ASSEMBLY
ENGINE-ECU
FUSIBLE
LINK
20
A/C
COMPRESSOR
CLUTCH ASSEMBLY
COMMENTS ON TROUBLE SYMPTOM
If the power is not supplied to the A/C compressor
and clutch assembly, the A/C compressor and clutch
assembly circuits may be defective..
PROBABLE CAUSES
• Malfunction of A/C compressor and clutch
assembly
• Malfunction of A/C compressor relay
• Damaged harness wires and connectors
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55A-31
DIAGNOSIS PROCEDURE
STEP 1. Connector check: A-33 A/C compressor
and clutch assembly connector C-105 engine-
ECU
AC509975AT
Harness side
Connector: A-33
A-33 (B)
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
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the connector.
STEP 2. Voltage measurement at A-33 A/C
compressor and clutch assembly connector.
AC509975AT
Harness side
Connector: A-33
A-33 (B)
(1) Disconnect the connector, and measure at the
wiring harness side.
(2) Turn the ignition switch to the "ON" position.
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
ACA00423
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
Connector C-105
(Harness side)
AB
(3) Disconnect engine-ECU connector C-105 and
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