Mitsubishi L200. Manual — part 859
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55A-52
STEP 14. Check the wiring harness between D-10
rear window defogger connector terminal No.1
and earth.
AC509961AF
Harness side
D-10 (B)
Connector: D-10 <Single cab>
AC509965AI
Harness side
Connector: D-10 <Club cab>
D-10 (B)
AC509967AQ
Harness side
D-10 (B)
Connector: D-10 <Double cab>
• Check the rear window defogger earth line for
open or short 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 or replace the wiring harness.
STEP 15. Check the rear window defogger.
Refer to GROUP 54A, Rear Window rear window
defogger Inspection .
Q: Does the rear window defogger work normally?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00, How to
Cope with Intermittent Malfunction ).
NO :
Repair the rear window defogger.
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55A-53
Inspection Procedure 7: The PTC heater does not work <Russia>
PTC Heater Circuit
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
FUSIBLE
LINK
IGNITION
SWITCH (IG2)
PTC
HEATER
RELAY 2
PTC
HEATER
RELAY 1
PTC
HEATER 1
PTC
HEATER 2
ENGINE-
ECU
A/C
SWITCH
MODULE
3
1
4
2
3
1
4
2
ACA00403
25
COMMENTS ON TROUBLE SYMPTOM
When the PTC heater does not work under the fol-
lowing conditions, the heater switch system or the
PTC heater circuit system may be defective.
PTC heater operating conditions
• heater switch: ON
• Air outlet: FOOT/DEF, FOOT, FACE/FOOT
• Temperature control dial: MAX HOT
• Coolant temperature: 80 degrees celsius or less
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55A-54
NOTE: When the coolant temperature becomes
above 80 degrees celsius and PTC heater stops the
operation, the PTC heater does not operate until
coolant temperature becomes below 70 degrees cel-
sius.
PROBABLE CAUSES
• Malfunction of the heater switch system
• Damaged the wiring harness or connectors
• Malfunction of the PTC heater relay 1
• Malfunction of the PTC heater relay 2
• Malfunction of the PTC heater 1
• Malfunction of the PTC heater 2
DIAGNOSIS PROCEDURE
STEP 1. Connector check: C-105 engine-ECU
connector
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
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the connector.
STEP 2. Connector check: C-149 PTC heater 1
connector
AC509613AT
Harness side
Connector: C-149 <LHD>
C-149 (GR)
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Repair the connector.
STEP 3. Resistance measurement at the C-149
PTC heater 1 connector.
AC509613AT
Harness side
Connector: C-149 <LHD>
C-149 (GR)
(1) Disconnect the connector, and measure at the
wiring harness side.
AC310506HU
Connector C-149
(Harness side)
(2) Continuity between terminal 1 and body earth
OK: Continuity (Less than 2
Ω)
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Go to Step 4.
STEP 4. Check the wiring harness between C-149
PTC heater 1 connector terminal No.1 and body
earth.
AC509613AT
Harness side
Connector: C-149 <LHD>
C-149 (GR)
• Check the PTC heater earth 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-55
STEP 5. Resistance measurement at the C-150
PTC heater 2 connector.
AC509613 AU
Harness side
Connector: C-150 <LHD>
C-150 (GR)
(1) Disconnect the connector, and measure at the
wiring harness side.
AC310506HV
Connector C-150
(Harness side)
(2) Continuity between terminal 1 and body earth
OK: Continuity (Less than 2
Ω)
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Go to Step 6.
STEP 6. Check the wiring harness between C-150
PTC heater 2 connector terminal No.1 and body
earth.
AC509613 AU
Harness side
Connector: C-150 <LHD>
C-150 (GR)
• Check the PTC heater earth 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.
STEP 7. Voltage measurement at C-149 PTC
heater 1 connector.
AC509613AT
Harness side
Connector: C-149 <LHD>
C-149 (GR)
(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
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)
AE
(3) Disconnect engine-ECU connector C-105 and
earth terminal 36.
AC310507JD
Connector C-149
(Harness side)
(4) Voltage between terminal 2 and body earth.
OK: System voltage
Q: Is the check result normal?
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст