Mitsubishi L200. Manual — part 177
TROUBLESHOOTING
DIESEL FUEL
13A-504
STEP 2. Connectors check: B-05 4LLC switch
connector and C-105 engine-ECU connector
Q: Are the check results normal?
YES :
Go to Step 3 .
NO :
Repair or replace.
STEP 3. check harness between C-105 (terminal
No. 13) engine-ECU connector and B-05 (terminal
No. 1) 4LLC switch connector.
NOTE: Before checking harness, check intermediate
connectors C-29 and A-115, and repair if necessary.
Q: Is the check result normal?
AK801710AB
Harness side
connector
Connector: B-05
B-05
1
AKA00089
1
2
3
4
5
6
7
8
9
10
11
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91
92
93
94
95
96
C-105 (B)
C-105 (B)
<R.H. drive vehicles>
Harness side connector
<L.H. drive vehicles>
Connector: C-105
AB
AK801710AB
Harness side
connector
Connector: B-05
B-05
1
AKA00089
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
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91
92
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95
96
C-105 (B)
C-105 (B)
<R.H. drive vehicles>
Harness side connector
<L.H. drive vehicles>
Connector: C-105
AB
TROUBLESHOOTING
DIESEL FUEL
13A-505
YES :
Replace the engine-ECU. When the engine-
ECU is replaced, write the chassis number
(Refer to GROUP 00
− Precautions Before
Service
− How to Perform Chassis Number
Writing ). After replacing the engine-ECU,
register the injector identification code and
learn fuel injection (Refer to GROUP 00
−
Precautions Before Service
− What The
Common Rail Engine Learns ). After
registering the injector identification code,
the vehicle equipped with the DPF carries
out the forcible DPF regeneration. (Refer to
GROUP 17
− Emission Control − Diesel
Particulate Filter (DPF) System
− Forcible
DPF Regeneration ).
NO :
Repair the harness wire.
TROUBLESHOOTING
DIESEL FUEL
13A-506
Inspection Procedure 21: Condenser Fan Relay System <Vehicles with A/C condenser fan>
OPERATION
• The A/C condenser fan relay is controlled by turn-
ing on and off the power transistor in the engine-
ECU.
• In response to the A/C switch signal, A/C load
signal, vehicle speed and engine coolant temper-
ature, the engine-ECU controls the condenser
fan relay.
PROBABLE CAUSES
• Failed condenser fan relay
• Failed condenser fan motor
• Damaged harness (Open or short circuit between
engine-ECU and condenser fan relay, Open cir-
cuit between condenser fan motor and earth,
condenser fan relay and J/B, condenser fan relay
and relay box, and open circuit between con-
denser fan relay and condenser fan motor)
AKB00293
1
2
3
4
M
1 2
1
2
3
4
5 6 7 8 9
10 1112 13 14 15 16 17 18 19 20 21 22 23 24
25 26
27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42
49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72
43 44 45 46 47 48
73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96
1 2 3
4 5 6
Fusible link 20
IG2
ST
LOCK
ACC
IG1
Ignition switch
4
Condenser Fan Relay Circuit
C-307
R
W
16
7.5A
5
20A
L-R
L-R
L-B
A-120
MU802601
A/C condenser
fan motor
B
C-207
C-210
J/B
Relay
box
1
4
2
21
1
A-115
LG-R
LG-R
Engine-ECU
C-105
3
2
1
9
6
Condenser fan relay
A-14X
OFF
ON
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
AB
B
TROUBLESHOOTING
DIESEL FUEL
13A-507
• Damaged connector (condenser fan relay con-
nector, condenser fan motor connector, Engine-
ECU connector)
• Failed engine-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III data list
• Refer to Data List Reference Table
.
a. Item 26: A/C load signal
Q: Is the check result normal?
YES :
Go to Step 2 .
NO :
Check A/C system (Refer to GROUP 55A
−
Troubleshooting
− Check Chart for Trouble
Symptoms <Manual A/C>, GROUP 55B
−
Troubleshooting
− Trouble Symptom Chart
<Automatic A/C>).
STEP 2. Check at C-105 engine-ECU connector.
• Disconnect connector, and measure at harness
side.
• Ignition switch: ON
• Short-circuit terminal No. 21 to earth.
OK: Condenser fan motor rotates
Q: Is the check result normal?
YES :
Go to Step 3 .
NO :
Check condenser fan system (Refer to
GROUP 55A
− Troubleshooting − Trouble
Symptom Chart <Manual A/C>, GROUP
55B
− Troubleshooting − Trouble Symptom
Chart <Automatic A/C>).
STEP 3. Connector check: C-105 engine-ECU
connector.
Q: Is the check result normal?
YES :
Replace the engine-ECU. When the engine-
ECU is replaced, write the chassis number
(Refer to GROUP 00
− Precautions Before
Service
− How to Perform Chassis Number
Writing ). After replacing the engine-ECU,
register the injector identification code and
learn fuel injection (Refer to GROUP 00
−
Precautions Before Service
− What The
Common Rail Engine Learns ). After
registering the injector identification code,
the vehicle equipped with the DPF carries
out the forcible DPF regeneration. (Refer to
GROUP 17
− Emission Control − Diesel
Particulate Filter (DPF) System
− Forcible
DPF Regeneration ).
NO :
Repair or replace.
AKA00089
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
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72
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48
73
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76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
C-105 (B)
C-105 (B)
<R.H. drive vehicles>
Harness side connector
<L.H. drive vehicles>
Connector: C-105
AB
AKA00089
1
2
3
4
5
6
7
8
9
10
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85
86
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89
90
91
92
93
94
95
96
C-105 (B)
C-105 (B)
<R.H. drive vehicles>
Harness side connector
<L.H. drive vehicles>
Connector: C-105
AB
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