Dtc P0481: Cooling Fan 2 (A/C Condenser Fan) Control Circuit - Suzuki SX4 Service Manual

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Step
7
Radiator cooling fan control check
1) Run engine until ECT is over 100 °C, 212 °F.
2) Measure voltage between vehicle body ground and
"E01-46" terminal of ECM connector.
Is voltage lower than 1.5 V?

DTC P0481: Cooling Fan 2 (A/C Condenser Fan) Control Circuit

Wiring Diagram
GRN
2
WHT
BLU/YEL
1
8
9
15
14
13
12
11
30
29
28
27
26
44
45
43
42
41
59
60
58
57
56
1. Individual circuit fuse box No.1
2. Ignition switch
3. A/C condenser cooling fan relay
4. A/C compressor relay
Circuit Description
A/C condenser cooling fan motor is turned ON and OFF by its relay which ECM controls. A/C condenser cooling fan
motor is turned ON when ECM outputs A/C ON signal or when engine coolant temp. is 110 °C, 230 °F or more.
DTC Detecting Condition and Trouble Area
DTC detecting condition
Monitor signal of A/C condenser cooling fan relay is different
from command signal.
(1 driving cycle detection logic but MIL does not light up)
Action
10
BLK/WHT
3
RED
4
WHT
E01
10
9
8
7
6
5
4
3
25
24
23
22
21
20
19
18
40
39 38
37
36
35
34
33
55
54 53
52
51
50
49
48
5. A/C condenser cooling fan motor
6. A/C compressor
7. ECM
8. "FI" fuse
Engine General Information and Diagnosis:
Intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection
Inspection in Section
00". If OK, substitute a
known-good ECM and
recheck.
BLK/WHT
E01-29
RED/BLK
E01-58
5
BLK
E01-47
GRY
6
2
1
15
14
13
12
11
17
16
30
29
28
27
26
44
32 31
45
43
42
41
59
47 46
60
58
57
56
• A/C condenser cooling fan relay circuit malfunction
• A/C condenser cooling fan relay malfunction
• ECM malfunction
Yes
Faulty ECM.
Substitute a known-
good ECM and recheck.
7
C01-58
BLK/ORN
C01-15
BLK
C01-30
BLK
E01-31
BLK
C01
10
9
8
7
6
5
4
3
25
24
23
22
21
20
19
18
40
39 38
37
36
35
34
33
55
54 53
52
51
50
49
48
9. "A/C" fuse
10. "IG COIL" fuse
Trouble area
1A-131
No
S7RW0A1104051
2
1
17
16
32 31
47 46
I6RW0D110042-01

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