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1A-186 Engine General Information and Diagnosis:
Step
4
Fuel line check
1) Check fuel pipe, fuel hose and joint for damage or
deform.
Are they in good condition?
5
Was fuel pressure higher than specification in Step 1?
6
Fuel line check
1) Check fuel pipe, fuel hose and joint for damage or
deform.
Are they in good condition?
7
Fuel pump operating sound check
1) Remove fuel filler cap and then turn ON ignition switch.
Can you hear operating sound?
8
Fuel line check
1) Check fuel pipe, fuel hose and joint for damage or
deform.
Are they in good condition?
Idle Air Control System Check
Wiring Diagram
GRN
5
4
WHT
6
8
7
80A
15
14
13
12
11
30
29
28
27
26
44
45
43
42
41
59
60
58
57
56
Action
3
BLK/YEL
BLK/YEL
BLK/YEL
1
E23
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
1. IAC valve
2. ECM
3. Main relay
Faulty fuel pressure
regulator.
Go to Step 6.
Faulty fuel pressure
regulator.
Go to Step 8.
Clogged fuel filter, faulty
fuel pump, faulty fuel
pressure regulator or
fuel leakage from hose
connection in fuel tank.
BLK/WHT
BRN/WHT
BLK/RED
BLK/RED
BLK/RED
BLK/RED
RED/WHT
BLK
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
4. "IG COIL" fuse
7. "FI" fuse
5. Ignition switch
8. "IG ACC" fuse
6. Main fuse box
Yes
Repair or replace
damaged or deformed
part.
Go to Step 7.
Repair or replace
damaged or deformed
part.
Faulty fuel pump.
Repair or replace
defective part.
2
E23-29
C37-58
BLK/ORN
C37-15
BLK
C37-30
BLK
E23-60
12V
5V
E23-1
E23-16
C37-49
C37
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
No
S4RS0A1104059
2
1
17
16
32 31
47 46
I4RS0A110079-
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