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1A-180 Engine General Information and Diagnosis:
Step
11
Sensor power source circuit check
1) Connect connectors to ECM with ignition switch turned
OFF.
2) Turn ON ignition switch, measure each voltage between
"C37-14" terminal of ECM connector and vehicle body
ground.
Is each voltage 4 – 6 V?
12 Sensor power source circuit check
1) Disconnect connectors from ECM, TP sensor, MAP
sensor, A/C refrigerant pressure sensor and accelerator
pedal position (APP) sensor with ignition switch turned
OFF.
2) Measure each resistance between "C37-14" terminal of
ECM connector and vehicle body ground.
Is each resistance infinity?
Fuel Injector Circuit Check
Wiring Diagram
GRN
9
8
11
WHT
1
10
80A
15
14
13
12
11
30
29
28
27
26
44
45
43
42
41
60
59
58
57
56
1. Main fuse box
2. Main relay
3. ECM
Action
2
BLK/YEL
BLK/YEL
BLK/YEL
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
4. No.1 injector
5. No.2 injector
6. No.3 injector
ECM power and ground
circuit is in good
condition.
Check internal short
circuit of TP sensor,
MAP sensor and/or A/C
refrigerant pressure
sensor.
BLK/WHT
BRN/WHT
BLK/RED
BLK/RED
BLK/RED
BLK/RED
4
BLU/YEL
5
BLU/WHT
6
BLU/RED
7
BLU/ORN
2
1
15
14
13
12
11
17
16
30
29
28
27
26
44
32 31
45
43
42
41
47 46
60
59
58
57
56
7. No.4 injector
8. "IG COIL" fuse
9. Ignition switch
Yes
Go to Step 12.
"GRY/RED" wire is
shorted to ground
circuit.
3
E23-29
C37-58
BLK/ORN
C37-15
BLK
C37-30
BLK
E23-60
12V
5V
E23-1
E23-16
C37-1
C37-2
C37-16
C37-17
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
10. "FI" fuse
11. "IG ACC" fuse
No
S4RS0A1104056
2
1
17
16
32 31
47 46
I4RS0A110077-
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