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1A-29 Engine General Information and Diagnosis:
DTC "C13" (P1750) or "C17" (P0105): IAP Sensor Circuit Malfunction
Detected Condition and Possible Cause
Detected Condition
IAP sensor voltage is not within the following range.
0.1 V ≤ Sensor voltage ≤ 4.8 V
NOTE
Note that atmospheric pressure varies
depending on weather conditions as well as
altitude.
Take that into consideration when inspecting
voltage.
Wiring Diagram
IAP sensor #2 (#2 cylinder)
IAP sensor #1 (#1 cylinder)
Troubleshooting
CAUTION
!
When using the multi-circuit tester, do not strongly touch the terminal of the ECM coupler with a
needle pointed tester probe to prevent terminal damage.
NOTE
After repairing the trouble, clear the DTC using SDS tool. Refer to "Use of SDS Diagnosis Reset
Procedures (Page 1A-13)".
B/Br
G/B
R
ECM coupler (Harness side)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Possible Cause
• Clogged vacuum passage between throttle body and
IAP sensor.
• Air being drawn from vacuum passage between throttle
body and IAP sensor.
• IAP sensor circuit open or shorted to ground.
• IAP sensor malfunction.
• ECM malfunction.
B/Br
P/B
R
16
17
35
36
37
38
39
40
33
34
44
45
46
47
48
49
B940H21104011
ECM
12
E2
3
IAP #2
.
5
VCC
IAP. #1
22
I940H1110017-01
41
42
43
50
51
52
I940H1110012-03
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