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DTC P0110 (DTC NO.18) INTAKE AIR TEMP. (IAT) CIRCUIT MALFUNCTION
WIRING DIAGRAM / CIRCUIT DESCRIPTION
DTC DETECTING CONDITION
• Low intake air temperature (High voltage-High resistance)
or
• High intake air temperature (Low voltage-Low resistance)
NOTE:
• When DTC P0105 (No.11), P0110 (No.18), P0115 (No.19) and P0120 (No.13) are indicated together, it
is possible that "ORN" circuit is open.
• Before inspecting, be sure to check that ambient temperature is higher than – 40°C (– 40°F).
DTC CONFIRMATION PROCEDURE
1) Clear DTC, start engine and keep it at idle for 1 min.
2) Select "DTC" mode no scan tool and check DTC.
INSPECTION
Step
1
Was "ENGINE DIAG. FLOW TABLE" per-
formed?
2
Check IAT Sensor and Its Circuit.
1) Connect scan tool to DLC with ignition
switch OFF.
2) Turn ignition switch ON.
3) Check intake air temp. displayed on scan
tool. See Fig. 1.
Is – 40°C (– 40°F) or 119°C (246°F) indicated?
LT GRN/BLK
C42 (31P)
9
8
7
6
5
4
3
2
1
21
20
19
18
17
16
15
14
13
12
11
10
31
30
29
28 27
26
25
24
23
22
Action
ENGINE GENERAL INFORMATION AND DIAGNOSIS 6-55
C42-15
ORN
C42-10
C41 (24P)
7
6
5
4
3
2
1
6
16
15
14
13 12
11
10
9
8
12
24
23
22
21
20
19
18
17
17
• "LT GRN/BLK" circuit open or shorted to
power.
• "ORN" circuit open
• IAT sensor malfunction
• ECM malfunction
Yes
Go to Step 2.
Go to Step 3.
ECM
5V
G02 (17P)
5
4
3
2
1
11
10
9
8
7
16
15
14
13
POSSIBLE CAUSE
No
Go to "ENGINE DIAG.
FLOW TABLE".
Intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection" in
Section 0A.
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