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1A-66 Engine General Information and Diagnosis:
DTC P0111: Intake Air Temperature Sensor 1 Circuit Range / Performance
Wiring Diagram
Refer to "DTC P0101: Mass or Volume Air Flow Circuit Range / Performance".
DTC Detecting Condition and Trouble Area
DTC detecting condition
Variation of IAT sensor signal is less than 15 mV for 10 minutes even
though ECT reaches 70 °C (158 °F).
(2 driving cycle detection logic)
DTC Confirmation Procedure
NOTE
Check to make sure that the following conditions are satisfied when using this "DTC Confirmation
Procedure".
• Intake air temperature at engine start: –10 °C (14 °F) to 80 °C (176 °F)
• Intake air temperature: –10 °C (14 °F) to 70 °C (158 °F)
• Engine coolant temperature: 70 °C (158 °F) to 150 °C (302 °F)
• Altitude (barometric pressure): 2400 m, 8000 ft or less (560 mmHg, 75 kPa or more)
• The following DTCs are not detected: DTCs related to ECT sensor, IAT sensor (other than P0111) and
barometric pressure sensor
1) With ignition switch OFF, connect scan tool.
2) Turn ON ignition switch, clear DTC.
3) Start engine and warm up to normal operating temperature.
4) Drive vehicle more than 37 mph (60 km/h) for 15 min.
5) Stop vehicle and run engine at idle speed.
6) Check DTC and pending DTC.
DTC Troubleshooting
Step
1
Was "Engine and Emission Control System Check"
performed?
2
IAT sensor check
1) Check IAT sensor for performance referring to "Mass Air
Flow (MAF) and Intake Air Temperature (IAT) Sensor
Inspection in Section 1C".
Is it in good condition?
3
Wire harness check
1) Check signal and ground circuits of IAT sensor for
condition referring to Step 2 and 3 of "DTC P0112 /
P0113: Intake Air Temperature Sensor Circuit Low / High
Input".
Are they in good condition?
DTC P0112 / P0113: Intake Air Temperature Sensor Circuit Low / High Input
Wiring Diagram
Refer to "DTC P0101: Mass or Volume Air Flow Circuit Range / Performance".
Action
Trouble area
• IAT sensor and/or its circuit
• ECM
Yes
Go to Step 2.
Go to Step 3.
Substitute a known-
good ECM and recheck.
S6RW0C1104019
No
Go to "Engine and
Emission Control
System Check".
Replace MAF and IAT
sensor.
Repair or replace.
S6RW0C1104020
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