This DTC sets when the IAT value is higher than a calibrated value indicating that the rationality test has failed and could prevent one or more on board diagnostic (OBD) monitors from completing.
The PCM runs this logic after an engine OFF and a calibrated soak period (typically 6 - 8hours). This soak period allows IAT and other temperature sensors to stabilize and not differ by greater than a calibrated value. DTC P0111 sets when the IAT at engine start exceeds the other temperature sensors by greater than a calibrated value.
Item | Detecting Condition | Possible Cause | |
Case 1 | DTC Strategy |
•
Out-of-range high. | 1. Poor connection 2. IATS |
Enable Conditions |
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(A) Vehicle speed greater than 31 mph(49.88 km/h).
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(B) Air mass flow greater than 24kg/h and less than 160 kg/h.
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After sum of (A) and (B) condition for 8sec. | ||
Threshold Value |
•
IAT greater than 110 ℃(230 °F). | ||
Diagnostic Time |
•
2 sec. | ||
MIL ON Condition |
•
- | ||
Case 2 | DTC Strategy |
•
Electrical Check(Noisy signal check). | |
Enable Conditions |
•
- | ||
Threshold Value |
•
Absolute value of difference of IAT sensor voltage and Intergrated sensor voltage greater than 0.498 V. | ||
Diagnostic Time |
•
5 sec. | ||
MIL ON Condition |
•
- | ||
Case 3 | DTC Strategy |
•
Signal stuck check ;(Max-Min) IAT check after sufficient driving. | |
Enable Conditions |
•
Vehicle speed less than 3 mph(4.82 km/h) for 14 sec equal to or over 5 times, and Air mass flow less than 24 kg/h.
•
Vehicle speed greater than 37 mph(59.54 km/h) for 8 sec equal to or over 2 times, and Air mass flow greater than 40 kg/h and less than 300 kg/h.
•
ECT at cranking under 75 ℃(167 °F). | ||
Threshold Value |
•
Difference of Max. IAT and Min. IAT less than 1.5 ℃(34.7 °F). | ||
Diagnostic Time |
•
Immediate. | ||
MIL ON Condition |
•
2 Driving cycles. | ||
