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 ECM/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 | ||
Case 1 | DTC Strategy |
•
Rationality check | 1. Poor connection 2. IATS |
Enable Conditions |
•
Elapsed time after start is lower than 40 sec. | ||
Threshold Value |
•
The temperature difference between IAT and ECTS is lower than 20.3 ℃ | ||
Diagnostic Time |
•
2 sec. | ||
MIL ON Condition |
•
2 Driving cycles | ||
Case 2 | DTC Strategy |
•
Rationality check | |
Enable Conditions |
•
Number of driving conditions for at least 15 sec at a speed less than 4.8km/h is greater than 4 times
•
Number of driving conditions for at least 8 sec at speed higher than 48km/h is greater than twice | ||
Threshold Value |
•
The maximum temperature and minimum temperature difference value is lower than 1.5℃ | ||
Diagnostic Time |
•
2 sec. | ||
MIL ON Condition |
•
2 Driving cycles | ||
