In the case of sensor failure, in many cases, the PCM will calculate a value to substitute for the failed sensor signal. The PCM can also use this calculated value to check the performance of working sensors by comparing the sensor's actual value to the calculated value. If the actual BPS is higher or lower than calculated value(threshold), the PCM determines that a fault exists and a DTC is stored. Because the calculated value is based on other sensor outputs, an inaccurate sensor signal will change the calculated value. If no problem is found with the Baro sensor, check the other sensors.
Item | Detecting Condition | Possible Cause | |
Case 1 | DTC Strategy |
•
Out of range, high | 1. PCM(BPS) |
Threshold Value |
•
BARO more than 115kPa | ||
Diagnostic Time |
•
Continuous | ||
Case 2 | DTC Strategy |
•
Out of range, low | |
Threshold Value |
•
BARO under 60kPa | ||
Diagnostic Time |
•
Continuous | ||
Case 3 | DTC Strategy |
•
Rationality check, high | |
Enable Conditions |
•
IG On or TPS(Throttle Position Sensor) more than 90% | ||
Threshold Value |
•
BARO-MAP more than 15 kPa or Delta BARO every 20 sec under -5 kPa | ||
Diagnostic Time |
•
2 sec. | ||
Case 4 | DTC Strategy |
•
Rationality check, low | |
Enable Conditions |
•
IG On or TPS(Throttle Position Sensor) more than 90% | ||
Threshold Value |
•
BARO-MAP under -15 kPa or Delta BARO every 20 sec more than 5 kPa | ||
Diagnostic Time |
•
2 sec. | ||
MIL ON Condition |
•
2 Driving Cycles | ||
