The ECM evaluates engine speed and mass air flow if there is no vehicle speed signal. This evaluation of both values will detect open circuit or short circuit errors on the wheel speed sensor. The ECM sets DTC P2159 if there is no vehicle speed signal from wheel speed sensor while both engine speed and mass air flow are higher than predetermined threshold during the predetermined time.
Item | Detecting Condition | Possible Cause | |
DTC Strategy | Case 1 |
•
Range check | 1. Poor connector connection 2. Short or open in signal circuit 3. Faulty wheel speed sensor (FR) |
Case 2 |
•
Plausibility check | ||
Enable Condition | Case 1 |
•
Engine speed is higher than 3000 RPM | |
Case 2 |
•
Engine speed is at between 1000 RPM and 4520 RPM
•
Coolant temperature is higher than 40℃(104℉) | ||
Threshold Value | Case 1 |
•
Vehicle speed signal is above 270 km/h (167 mph) | |
Case 2 |
•
Vehicle speed is under 4 km/h (2.5 mph) during fuel cut-off | ||
Diagnostic Time |
•
2 sec. | ||
MIL ON Condition |
•
3 driving cycles | ||
