The PCM 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 PCM 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 |
•
Plausibility Monitoring | 1. Poor Connector Connection 2. Open or Short to Ground in Signal Circuit 3. Defected PCM |
Enable Conditions |
•
Engine speed higher than 2100 RPM
•
Mass Air Flow(Dependent on ECT) higher than 0.44 to 0.62 g/rev
•
No Fuel Injection Shut Off
•
Engine Coolant Temp. (ETC) higher than 77℉(25℃) | |
Threshold Value |
•
Vehicle Speed equal to 0 mph(0 km/h) | |
Diagnostic Time |
•
60 sec. | |
Mil On Condition |
•
2 Driving Cycle |
