The PCM/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 PCM/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 |
•
Plausibility Check | 1. Open or short in harness 2. Poor connection or damaged harness 3. WSS |
Enable Conditions |
•
Engine speed > 2100rpm
•
Air mass flow > 0.44g/rev.
•
No fuel injection shut off
•
Coolant Temp. > 77℉ | |
Threshold Value |
•
VSS = 0 with high engine speed and load | |
Diagnostic Time |
•
60sec. | |
MIL On Condition |
•
2 Drive Cycles |
