The wheel speed sensor is the essential component taht the PCM uses to calculate vehicle speed. This wheel speed sensor is the active hall-sensor type and good at temperature and noise chariteristic. Digital wave is produced as tone wheel rotate according as hall sensor principle. Frequency of duty wave is changed in proportion to rotation of tone wheel and PCM gets vehicle speed through ABS/ESP control unit or the wheel speed sensor(In case of non-ABS/ESP vehicle).
If the vehicle speed signal is below 5.0 Km/h during 5 sec under enable conditions, PCM sets P0501.
Item | Detecting Condition | Possible Cause |
DTC Strategy | ● Signal check | ● Poor connection ● Open or short to ground in power circuit ● Short to ground in signal circuit ● VSS ● PCM |
Enable Conditions | ● (M/T or A/T) Engine speed during fuel cut-off 1520~4000rpm ● (only A/T at D or R position) Engine speed > 3000rpm, Engine load > 49.5% ● Coolant temperature > 65℃ | |
Threshold Value | ● Vehicle speed signal ＜ 5.0 Km/h | |
Diagnostic Time | ● 5 sec | |
MIL ON Condition | ● 3 driving cycle |
