The wheel speed sensor is the essential component that the PCM uses to calculate vehicle speed. This wheel speed sensor is the active hall-sensor type and good at temperature and noise characteristic. 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 1.0 Km/h during 2 sec under enable conditions, PCM sets P0501.
Item | Detecting Condition | Possible Cause | |
DTC Strategy | ● Signal check (implausible) | [ABS/ESP Vehicle] ● Poor connection ● Open or short in signal circuit ● ABS/ESP Module [Non-ABS/ESP Vehicle] ● Poor connection ● Open or short in power circuit ● Open or short in signal circuit ● WSS | |
Case1 | Enable Conditions | ● Engine speed > 3000rpm ● Engine load > 49.5% ● Coolant temperature > - 6℃ ● Gear position : D or R | |
Threshold Value | ● Vehicle speed signal during fuel injection < 1.0 kph | ||
Case2 | Enable Conditions | ● Engine speed : 1520~3520rpm ● Coolant temperature > - 6℃ | |
Threshold Value | ● Vehicle speed signal during fuel cut-off < 1.0 kph | ||
Diagnostic Time | ● 2 sec | ||
MIL ON Condition | ● 2 driving cycle | ||
