Vehicle Speed Sensor(VSS) is hall sensor type and senses the rotating speed of differential gear mounted on transaxle.
Comparing engine speed with vehicle speed calculated based on vehicle speed sensor signal, ECM recognizes engaged gear. And based on the information about engaged gear, ECM performs optimum fuel injection quantity correction.
VSS signal is also used in speed meter of cluster, aircon control module, BCM, etc.
P0501 is set when 1)vehicle speed below 13.8Km/h is detected for more than 1 sec. at above 4000RPM and above 38.5 cc of fuel injection quantity or 2)above 240Kph is detected for more than 0.5 sec.
Item | Detecting Condition | Possible Cause | |
DTC Strategy | ● Signal monitoring | ● Vehicle speed sensor circuit ● Vehicle speed sensor component | |
Enable Conditions | ● During driving | ||
Threshold Value | ● Vehicle speed calculated by ECM is above 240Kph for more than 0.5 sec. ● When vehicle speed below 13.8Km/h is detected for more than 1.0 sec. at above 4000RPM and above 38.5mcc of fuel injection quantity. | ||
Diagnostic Time | ● Refer to threshold Value | ||
Fail Safe | Fuel Cut | NO | ● Clutch error monitoring inhibited ● Cruise control deactivated (for Cruise control option applied vehicle) ● Idle correction deactivated at low battery voltage |
EGR Off | NO | ||
Fuel Limit | NO | ||
Check Lamp | NO |
Sensing Type | LOW Signal Voltage | HIGH Signal Voltage | Signal Duty |
M/T : Hall sensor type A/T : driven by TCM | Below 1.5V | Above 3.5V | 50±5% |
