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 vehicle speed above 40Km/h, and the signal is not received from VSS.
Item | Detecting Condition | Possible Cause | ||
DTC Strategy |
•
Signal monitoring |
•
Vehicle speed sensor circuit
•
Vehicle speed sensor component | ||
Enable Conditions |
•
During driving | |||
Threshold Value |
•
When vehicle speed above 40Km/h, and the signal is not received from VSS | |||
Diagnostic Time |
•
Refer to threshold Value | |||
Fail Safe | Fuel cut | NO | ||
EGR Off | NO | |||
Fuel Limit | NO | |||
Check Lamp | NO | |||
Sensing Type | LOW Signal Voltage | HIGH Signal Voltage | Signal Duty |
Hall sensor type | below 1.5V | above 3.5V | 50±5% |
