The VSS (Vehicle Speed Sensor) is a hall sensor type. The vehicle speed sensor is buit into the speedometer and converts the transaxle gear revolutions into the pulse signals, which are sent to ECM.
This pulse signal is fed to ECM to be used to determine the vehicle driving or stop condition including the vehicle speed.
The vehicle speed sensor provides ECM with information on the gear position in the manual transmission vehicle and on the gear shifting in the auto transaxle vehicle after computing the engine speed and the vehicle speed signal.
If the CMP signal is not geneated, the ECM judged this as a fault and DTC is set.
Item | Detecting Condition | Possible Cause |
DTC Strategy | ● Rationality check, low | ● Open or short in power circuit ● Open or short in Vss circuit ● Fuse blown ● Faulty VSS ● Faulty ECM |
Enable Conditions | ● Engine speed > 3500 rpm and injection quantity > 45 mcc | |
Threshold Value | ● Vehicle speed signal < 15 Km/h | |
Diagnostic Time | ● 4 sec. | |
MIL Fuel Limit Fuel Cut EGR Off | ● No ● No ● No ● No | |
Fail safe | ● Clutch error monitoring deactivited ● Cruise control system and error monitoring deactivited ● Idle compensation deactivited in case of the lack of battery voltage |
