2.
Probe(+) :Measure the waveform of Vehicle speed sensor at terminal 2.
Probe(-) :Chassis ground.
This is the inspection procedure to determine whether it is present DTC or memoried one by monitoring the current signal or by using the function of oscilloscope with Hi-scan pro.
IG KEY : ON
Engine condition: After warm up ,idling or in acceleration
Sensor output: Check the change of service data while accelerating engine form idle.
Service standard
Approximately 40 Km/h
The data shown above is only for reference and there may be a little difference actually.
Drive the vehicle at 40 Km/h on the lifter.
Probe(+) :Measure the waveform of Vehicle speed sensor at terminal 2.
Probe(-) :Chassis ground.
Service standard
Approximately 40 Km/h
This is the waveform of vehicle sensor when it drives 40Km/h.
-The voltage at point ① should be below 0.8V and at poiont ② should be above 7V.
-The frequency of vehicle sensor must increase as the RPM increases.
If the vehicle speed on scan tool and that of instrument pannel coincide,when driving at 40Km/h, the sensor is normal.
In case there is no symptom and wrong data but DTC is shown
The problem may be intermittent so slightly shake the connector and harness vertically and horizontally to check if there is any data changes
If the data changes normally, the problem was intermittent so erase DTC and verify the same DTC reoccure.
Go to "Terminal and Connector inspection"
In case there is symptom and wrong data with DTC
Check open,short or connector’s connection for VSS.
Check the deterioration of VSS performance.
Go to "Signal circuit inspection"
This is the waveform of vehicle sensor when it drives 40Km/h.
The voltage at point ① should be below 0.8V and at poiont ② should be above 7V.
The frequency of vehicle sensor must increase as the RPM increases.
