8.14. Check of serviceability of a state and replacement of the sensor of speed of the movement of the car (VSS)

VSS is established on a case of transmission and represents the sensor with the pereenny magnetic resistance beginning to develop tension impulses as soon as the speed of the movement of the car passes for value 4.8 km/h (3 miles an hour). Impulses from the sensor arrive on ECM/PCM and are used by the module at management of duration of time of opening of injectors of injection of fuel and switching of transmission.

Check

 PERFORMANCE ORDER

1. Disunite the sensor electrical wiring plait socket. Measure by the voltmeter tension on the socket (see an accompanying illustration). Identification of the plug of a wire of food can be made according to schemes of electric connections (see the Head Onboard electric equipment). On the socket battery tension has to take place. If food is absent, check a condition of an electrical wiring of VSS on the site between the sensor and the assembly block of safety locks. By means of an ohmmeter check existence of conductivity between the plug of a black wire of the socket and weight. If conductivity is absent, check a condition of a black wire and quality of its terminal connections.

2. A car front also establish to Poddomkratta it on props. Prop up antiretractable boots back wheels and transfer transmission to neutral situation. Connect an electrical wiring to VSS, include ignition and test the voltmeter the plug of an alarm wire from a reverse side of the socket (the negative probe connect to the mass of a body). Holding one wheel motionless, manually rotate opposite – tension has to fluctuate ranging from zero to 5 V, otherwise replace VSS.

Replacement

 PERFORMANCE ORDER

1. Disconnect an electrical wiring from VSS.
2. Turn out a fixing bolt and remove the sensor from transmission.
3. Installation is made upside-down.