VEHICLE SPEED SENSORS
Basically, the VSS tells the ECM how fast the vehicle is going. Most people think the VSS is only used for the lock-up
torque converter. The VSS is also used to control the EGR valve, the charcoal canister purge valve, the electric cooling
fans, idle speed, and air/fuel ratio. This is all explained in the Chevrolet shop manual (available from Helm at
(800)782-4356), which is required reading for installing the TPI/TBI engine into your vehicle.
1. VSS, BUFFERS, AND DRACS 2. 40 PULSE PER DRIVESHAFT REVOLUTIONVEHICLE SPEED SENSORS 3. PASSENGER CAR VEHICLE SPEED SENSORS
4. STEALTH CONVERSIONS VEHICLE SPEED SENSORS 5. TRANSMISSION TUNNEL CLEARANCE PROBLEMS 6. VSS MOUNTING OPTIONS
7. 4L60-E RELUCTOR RING RELOCATION 8. 4L60-E 4X4 APPLICATIONS 9. RELUCTOR RING AND SPEEDOMETER CLAMP FOR 4L60-E TRANSMISSIONS
10. 4L60-E RELUCTOR RING RELOCATION 11. RELUCTOR RING SLEEVE ASSEMBLY 12. 4L60-E RELUCTOR RING RELOCATION
13. 4L60-E TAILHOUSING WITH SPEED SENSOR 14. 4L60-E WITH VSS MOUNTED ON PASSENGER’S SIDE 15. DIFFERENTIAL MOUNTED 40-TOOTH RELUCTOR RING
16. DIFFERENTIAL MOUNTED RELUCTOR-RING KIT 17. SPEEDOMETER CALIBRATION
VEHICLE SPEED SENSORS ( VSS) WIRE
Vehicle Speed Sensor (VSS)
In addition to the standard power and ground leads, many car navigation
systems connect to a vehicle's Vehicle Speed Sensor (VSS) wire. The VSS wire
is used by the vehicle's cruise control to determine the vehicle's speed - it serves
the same function for the car navigation system. The VSS wire sends a series of
pulses, anywhere from 800 to just over 1,000 per mile, and sends these pulses
only when the car is in motion. If the VSS wire is not hooked up, then the unit will
not realize that the car is moving at all, and will be unable to track position.
The photos and information I provide were gathered from a 2005 KIA Sorento.
Color codes of wires should be the same for all years but I give no guarantee. If
someone finds a difference let me know and we will change the DIY to
accommodate the difference.
Output Vehicle Speed Sensor (VSS)
CIRCUIT DESCRIPTION
The No. 2 vehicle speed sensor detects the rotation speed of the transmission output shaft and sends signals
to the ECM. The ECM determines the vehicle speed, based on these signals. An AC voltage is generated
in the No. 2 vehicle speed sensor coil as the rotor mounted on the output shaft rotates, and this voltage
is sent to the ECM. The gear shift point and lock–up timing are controlled by the ECM, based on the signals
from this vehicle speed sensor and the throttle position sensor. If the No. 2 vehicle speed sensor malfunctions,
the ECM uses input signals from the No. 1 vehicle speed sensor as a back–up signal.
Video
VSS or Vehicle Speed sensor
Explains the Vehicle speed sensor scanner testing. The vehicle speed sensor is used by the transmission computer or TCM to shift the unit.
