What is the VSS input on a car?
The VSS input is used by the vehicle’s main computer called a PCM/ECM powertrain/engine control module along with other inputs for proper operation of the vehicle systems. Typically, the VSS is an electromagnetic sensor that uses a rotating reluctor ring to complete an input circuit to the PCM.
Why does my VSS have a low voltage input?
A low voltage input condition may be caused by either an electrical or mechanical problem. A typical VSS or vehicle speed sensor: Related vehicle speed sensor trouble codes: P0501 Vehicle Speed Sensor “A” Range/Performance P0503 Vehicle Speed Sensor “A” Intermittent/Erratic/High
When to set plausibility code on WSS sensor?
On some newer vehicles, “plausibility” codes may also be set if the speed reading of any WSS sensor differs from the vehicle speed sensor by more than 3 to 5 mph.
How is the VSS used in a PCM?
Typically, the VSS is an electromagnetic sensor that uses a rotating reluctor ring to complete an input circuit to the PCM. The VSS is mounted in the transmission housing at such a position as to allow the reluctor ring to pass by it; in close proximity.
How to test the resistance of the VSS sensor?
1 Turn the ignition switch to the OFF position. 2 Disengage the wiring harness connector from the VSS. 3 Using a Digital Volt-Ohmmeter (DVOM), measure the resistance (ohmmeter function) between the sensor terminals. If the resistance is 190–250 ohms, the sensor is okay.
How is the VSS sensor used in the PCM?
OPERATION The Vehicle Speed (VSS) Sensor input is used by the PCM to determine vehicle speed. The VSS generates a signal that increases in frequency proportionate to vehicle speed. The PCM has a base frequency stored in memory for a distance of one mile.
How do you install a VSS in a car?
Ensure that the O-ring is properly seated in the VSS housing. For ease of assembly, engage the wiring harness connector to the VSS, then insert the VSS into the transmission assembly. Install and tighten the VSS hold-down bolt to 62–88 inch lbs. (7–10 Nm). Lower the vehicle and remove the wheel blocks.
How does the vehicle speed sensor ( VSS ) work?
The Vehicle Speed Sensor (VSS) is a magnetic pick-up that sends a signal to the Powertrain Control Module (PCM). VSS – Vehicle Speed Sensor Vehicle Speed Sensor (VSS) OPERATION The Vehicle Speed (VSS) Sensor input is used by the PCM to determine vehicle speed. The VSS generates a signal that increases in frequency proportionate to vehicle speed.