What can a bad vehicle speed sensor cause?
What can a bad vehicle speed sensor cause?
Without a valid speed signal from these sensors, the PCM will not be able to correctly control the shifting of gears within the transmission. This may cause the transmission to shift roughly or more quickly than normal.
How does the vssb work on a GM car?
In the same fashion if gear ratios or tire sizes are changed, the module may be quickly swapped or reprogrammed for the correct ratios. The unit takes input from the transmission VSS (Vehicle Speed Sensor) to derive pulses per mile, according to the rotation of the transmission tailshaft.
What is the fault code for VSS inoperative speedometer?
ODB-II Fault code for VSS Inoperative Speedometer (stays at zero) Unresponsive speedometer (sits at zero then jumps to 15) Inoperative Cruise Control
What are the pigtails for a speed sensor?
Pigtails from used clippings to new connections for repair, Vehicle Speed Sensor (VSS) pigtails for various known OE sender applications. DRAC VSSB Parts – Mounting Brackets and Securing Fasteners
How often does a GM speed sensor pulse?
Most GM vehicle speed sensors pulse 40 times per revolution of the tailshaft. The output signal of the VSS is an AC signal. Digital Ration Adapter Controller (DRAC) and Vehicle Speed Sensor Buffer (VSSB) are both electronic devices that simply convert the input AC signal (from the VSS) to a calibrated digital DC signal.
When to change speed sensor buffer jumper settings?
The DRAC and VSSB units are pre-calibrated from the factory according to the vehicle’s stock gear ratio, and tire size. But, it can be re-calibrated by simply moving jumpers around. 1990-1991 vehicles should have the DRAC, and 1992-1995 vehicles should have the VSSB unit.
Is there a way to correct the speed sensor?
This Tech article shows you how to correct your speedometer, cruise control, and ABS systems by modifying the DRAC or VSSB unit on 1990-1995 General Motors vehicles with the electronic vehicle speed sensor.
In the same fashion if gear ratios or tire sizes are changed, the module may be quickly swapped or reprogrammed for the correct ratios. The unit takes input from the transmission VSS (Vehicle Speed Sensor) to derive pulses per mile, according to the rotation of the transmission tailshaft.
