Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBUICK1996CENTURY SEDAN L4-2.2L VIN 4REPAIR AND DIAGNOSISCRUISE CONTROLVEHICLE SPEED SENSOR/TRANSDUCER - CRUISE CONTROLDESCRIPTION AND OPERATION
1996 Buick Century Sedan L4-2.2L VIN 4
Vehicle Speed Sensor/Transducer - Cruise Control: Description and Operation
1996 Buick Century Sedan L4-2.2L VIN 4SECTION Description and Operation
DESCRIPTION
On models with conventional instrument panels, a speedometer frame mounted optic head is used to pick up light reflected by a speedometer cable mounted blade. The reflected light is produced by a light emitting diode (LED). As the speedometer cable mounted blade enters the LED light beam, the light is reflected into the optic head. From there, the light enters a photocell in the optic head and produces a low power speed signal. This signal is sent to a buffer for amplification and conditioning, then to the controller.
On models with electronic speedometers or electronic instrumentation, a transmission mounted speed sensor is used. This sensor utilizes a permanent magnet (PM) to generate vehicle speed information to the controller. Some models use a buffer amplifier to modify the sensor output.
On models with conventional instrument panels, a speedometer frame mounted optic head is used to pick up light reflected by a speedometer cable mounted blade. The reflected light is produced by a light emitting diode (LED). As the speedometer cable mounted blade enters the LED light beam, the light is reflected into the optic head. From there, the light enters a photocell in the optic head and produces a low power speed signal. This signal is sent to a buffer for amplification and conditioning, then to the controller.
On models with electronic speedometers or electronic instrumentation, a transmission mounted speed sensor is used. This sensor utilizes a permanent magnet (PM) to generate vehicle speed information to the controller. Some models use a buffer amplifier to modify the sensor output.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.