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 MANUALSCADILLAC1996ELDORADO V8-4.6L VIN 9REPAIR AND DIAGNOSISCRUISE CONTROLVEHICLE SPEED SENSOR/TRANSDUCER - CRUISE CONTROLDESCRIPTION AND OPERATION
1996 Cadillac Eldorado V8-4.6L VIN 9
Vehicle Speed Sensor/Transducer - Cruise Control: Description and Operation
1996 Cadillac Eldorado V8-4.6L VIN 9SECTION Description and Operation
DESCRIPTION
On front wheel drive vehicles the speed sensor is mounted in the transaxle. A magnet rotates near a coil, producing voltage pulses in the coil. As speed increases, so do the number of voltage pulses per second.
OPERATION
The speed sensor buffer takes the sensor/voltage pulses from the sensor and uses them to close two solid state output switches. Each output terminal is switched to ground at a rate that is proportional to the speed of the car. The speedometer and the ECM are switched at 4000 pulses per mile. The output switches in the speed sensor are solid state. Self-powered test lights or ohmmeters should not be used to test them. Do not measure the resistance at the outputs of the buffer.
On front wheel drive vehicles the speed sensor is mounted in the transaxle. A magnet rotates near a coil, producing voltage pulses in the coil. As speed increases, so do the number of voltage pulses per second.
OPERATION
The speed sensor buffer takes the sensor/voltage pulses from the sensor and uses them to close two solid state output switches. Each output terminal is switched to ground at a rate that is proportional to the speed of the car. The speedometer and the ECM are switched at 4000 pulses per mile. The output switches in the speed sensor are solid state. Self-powered test lights or ohmmeters should not be used to test them. Do not measure the resistance at the outputs of the buffer.
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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.