Oldsmobile 24232617 Sensor Asm,Vehicle Speed

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Various engine sensors and components have checking procedures,the engine coolant temperature (ECT) sensor is a thermistor that changes resistance with temperature, and a failure in the circuit can cause trouble codes. The resistance should be measured when cold and warm while ensuring reference voltage from PCM is around 5.0 volts for the verification. Manifold Absolute Pressure (MAP) Sensor monitors changes in intake manifold pressure then varies its voltage output accordingly. Look at the reference voltage and signal voltage with the ignition on and engine off, and observe voltage changes as the engine's vacuum changes. Intake Air Temperature (IAT) Sensor acts as a thermistor where you can measure its resistance at different temperatures to make sure it changes as expected. Also, use a scan tool to monitor the IAT sensor for performance. The oxygen sensor in exhaust detects oxygen content which you can check its millivolt signal while warming up your engine. Check whether the oxygen sensor heater has correct voltage or not. Vehicle Speed Sensor (VSS) provides speed data to PCM which can be checked for reference voltage. Depending on the type of engine, Camshaft Sensor and Crankshaft Sensor should be checked for resistance and proper signal output. Finally, Knock Sensors detect engine knock which should be checked for reference voltage and resistance. If any component fails these checks, replacement may be necessary.

In 1993 and later models, the VSS is mounted on the transmission rear extension housing.

If any component fails these checks, replacement may be necessary.

The Vehicle Speed Sensor (VSS) is a permanent magnet generator mounted on the transmission.

The VSS produces an AC voltage that is proportional to vehicle speed.

The vehicle speed sensor (VSS) provides speed data to the PCM. To check it, you can check for reference voltage.

During the installation process, the O-ring seal needs to be inspected and replaced if damaged, and the transmission fluid level should be checked and topped up if necessary.

If any component fails these checks, replacement may be necessary.