The OEM (Original Equipment Manufacturer) camshaft position sensor is a critical component in modern vehicle engines, responsible for providing the Engine Control Unit (ECU) with accurate information about the position and timing of the camshaft. This data is essential for the proper operation of the engine, ensuring efficient fuel delivery, ignition timing, and emission control. In this comprehensive guide, we will delve into the intricacies of OEM camshaft position sensors, covering their specifications, testing procedures, and replacement considerations.
Understanding OEM Camshaft Position Sensors
OEM camshaft position sensors are designed and manufactured by the original vehicle manufacturer to meet the specific requirements of their engines. These sensors are typically supplied by reputable automotive component suppliers, such as Hitachi, which is the primary provider of OEM camshaft position sensors for Nissan vehicles.
Hitachi OEM Camshaft Position Sensors for Nissan
Nissan vehicles are equipped with two types of OEM camshaft position sensors from Hitachi: the angled sensor (part number CPS0005) and the straight sensor (part number CPS0008). These sensors can be purchased directly from Hitachi’s catalog, which is organized by vehicle make and model, and are typically available for under $50 each.
Sensor Resistance Values
To ensure proper function, OEM camshaft position sensors have specific resistance values that can be measured using a multimeter, such as the FLUKE model 87. The expected resistance values for a new Hitachi OEM camshaft position sensor are as follows:
| Pin Combination | Resistance Value |
|---|---|
| Pins 1-2 | 90K ohms |
| Pins 2-1 | 96K ohms |
| Pins 1-3 | 90K ohms |
| Pins 3-1 | 95K ohms |
| Pins 2-3 | 1.2K ohms |
| Pins 3-2 | 1.2K ohms |
These resistance values should be within the specified range to confirm the sensor is functioning correctly.
Compatibility with Other Vehicle Makes
While Hitachi is the primary supplier of OEM camshaft position sensors for Nissan vehicles, the company also provides these sensors for other vehicle makes, such as Chevrolet. For instance, the OEM camshaft position sensor for a 1998 Chevrolet Cavalier is the Mopar 4897023AA.
Aftermarket Sensor Considerations
It is important to note that the OEM camshaft position sensor may not be available for all vehicle models, especially older or discontinued models. In such cases, aftermarket sensors may be used as a replacement. However, it is crucial to understand that aftermarket sensors may not trigger exactly the same as the OEM sensors, which can cause issues with the ECU’s small tolerance for the timing of cam and crank signals.
Testing and Replacement Procedures
When testing or replacing a camshaft position sensor, it is essential to follow proper procedures to avoid damaging the sensor or causing further issues.
Sensor Testing
To test the camshaft position sensor, use a multimeter with calibrated meter leads and the correct pin numbers, which are left to right looking into the sensor connector, not the wire harness connector. Measure the resistance values and compare them to the expected values provided earlier.
Sensor Replacement
When replacing the camshaft position sensor, it may be necessary to go through a relearning process, especially if the synchronizer was removed or replaced. Additionally, it is recommended to replace the crankshaft position sensor at the same time with the same aftermarket brand to ensure proper synchronization and function.
Conclusion
The OEM camshaft position sensor is a critical component in modern vehicle engines, and understanding its specifications, testing procedures, and replacement considerations is essential for maintaining the proper operation of the engine. By following the guidelines outlined in this comprehensive guide, you can ensure that your vehicle’s camshaft position sensor is functioning correctly and avoid potential issues that may arise from using aftermarket or incompatible sensors.
Reference:
– Cam Sensors – Nissan OEM is Hitachi and How to Test Sensors
– Should I get all 4 OEM Camshaft Position Sensors or can they be Aftermarket?
– Live Data Cam Sensor Counts When…
– Camshaft Position Sensor OEM Mopar 4897023AA not available, are there any aftermarket brands that work?
– What are the signs of a failing camshaft position sensor?
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