Engine management system of a modern car Nissan Murano is a complex set of electronic modules where each sensor plays a critical role. If one of them fails, the engine may run unstably or stop starting altogether. One of these key elements is the crankshaft position sensor, which synchronizes the operation of the ignition and fuel injection systems.
Crossover owners Nissan Murano Different generations often face problems starting the engine, especially in the cold season. Often the reason lies precisely in the failure of the crankshaft sensor. Its malfunction leads to the fact that the electronic control unit (ECU) loses information about the position of the pistons and cannot generate a spark at the right moment.
Purpose and principle of operation of the crankshaft sensor
The crankshaft position sensor (CPS) is a device that converts mechanical movement into an electrical signal. In cars Nissan Murano Most often, inductive sensors are used, which respond to the passage of the teeth of a special disk mounted on the crankshaft. This disc has gaps that allow the system to determine top dead center.
Signal from crankshaft sensor is fundamental for synchronizing the operation of all engine systems. Without it, correct spark formation and fuel injection are impossible. If the signal disappears or becomes incorrect, the ECU immediately blocks the fuel supply and turns off the ignition to prevent engine damage.
It is important to understand that this element operates in harsh conditions: parts rotate next to it, it is exposed to high temperatures and vibrations. That's why the resource crankshaft position sensor on Nissan Murano may be limited, especially if exposed to oil and dirt.
Main symptoms of malfunction
You can determine that the crankshaft sensor has failed by a number of characteristic signs. The most obvious symptom is the inability to start the engine. The starter turns, but the motor does not engage, since the ECU does not see the signal about shaft rotation.
Sometimes the problem manifests itself not so categorically, but in the form of unstable operation at idle. The engine may stall when stopping or at a traffic light, and the speed will fluctuate for no apparent reason. It is also possible that dips may occur when the gas pedal is pressed sharply.
- 🔴 Complete absence of engine starting when the starter is running
- 🟡 Unstable idle speed and spontaneous stalling
- 🟠 Errors appearing on the dashboard (Check Engine)
If you notice similar symptoms on your Nissan Murano, it is necessary to carry out a diagnosis as soon as possible. Ignoring the problem may leave you stranded on the road as the car will simply stop starting at any moment.
Diagnostics and error codes
To accurately identify the fault, you must connect the scanner to the vehicle's diagnostic connector. ECU Nissan Murano records errors associated with the crankshaft sensor signal and stores them in memory. The most common codes are P0335 and P0336.
Code P0335 means there is no signal from the crankshaft position sensor. Code P0336 indicates incorrect range or signal operation. However, the presence of an error code does not always guarantee that the problem is in the sensor itself. The wiring may be broken or the contacts may be oxidized.
Visual inspection also plays an important role. It is necessary to check the integrity of the wire insulation, the reliability of the connection connector and the presence of dirt or oil on the sensitive element of the sensor. The magnetic head of the sensor can attract metal filings, which distorts the signal.
You can use a multimeter to check functionality. By measuring the resistance of the sensor winding, you can understand whether a break has occurred inside. Normal values are usually indicated in the service documentation, but for Nissan Murano they are often between 500 and 1500 ohms, depending on the model.
- Less than 100,000 km
- 100,000 - 200,000 km
- More than 200,000 km
- I don't know for sure
Procedure for replacing the sensor on a Nissan Murano
Replacing the crankshaft sensor with Nissan Murano - a procedure that you can perform yourself if you have the necessary tools and access to the engine. The sensor is usually located at the bottom of the engine, near the flywheel or crankshaft pulley. Depending on the generation (Z50, Z51, Z52), access may vary.
Before starting work, it is necessary to de-energize the vehicle by disconnecting the negative terminal of the battery. This is a standard precaution when working on electrical equipment. Next you need to find the sensor itself. On many models it is attached with one bolt to the cylinder block.
☑️ Preparation for replacement
You need to remove the connector carefully by pressing the latch. After unscrewing the mounting bolt, the sensor is pulled out of its seat. Pay attention to the O-ring, which should remain on the old sensor or go to the new one if it is not included in the kit.
Installing a new element is done in the reverse order. It is important not to overtighten the mounting bolt to avoid damaging the sensor housing. After connecting the connector and attaching the battery, you need to reset the errors with the scanner and try to start the engine.
If replacement does not help, the problem may lie in the sync disk itself or the wiring. In such cases, more in-depth diagnostics using an oscilloscope will be required.
Selecting quality spare parts
The quality of the crankshaft sensor directly affects the reliability of the engine. Cheap analogues often have errors in coil winding or poor-quality insulation, which leads to rapid failure. For Nissan Murano It is recommended to choose original spare parts or trusted brands.
Genuine Nissan sensor ensures accurate performance and durability. However, there are high-quality analogues from manufacturers such as Denso, Hitachi or Bosch, which are often installed on the assembly line. The main thing is to avoid fakes, of which there are a lot on the market.
- ✅ Original spare part number (check by VIN code)
- ✅ Trusted brands: Denso, Hitachi, Bosch
- ❌ Avoid unknown Chinese manufacturers without a brand
When purchasing, always check the packaging for holograms and barcodes. It is also worth paying attention to the appearance of the sensor: it should be clean, without signs of damage, and the wires should be flexible and intact.
Nuances and common problems
By car Nissan Murano With 3.5 liter gasoline engines (VQ35DE), the crankshaft sensor often fails due to overheating. Heat from the engine is transferred to the sensor, and over time the insulation on the wires can crack, causing a short circuit.
Another problem is contamination of the sensing element. If the crankshaft oil seal leaks oil, it gets to the sensor. Oil can change the magnetic properties or simply create an insulating layer that prevents the signal from being read.
Sometimes owners are faced with the fact that after replacing the sensor the problem returns after a short period of time. In such cases, you need to check the gap between the sensor and the synchronization disk. If the disc is bent or damaged, the new sensor will also quickly fail.
⚠️ Attention: When installing a new sensor, be sure to check the presence and condition of the O-ring. The absence of an ring can lead to oil getting inside the housing and its rapid failure.
Specifications and data table
To correctly select and test the sensor, it is important to know its basic technical parameters. Below is a table with approximate resistance values and other characteristics for popular motors Nissan Murano.
| Parameter | Meaning | Unit of measurement | Note |
|---|---|---|---|
| Winding resistance | 500-1500 | Ohm (Ohm) | Depends on temperature |
| Operating voltage | 5-12 | Volt (V) | Powered by ECU |
| Signal type | Analog | - | Inductive sensor |
| Number of disc teeth | 60-2 | pcs. | 2 teeth missing |
| Disc distance | 0.5-1.5 | mm | Gap Analysis |
⚠️ Attention: Do not try to test the sensor by “hearing” or by tapping. This can lead to mechanical damage to the fragile ceramics inside the case.
Understanding these parameters will help you not only when replacing, but also when diagnosing yourself. If the multimeter shows values outside the specified range, the sensor must be replaced.
Why might the sensor get hot?
The sensor is located in close proximity to the exhaust manifold and the engine itself, so it operates in high temperature conditions. Over time, this leads to degradation of wire insulation and internal winding breakage, especially if clearances are not maintained during installation.
Repair costs and alternatives
Cost of replacing crankshaft sensor Nissan Murano varies depending on whether you do it yourself or contact a service. The sensor itself is relatively inexpensive, especially if you choose a high-quality analogue. The service may take from 30 minutes to an hour.
If you decide to contact an official dealership, the cost of work will be higher, but you will receive a guarantee for the work performed and original spare parts. Independent service stations offer more affordable prices, but it is important to make sure that the technicians are qualified.
Sometimes drivers try to restore the old sensor by cleaning it from dirt or rewinding the winding. This may give a temporary effect, but the reliability of such repairs is extremely low. It is better to immediately replace the element with a new one.
You should not save on this unit, since the cost of vehicle downtime and possible repairs of other systems due to incorrect engine operation can be many times higher than the price of a new sensor.
⚠️ Attention: If after replacing the sensor the engine starts and runs normally, but after a while the problem returns, be sure to check the integrity of the wiring harness and the absence of contact with hot engine parts.
Timely replacement of the crankshaft sensor and the use of high-quality spare parts is the key to stable operation of the Nissan Murano engine without unexpected stops along the way.
Prevention and care
In order for the crankshaft sensor to serve as long as possible, it is necessary to follow the operating rules of the vehicle. Regularly checking the wiring condition and engine cleanliness are important. If oil gets on the sensor, it should be carefully cleaned.
It is also recommended to periodically check the gap between the sensor and the synchronization disk, especially after carrying out work on the engine or gearbox. Incorrect installation can cause rapid wear.
Use only high-quality oil and carry out maintenance on time. This will reduce the risk of deposits and leaks that could damage the sensor. On Nissan Murano With high mileage, it is worth paying special attention to the condition of the crankshaft seals.
Before purchasing a new sensor, be sure to clean the seat on the engine block of old dirt and oil to ensure a tight fit of the new O-ring.
Conclusion
The crankshaft position sensor is a critical element of the engine management system. Nissan Murano. Its malfunction can completely paralyze the operation of the car, leaving you in a difficult situation. Understanding the symptoms, correct diagnosis and timely replacement will help avoid serious problems.
Don't try to ignore signs of trouble or delay repairs. Modern diagnostic systems allow you to quickly find the cause of a breakdown. High-quality spare parts and proper installation will provide you with confidence in the reliability of your car.
If you are not confident in your abilities, it is better to entrust the work to professionals. However, by following our recommendations, you can save money and gain the necessary skills for DIY repairs. Remember that regular attention to the technical condition of the car prolongs its life.
What symptoms indicate a bad crankshaft sensor on a Nissan Murano?
The main symptoms include the inability to start the engine, unstable idle speed, spontaneous stalling and the appearance of a Check Engine error. Often the engine starts but immediately stalls.
How to check the crankshaft sensor with a multimeter?
It is necessary to disconnect the connector and measure the resistance between the sensor contacts. The normal value is usually 500-1500 ohms. You can also check for an open or short to ground.
Is it possible to drive with a faulty crankshaft sensor?
No, it is impossible to drive with a faulty sensor, as the engine will not work. If the sensor does not work correctly, the engine may become unstable, but continuing to drive for long distances is not recommended due to the risk of a complete stop.
Where is the crankshaft sensor located on a Nissan Murano?
The sensor is located at the bottom of the engine, near the flywheel or crankshaft pulley. The exact location depends on the model generation (Z50, Z51, Z52) and engine type.
Which sensor is better to choose: original or analogue?
It is recommended to choose an original Nissan sensor or high-quality analogues from trusted manufacturers such as Denso or Hitachi. Cheap analogues may be of poor quality and quickly fail.