Malfunction of the ignition system on the car Nissan Sunny often causes serious difficulties when starting the engine, especially in the cold season. Owners of Japanese-made foreign cars are faced with the fact that the engine may stall while driving or may not respond at all to turning the key in the ignition. In most cases, the root of the problem lies in a critical engine control element - crankshaft position sensor. This sensor transmits information about the rotation speed and shaft position to the control unit, without which the operation of the fuel injection and ignition system becomes impossible.
Understanding that Where is the crankshaft sensor located on Nissan Sunny?, allows you to quickly conduct a visual inspection and exclude other causes of failure. The location of this element depends on the specific year of manufacture and modification of the power unit, whether it is old SR20DE or more modern QG15DE. Errors in diagnostics can lead to unnecessary replacement of expensive components, so it is important to know exactly which part needs to be approached with tools. In this article we will analyze in detail all the nuances of searching, checking and replacing this important unit.
Many car owners, having noticed an error P0335 on the dashboard, they immediately run to the store for a new sensor without checking its condition. However, the problem may be in the wiring or contamination of the working end. A competent approach to diagnostics will save you time and money. Let's look at how to correctly identify a fault and carry out repairs yourself, without resorting to the services of a car service.
Symptoms and signs of sensor failure
Determine the fault crankshaft sensor based on a number of characteristic signs that manifest themselves in engine operation Nissan Sunny. The most obvious signal is the inability to start the engine: the starter turns, but the engine does not catch. This happens because the control unit does not receive signals about the position of the pistons and does not supply a spark to the spark plugs. In some cases, the car may start, but operate unstably, with jerks and loss of power at idle.
Another common symptom is the engine stopping suddenly while driving. If crankshaft position sensor fails while driving, the car stalls and does not start again until the element cools down or is replaced. A decrease in dynamic characteristics may also be observed: the car loses power during acceleration, the speed does not rise above a certain value. Sometimes the indicator on the dashboard comes on Check Engine, indicating problems with the ignition or injection system.
It is important not to confuse these symptoms with malfunctions of other components, such as the fuel pump or spark plug wires. However, the combination of failure to start and the presence of an error code P0335 with a 90% probability it points to the sensor. If you notice at least one of the listed signs, it is necessary to carry out diagnostics as soon as possible in order to avoid complete vehicle failure on the road.
- π§ The engine does not start, the starter operates normally.
- π Sudden stop of the engine while driving without the possibility of restarting.
- π Loss of power and unstable idle operation.
- π‘ Lamp lights up
Check Enginewith error codeP0335.
β οΈ Attention: Ignoring signs of a faulty crankshaft sensor can lead to engine seizure due to incorrect ignition timing or overheating of the piston group.
Sensor localization on various modifications of Nissan Sunny
Location crankshaft sensor on models Nissan Sunny depends on the car generation and engine type. On most models with a series engine QG (For example, QG13DE, QG15DE, QG18DE) the sensor is installed in the lower part of the engine, on the gearbox side. You will have to look under the car or remove the crankcase guard to gain access. The sensor is attached to the clutch housing next to the flywheel.
On older models with a motor SR20DE The sensor may be located on the other side of the cylinder block, closer to the radiator or in the area of ββthe crankshaft pulley. In some cases it is built directly into the ignition distributor housing. Therefore, before starting work, be sure to check the model of your power unit. An error in determining the installation location will lead to loss of time and dismantling of unnecessary components.
You need to look for the element by looking at the wiring connector, which is usually black and is attached to the engine housing with a bolt. The wiring coming from the sensor often runs close to the exhaust manifold, putting it at risk of damage from high temperatures. Pay attention to the condition of the wire insulation, as they may rub against body parts or engine blocks.
- π Inspect the area near the flywheel and clutch housing.
- π Check the area around the crankshaft pulley.
- π Follow the wiring from the connector
ECUto the connection point.
β οΈ Attention: On series engines SR The crankshaft sensor is often located in a hard-to-reach place, requiring removal of the right fender liner and part of the plastic protection.
- QG13DE
- QG15DE
- QG18DE
- SR20DE
- Other
Step-by-step instructions for replacing the sensor
Replacement process crankshaft position sensor on Nissan Sunny is not particularly difficult if you have the necessary tools and access to the underside of the car. First you need to de-energize the system by disconnecting the negative terminal of the battery. This will prevent a short circuit when the sensor connector is disconnected. Then remove the crankcase guard if it interferes with access to the work area.
Find the sensor itself by its connector and carefully disconnect it by pressing the latch. Unscrew the mounting bolt that holds the sensor in the socket. Be careful as the sensor may become strongly stuck to the unit due to exposure to high temperatures and vibrations. Do not use excessive force to avoid damaging the motor housing or threads. Pull out the old element and clean the seat from dirt and oil.
Install new crankshaft sensor, making sure its magnetic tip is clean and undamaged. Tighten the mounting bolt with moderate force and connect the electrical connector until it clicks. After assembly, do not rush to start the engine: check that there are no oil leaks and that all components are securely fastened. Start the engine and make sure that the error P0335 disappeared.
βοΈ Sensor replacement process
Diagnostics of the sensor with a multimeter
Before buying a new sensor, it is worth checking the old one using multimeter. This will eliminate false diagnoses and save money. To check, you need to switch the device to resistance measurement mode (Ohm). Connect the multimeter probes to the sensor connector contacts. Normal resistance value for most sensors Nissan is in the range from 500 to 1500 Ohms, but it is better to check the exact data in the technical documentation for your model.
You should also check for a short circuit to ground. One probe of the multimeter is connected to any contact of the sensor, and the second to the engine body or metal parts of the body. The indicator should tend to infinity. If the multimeter shows zero or low resistance, then there is a short inside the sensor and it needs to be replaced. Also, inspect the inductor for mechanical damage.
For more accurate diagnostics, you can use an oscilloscope, but in a garage, a multimeter is usually sufficient. If the readings are outside the acceptable limits, replacement of the element is inevitable.
- π Measure the resistance between the sensor contacts.
- π Check the circuit insulation for short to ground.
- π Inspect the coil for cracks and signs of overheating.
Before removing the sensor, be sure to mark the position of its connector and wires so as not to confuse the polarity when installing a new element if the connector is asymmetrical.
Sensor parameters and compatibility table
When choosing a replacement, it is important to focus on the original catalog numbers and technical specifications. Sensors for different generations Nissan Sunny may differ in case length, connector type and resistance parameters. Using an unsuitable analogue can lead to unstable engine operation or complete failure. Below is a table with the main parameters for common models.
| Engine model | Catalog number | Resistance (Ohm) | Location |
|---|---|---|---|
| QG15DE | 23731-8H600 | 700β1000 | Clutch housing |
| QG18DE | 23731-8H600 | 700β1000 | Clutch housing |
| SR20DE | 23731-39900 | 500β800 | Front cylinder head cover |
| GA16DE | 23731-39901 | 400β700 | Clutch housing |
Please note that some manufacturers offer high-quality analogues, but their parameters must strictly correspond to the original. Please read the packaging and instructions carefully before purchasing. Saving on this part can result in frequent repairs and unstable operation of the car in the future. It is critical to select a sensor specifically for your engine modification, since differences in design may not be visually noticeable.
What is the difference between an inductive sensor and a Hall sensor?
Inductive sensors produce a signal by changing the magnetic field as the ring gear rotates, while Hall sensors use the semiconductor effect. On Nissan Sunny, inductive sensors are more common, which are easier to diagnose, but are sensitive to gaps.
Checking wiring and connector
Often the problem lies not in the sensor itself, but in damaged wiring or an oxidized connector. Engine vibration and high temperatures under the hood eventually destroy the insulation of the wires. Inspect the harness leading to the sensor for abrasions, breaks, or signs of melting. Pay special attention to areas near the exhaust manifold or sharp edges of the body.
The sensor connector may become oxidized due to moisture or oil. Carefully remove the contacts and clean them with a special contact cleaner or alcohol. If the pins are bent or broken, they will need to be repaired or the entire connector replaced. Poor contact will lead to interruption of the signal and errors in the memory of the control unit.
Check the integrity of the wires by pulling them with your hand and shaking them to reveal hidden breaks within the insulation. If you find a damaged area, insulate it with heat pipe or replace the wire. Reliable electrical connections are the key to stable engine operation. Don't ignore even minor insulation defects, as they can lead to serious problems over time.
- π Inspect the connector for oxidation and dirt.
- π Check the wires for chafing and breaks.
- π Make sure the contacts fit securely in the connector.
Even a new sensor will not work correctly if the wiring is damaged or the connector is oxidized, so diagnostics of the circuit is required.
β οΈ Attention: When checking wiring under load (engine running), be extremely careful not to short the wires to hot engine parts or moving machinery.
FAQ: Frequently asked questions
How much does it cost to replace a crankshaft sensor on a Sunni?
The cost of working with the service usually ranges from 1,500 to 3,000 rubles, depending on the complexity of access. The sensor itself costs from 1000 to 5000 rubles, depending on the manufacturer and engine model.
Is it possible to drive with a faulty crankshaft sensor?
No, it is impossible to operate a vehicle with a faulty sensor. The engine will either not start or stall at any moment, which can create an emergency situation on the road.
Do I need to reset errors after replacing the sensor?
In most cases, the error disappears after several cycles of starting and running the engine. If the error does not disappear, you need to reset it through the diagnostic scanner or disconnect the battery for 10-15 minutes.
Why doesn't the new sensor work?
The reasons may be: damaged wiring, oxidized connector, incorrect installation (incorrect gap), or defective sensor itself. It is necessary to carry out a comprehensive check of the circuit.
How often should the crankshaft sensor be replaced?
The sensor does not have a scheduled replacement period and serves until it fails. This usually happens after 100-150 thousand kilometers, but can happen earlier due to external factors.