Where Is The Crank Sensor On A 2002 Nissan Altima?

The 1 1/2 inch long crank sensor should be twisted and pulled rearward after the bolt has been removed using a pair of 6″ normal slip jaw pliers. The substitute (…

Where is the sensor for the crank position located?

Depending on the kind and model of the vehicle’s engine, the crankshaft position sensor may be installed in a different place. It is frequently found in the front of the engine because, as is obvious, it is positioned closer to the crankshaft. Typically, it is fastened to the timing cover.

In various models, it can be positioned on the side or the back of the engine. The crankshaft position sensor can occasionally measure the clutch flywheel’s speed in order to estimate the crankshaft speed. In these kinds, the sensor is situated on the transmission’s bell housing.

What does the crankshaft sensor do?

The multipurpose sensor used to control ignition timing, gauge engine RPM, and gauge relative engine speed is the crankshaft position sensor. With this sensor, manual distributor timing is unnecessary.

Without a scanner, how do you reset a crank sensor?

For some automobiles, these Crank Relearn Instructions might not be applicable. However, they resemble how the majority of cars do it.

The relearn should be done as follows:

Connect a scanner to ensure sure the computer’s memory does not contain any error codes.

A power train failure code other than P1336 (Crankshaft Position Variation not learnt) will prompt the computer to disable relearn until the underlying issue has been resolved.

Additionally, confirm that the oil and engine coolant levels are appropriate (check them when the engine is cold).

Block the drive wheels and engage the parking brake. Make that the hood is shut.

2. After starting the engine, check that the engine coolant is at least 158 degrees Fahrenheit (70 degrees C.)

Keep in mind: You’ll be increasing the engine speed to roughly 3000, 4000, or 5150 RPM. Depending on the engine, that is the variation in fuel cutoff RPM. It is crucial to let off the gas when the engine RPM starts to drop as a result of the fuel cutoff taking effect. Failure to do so will cause the engine to overrev, perhaps damaging it.

8. After the engine has idled again, see if Diagnostic problem code P1336 is still active. The relearn procedure is finished if the scanner shows that the CASE has been learned. Check for the presence of other power train codes if CASE has not been learned. If any, fix the issue before repeating this process.

NOTE: If your scanner cannot access the Crankshaft Variation Relearn (certain vehicle applications 1998 and after), conduct the relearn as follows:

1. Disconnect all the extras. Start the engine, and let it idle in Park or Neutral for two minutes when the coolant and air temperatures are within five degrees (Centigrade) of one another.

2. Part-throttle accelerate the car to 55 mph. To get the engine up to operational temperature, go at 55 mph for 8 to 10 minutes.

3. Travel for an additional 5 to 6 minutes at 55 mph.

4. Without applying the brakes, reduce the speed to 45 mph and keep it there for one minute.

5. Decelerate four times for 25 seconds each without applying the brakes. No particular speed is required. between cycles of deceleration, 15 second return to 45 mph.

6. Increase speed to 55 mph and maintain it for two minutes.

7. When you stop the car, depress the clutch and let it idle for two minutes with the brakes applied and the transmission in Drive (for an automatic transmission) or Neutral (for a manual transmission).

How is a three-wire crank sensor tested?

Set your multimeter to DC voltage and take readings from the signal, reference, and ground wires to test a three-wire crank sensor. Your crank sensor is broken if the readings you get from these don’t agree with the instructions in the car’s manual.

Examine the location of the wires.

With a multimeter, you must individually test the signal and reference volt wires against the ground wire in order to diagnose your three-wire crankshaft sensor. Determining which wire is which is essential as a result.

Here, you consult the owner’s manual for your car. You can identify and find the wires inside the crank sensor.

However, this video clarifies that these wires often share common locations within the camshaft sensor.

Test the ground wire and the reference voltage wire.

After differentiating the wires, you should check to see whether any of them have flaws. The ground wire and the reference volt wire are the first pair you test.

You turn the ignition switch to the “on” position without starting the engine, and then you set the multimeter to read DC voltage. Connect the black (negative) line to the ground wire and the red (positive) lead to the reference volt wire.

Depending on the vehicle and the sensor you’re using, your multimeter should display a reading of between 5 and 12 voltage. One of these wires may be defective if you receive no readings or readings that are inconsistent. It might potentially indicate a problem with the camshaft sensor as a whole.

Test the ground wire and the signal wire.

You now turn on your engine, connect the black (negative) lead to the ground wire and the red (positive) line to the signal wire, and wait for your multimeter to give you a reading. We anticipate that the multimeter will show around 5 volts.

Your camshaft sensor has to be replaced if you receive no readings or readings that are inconsistent.

You can also see whether the problem is with your ground line. To accomplish this, unplug the camshaft connector, attach the black (negative) lead to the ground wire, then connect the red (positive) line to the positive terminal of your automobile battery.

The multimeter should display a reading of between 10 and 12 volts. If you are unable to understand this, the fuel injector is not receiving enough ground to operate as it should.

How is a crankshaft position sensor reset?

What would happen if you wanted to repair the crankshaft sensor without a scanner? The steps below must be followed if you can’t access the relearn using your scanner (which is possible for some vehicle applications):

  • Cut the accessories off. Start the engine while keeping the coolant and air temperature sensors 5C apart.
  • Allow the engine to idle in the park or neutral position now for two minutes.
  • Drive your automobile to 55 mph while only using part of the throttle. For up to ten minutes, continue traveling at this speed. By then, the engine ought to be at operating temperature.
  • Continue to cruise at the same speed for an additional five to six minutes.
  • Reduce the speed to 45 mph at this point without braking, and stay in this position for 1 minute.
  • Conduct four of these 25-second deceleration cycles without using the brakes or specifying a speed. In the 15 seconds between those deceleration cycles, return to the 45 mph count.
  • Next, accelerate to 55 mph and maintain this speed for an additional two minutes.
  • Finally, turn off your automobile and let it sit for two minutes. Clutch should be depressed and transmission should be in Drive or Neutral.

What symptoms indicate a bad crank sensor?

  • Car Start-Up Difficulties Could Be Caused by Crank Sensor Issues. If starting your car is difficult, that may be a sign that your crankshaft sensor is deteriorating.
  • Issues with engine vibration.
  • Fuel economy deterioration
  • Discrepant acceleration
  • Engine Check Light On

What does the crankshaft position sensor code mean?

P0335 stands for “Crankshaft Position Sensor “A” Circuit Malfunction,” a diagnostic trouble code (DTC). Numerous things can cause this, thus a technician must identify the precise cause in your case in order to clear the code. For $114.99, our licensed mobile mechanics will visit your house or place of business to perform the Check Engine Light diagnostic. You will receive an upfront estimate for the suggested fix and a credit of $20.0 off once we have been able to diagnose the issue. Our 12-month/12,000-mile warranty covers all of our repairs.

Can I change the crankshaft sensor on my own?

Although the crankshaft position sensor is a somewhat complex piece of machinery and you might be apprehensive about repairing it yourself, you shouldn’t be. You can replace your own crankshaft sensor with the correct equipment, some work, and clear instructions.

In how many cars are there crankshaft position sensors?

Engine speed sensors and crankshaft position sensors both rely on pulse detection and counting to function. A toothed disc positioned on the shaft, a stationary detector, and electrical circuitry make up the basic elements of these sensors (Fig-1). Around the disc’s perimeter are regularly spaced teeth or markings. Electrical pulses are produced when the shaft spins as teeth or markings pass by the fixed detector. These pulses’ frequency is identified, and it is then translated into the corresponding shaft rotation speed. By counting the pulses, one can determine the relative angular location. To determine the absolute position of the crankshaft or camshaft, additional reference markers are needed. The toothed wheel on the crankshaft is where the crank position sensor is often installed in the crankcase. The toothed wheel on the end of the camshaft is often where the camshaft position sensor is installed. On the front of the engine, it is typically buried beneath the timing chain cover. To establish the direction of the rotating motion, some sensors feature two sets of discs with a constant phase shift.

Magnetic pick-up coils, Hall-effect sensors, magneto-resistive element (MRE) sensors, and optical sensors are the four main types of crankshaft or camshaft position sensors. The first three make use of a wheel’s metal teeth to produce a series of electric pulses depending on variations in the magnetic field as the teeth approach the sensor. Optical position sensors detect optical marks on the shaft or slots in a disk as they pass the detector using a light-emitting diode (LED) light source and a photodiode. The optical components and disc must be kept clean to ensure an accurate reading, although optical sensors are accurate and suitable for both high-speed and low-speed applications.

What occurs if a crankshaft position sensor is not retrained?

What occurs if the crankshaft position sensor is not retrained? Your car won’t turn over. Or, your typical driving experience will totally alter because the ECU (electronic control unit) has been badly impacted.

Your car’s engine will actually be in bad shape and exhibit the following symptoms:

  • Due to the ECU sending faulty signals, the engine frequently malfunctions.
  • excessive engine revving
  • Engine damage that might be permanent

Failure to relearn the crankshaft position sensor is the root cause of all these issues. You should therefore understand everything you can about the crankshaft position sensor. To begin with, you must be well aware of what a crankshaft position sensor is.