Checking the crankshaft sensor on a Nissan Sunny: 5 DIY diagnostic methods

Crankshaft position sensor (DPKV) on Nissan Sunny (especially models B14/B15 with engines GA14DE/GA16DE/SR20DE) is a critical element of the engine management system. Its malfunction leads to malfunctions of the engine: from unstable idling to complete failure to start. Unlike temperature or air flow sensors, DPKV does not have backup systems - if it fails, the ECU loses synchronization with the crankshaft, which makes further operation of the vehicle impossible.

In this article we will analyze unique features of DPKV diagnostics on Nissan Sunny, including specific errors (for example, P0335 - sensor circuit malfunction), which are often confused with problems with the timing belt or ignition coils. You will learn how to test the sensor without dismantling (using a scanner and multimeter), as well as what original articles and analogues are suitable for replacement. We will pay special attention to typical testing errors - for example, why a winding resistance test can give a false positive result on a cold motor.

Signs of a faulty crankshaft sensor on a Nissan Sunny

Symptoms of DPKV failure on Nissan Sunny often disguised as other problems: fuel pump malfunctions, clogged injectors or failed ignition coils. However there is specific signs, which directly point to the sensor:

• 🔴 Engine won't start (the starter turns, but there is no spark and no fuel injection) - the most obvious symptom. In this case, the dashboard may light up CHECK ENGINE.
• 🔥 Detonation during acceleration (especially on engines SR20DE): The ECU loses synchronization and produces a spark at the wrong moment.
• 📉 Floating speed at idle (from 500 to 1500 rpm) - often accompanied by an error P0336 (incorrect DPKV signal).
• ⚡ Power Loss above 3000 rpm: the engine “stalls”, as if the cut-off is triggered, although the gas pedal is pressed.
• 🔄 Spontaneous engine stop when driving, after which starting is possible only after 5–10 minutes (the sensor overheats).

On Nissan Sunny B15 with the system ECCS (Electronic Concentrated Control System) faulty DPKV can cause immobilizer false alarm — The ECU blocks the start, mistakenly assessing the absence of a signal as an attempt to steal. In this case, the following message appears on the display of the on-board computer (if installed): KEY.

⚠️ Attention: If the engine SR20DE stalls while driving and does not start, but after 10-15 minutes it starts - it may not be DPKV, but ECU overheating (located under the glove compartment). Check the control unit cooling fan!

Where is the crankshaft sensor located on Nissan Sunny?

On all modifications Nissan Sunny (including B13/B14/B15) DPKV is installed in one place: on oil pump cover (at the front of the engine, next to the crankshaft pulley). Access to it is difficult due to the pipes and the generator, so to check or replace you will need:

• 🔧 Remove air filter (on engines GA14DE/GA16DE).
• 🔌 Disconnect the connector coolant temperature sensor (prevents crawling).
• 🔩 Unscrew generator mounting bolt (on SR20DE) for convenience.

The photo below shows the exact location of the DPKV on Nissan Sunny B14 (engine GA16DE):

Photo of the location of the DPKV on the Nissan Sunny

The crankshaft sensor is located to the right of the pulley (when viewed in the direction of travel), next to the oil filter. It is secured with one 10 mm bolt and has a two-pin connector with a locking mechanism. Wire color: black with a white stripe (signal) and green (ground).

Important: on engines SR20DE (installed on Sunny GTi) DPKV has other article — 23731-4M200, whereas on GA-series used 23731-4M000. They are similar in appearance, but have different winding resistance!

Methods for checking the crankshaft sensor on a Nissan Sunny

Yes 5 reliable methods Diagnosis of DPCV, from simple to complex. It is recommended to start with a visual inspection and error checking with a scanner, and end with a test with an oscilloscope (if you have access to equipment).

1. Checking errors with a scanner (ELM327, Launch, Autocom)

Connect the diagnostic scanner to the connector OBD-II (located under the steering wheel, to the left of the brake pedal). For Nissan Sunny The following error codes related to DPKV are relevant:

Error code	Description	Probable Cause
P0335	Crankshaft position sensor circuit malfunction	Wire break, contact oxidation, short circuit
P0336	DPKV signal range/performance out of normal range	The sensor itself is faulty or the drive disk is damaged
P0337	Low sensor signal level	Sensor contaminated with metal shavings, large gap
P0338	High sensor signal level	Short circuit at +12V or ECU malfunction

If the scanner shows an error P0335, but the sensor is visually OK - check wiring from DPKV to ECU (connector E30 on the control unit). Often the problem lies in frayed wires near the exhaust manifold.

2. Checking the winding resistance with a multimeter

This is a basic test that can be performed without removing the sensor. To do this:

1. Disconnect the connector from the DPKV.
2. Set the multimeter to resistance measurement mode (range 200–2000 Ohm).
3. Connect the probes to the sensor contacts (polarity is not important).

Normal resistance values for Nissan Sunny:

• Engines GA14DE/GA16DE: 830–970 Ohm.
• Engines SR20DE: 750–850 Ohm.

⚠️ Attention: If resistance 0 ohm (short circuit) or ∞ (break) - the sensor must be replaced. However normal resistance does not guarantee performance! The sensor may produce a weak signal due to internal damage to the magnet.

Disconnect the sensor connector|Check the winding resistance|Measure the supply voltage (pin 2, +12V)|Ring ground (pin 1, resistance to the body < 1 Ohm)|Check the circuit for a short circuit (between the contacts and the body)-->

3. Checking inductance (for advanced)

If you have LC meter or a multimeter with an inductance measurement function, you can check this parameter. Normal value for DPKV Nissan Sunny: 200–400 mH. A deviation of more than 20% indicates a malfunction.

An alternative method is to test with oscilloscope (more details in the next section). If the inductance is normal, but there is no signal, the problem may lie in master disk (ring gear on the crankshaft). On SR20DE Sometimes the teeth wear out, which leads to signal misses.

4. Diagnostics with an oscilloscope (the most accurate method)

An oscilloscope allows you to see waveform DPKV in real time. To check:

1. Connect the oscilloscope probe to the signal wire of the sensor (black with white stripe).
2. Start the engine (or crank the starter).
3. Compare the waveform with the reference one (see below).

A normal signal should have:

• 📊 Amplitude not less than 0.5 V (at idle).
• 🔄 Clear peaks on each tooth of the drive disk (without gaps).
• 📏 Same pulse width (deviation no more than 10%).

An example of an oscillogram of a working DPKV

The normal signal has a sinusoidal shape with sharp peaks at each tooth of the disk. The amplitude at idle is 0.7–1.2 V, the frequency is proportional to engine speed. If the sensor malfunctions or there is a large gap, the amplitude drops below 0.3 V, and the shape becomes “blurred”.

5. Replacement with a known-good sensor

If previous tests did not give an unambiguous result, the most reliable way is to temporarily install obviously working DPKV (you can take a used one from disassembly). If the symptoms disappear, your sensor is faulty.

When replacing, pay attention to:

• 🔧 Gap between sensor and drive disc: must be 0.5–1.5 mm. On SR20DE adjustable with washers.
• 🧲 Cleanliness of contacts: Oxidation or corrosion causes signal loss.
• 🔄 Wire integrity: often rubs against the generator bracket.

Typical mistakes when checking DPKV on a Nissan Sunny

Many car owners allow critical errors when diagnosing the sensor, which leads to unnecessary replacement of serviceable parts. Here are the most common:

• 🔌 Checking resistance on a hot engine: When heated, the winding resistance increases by 10–15%, which can be misleading. Always test on a cold engine!
• 🔧 Ignoring Gap: Even a working sensor will not work if the gap to the drive disk exceeds 1.5 mm. On SR20DE This is a common problem after replacing the oil pump.
• 📊 Diagnosis only by error P0335: this code may appear when the wire from the DPKV to the ECU is broken (contact E30-17 on the control unit). Always check the chain!
• 🔄 Replacing the sensor without checking the master disk: on engines with a mileage of more than 200 thousand km, the teeth on the crankshaft crown are often worn out, which simulates a malfunction of the DPKV.

One more hidden problem — incompatibility of analogues. For example, sensors from Nissan Primera P11 (article 23731-4M010) are identical in appearance to the original for Sunny, but have a different resistance (600–700 Ohm), which leads to an error P0336.

Which crankshaft sensor should I choose to replace?

For Nissan Sunny Both original sensors and high-quality analogues are suitable. The main thing is to comply resistance compatibility and designs. Below is a table of tested options:

Engine	Original article	Analogs (brand + article)	Notes
GA14DE/GA16DE	23731-4M000	Hitachi EX-100, Denso 550-0103	Resistance 830–970 Ohm
SR20DE	23731-4M200	Mitsubishi MD340423, Bosch 0 261 210 115	Resistance 750–850 Ohm, different connector!
CD20 (diesel)	23731-ED000	Valeo 583033	Only for diesel versions Sunny

When purchasing, pay attention to country of origin: original sensors Nissan produced in Japan (labeling Made in Japan), while analogues from China (Febi, Meyle) often have a defective magnetic core.

Average cost:

• Original: 2500–3500 rub.
• High-quality analogue (Hitachi/Denso): 1200–1800 rub.
• Budget analogue (Febi, Era): 500–900 rub. (risk of defects ~20%).

What to do if after replacing the DPKV the problem remains?

If the engine does not start or continues to run rough after installing a new sensor, check the following points:

1. Connection polarity: on Nissan Sunny reversed wires (signal and ground) result in inverted signal and error P0336.
2. Wiring integrity: use a multimeter to test the wires from the DPKV to the ECU (contact E30-17 on the block). The resistance should be close to 0 ohms.
3. Master disk: Inspect the ring gear on the crankshaft (through the inspection window in the clutch housing). Chipped or worn teeth lead to missed signals.
4. ECU: If all previous checks have failed, the control unit itself may be faulty (especially on SR20DE with the system ECCS).

On engines GA16DE after replacing the DPKV it may be necessary reset ECU adaptations. To do this:

1. Disconnect the battery terminal for 10 minutes.
2. Plug it back in and start the engine.
3. Let it idle for 5-10 minutes (the ECU will relearn).

FAQ: Frequently asked questions about DPKV on Nissan Sunny

Is it possible to drive with a faulty DPKV?

No. The crankshaft sensor is the only element without which the engine won't work. Unlike an oxygen sensor or mass air flow sensor, it is impossible to do without DPKV: the ECU will not be able to determine the position of the crankshaft and synchronize injection and ignition.

Why did the Nissan Sunny stop starting after washing the engine?

Most likely, water got into the DPKV connector or onto the ECU contacts. Dry the sensor with a hairdryer (not hot air!) and treat the contacts contact lubricant (For example, CRC 2-26). If the problem persists, check the sensor with a multimeter.

What gap should be between the DPKV and the drive disc?

Optimal clearance for Nissan Sunny: 0.5–1.5 mm. On engines SR20DE it is adjusted with washers under the sensor. If the gap is more than 2 mm, the signal amplitude drops and the ECU does not recognize the pulses.

Is it possible to clean the DPKV if it is dirty?

Yes, but only in-place method. Wipe the end of the sensor (which faces the crown) with a cotton swab soaked in isopropyl alcohol. Do not use acetone or gasoline - they will destroy the plastic casing. If metal shavings have accumulated inside the sensor, it will have to be replaced.

Why did the new DPKV quickly fail?

Common reasons:

• 🔌 Short circuit in the circuit (check the wiring from the sensor to the ECU).
• 🧲 Metal shavings (worn out engine or faulty oil pump).
• 🔥 Overheating of the sensor (if it is installed too close to the exhaust manifold).

On SR20DE also check crankshaft damper condition — its destruction leads to vibrations that kill the DPKV.