Mass air flow sensor (MAF) in Nissan Sunny - a key element of the injection system, on which the correct operation of the engine depends. Malfunctions of this sensor lead to floating speed, increased fuel consumption and even failure to start the engine. But before replacing or repairing, you need to understand exactly how its electrical part works - and this requires pinout.

In this article we will analyze in detail the connection diagram of the mass air flow sensor on Sunny B14 And B15 (including versions with engines GA14DE, GA16DE, QG15DE And QG18DE). You will learn which wires are responsible for what, how to check the sensor with a multimeter, and what errors indicate its malfunction. And also - unique pinout nuances for models with the system ECCS and without her, which are often missed even by experienced craftsmen.

What is a mass air flow sensor and why is its pinout important?

Mass air flow sensor (or MAF-sensor — Mass Air Flow) measures the amount of air entering the engine and transmits the data to the ECU. Based on them, the control unit adjusts the composition of the air-fuel mixture. If the sensor lies or does not work, the engine begins to “chop” or “overeat” gasoline.

DMRV pinout Nissan Sunny - this is a diagram of connecting its contacts to the on-board network. Knowledge of pinouts is needed for:

  • 🔧 Diagnostics — checking voltage and resistance at the terminals.
  • 🔌 Repair - if the wires or connector are damaged.
  • 📊 Chip tuning — when flashing the ECU for another sensor.
  • 🚗 Installations of non-standard mass air flow sensor (for example, from Nissan Almera N16).

On Sunny Two types of sensors were installed: analog (with frequency signal) and digital (with tire CAN). Their pinouts are different, so before work you need to accurately identify the model of your mass air flow sensor.

📊 What engine does your Nissan Sunny have?
  • GA14DE/GA16DE
  • QG15DE/QG18DE
  • Other (specify in comments)
  • I don't know

DMRV pinout diagram for Nissan Sunny B14/B15

On most Sunny (especially with engines GA14DE/GA16DE) a 5-pin MAF connector is used. Below is the standard pinout for analog sensors Hitachi And Bosch (articles: 22680-4M000, 22680-4M005, 22680-5M000):

Contact number Wire color Purpose Voltage (V)
1 Yellow Power supply (+12V from ignition relay) 11.5–14.5
2 Green/Black Weight (body) 0
3 Gray Output signal (to ECU) 0.5–4.5
4 White/Black Air temperature (input from IAT sensor) 0.1–4.9
5 Red/Black Feedback (for self-diagnosis) 5.0

⚠️ Attention: On models with the system ECCS (For example, Sunny B15 2000–2004) contact №5 may be sealed or missing. In this case, a 4-pin connector is used, where the air temperature signal goes through a separate wire to the ECU.

To check the pinout on your car:

  1. Remove the connector from the mass flow sensor (latch at the top, push and pull).
  2. Turn on the ignition (without starting the engine).
  3. Ring the contacts with a multimeter in the mode DC 20V.

Pin 1: +12V (power)|Pin 2: 0V (ground)|Pin 3: 0.5–4.5V (signal)|Pin 4: 0.1–4.9V (temperature)|Pin 5: 5V (feedback if any)-->

How to check the mass air flow sensor with a multimeter using pinout

Diagnostics of mass air flow sensor on Nissan Sunny starts with measuring the voltage at contact 3 (gray wire). To do this:

  1. Connect negative probe multimeter to ground (pin 2 or body).
  2. Positive probe insert into pin 3 connector (via a pin or thin wire).
  3. Turn on the ignition (do not start the engine).

Normal indicators:

  • 🟢 0.9–1.1V - the sensor is OK.
  • 🟡 1.1–1.3V — the resource is coming to an end (quick replacement).
  • 🔴 1.3V and above — malfunction (needs replacement or cleaning).
  • ⚫ 0V or 5V - open circuit or short circuit.

If the voltage is outside the normal range, check:

  • 🔋 Food (pin 1): should be 11.5–14.5V.
  • 🌡️ Temperature sensor (pin 4): at +20°C ~ 2.3–2.7V.
  • 🔌 Wiring integrity from the mass air flow sensor to the ECU (continuity test for open circuit).
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If the voltage on pin 3 floats (for example, jumps from 1.0V to 1.5V), the problem may be in the oxidized contacts of the connector. Try to clear them contact fluid (For example, CRC 2-26) and repeat the measurement.

Common DMRV errors and their interpretation

Malfunctions of the mass air flow sensor on Nissan Sunny are accompanied by errors that can be considered a scanner (for example, ELM327) or through self-diagnosis (closing contacts in the diagnostic connector). Basic codes:

Error code Description Probable Cause
P0100 MAF circuit malfunction Broken wire, oxidation of contacts, incorrect pinout
P0102 Low MAF signal level Contamination of the sensing element, sensor malfunction
P0103 High level of MAF signal Short circuit at +12V, damage to the sensor board
P0115 Air temperature sensor circuit malfunction Problems with pin 4 or the thermistor itself

⚠️ Attention: Error P0100 may appear not only due to the mass air flow sensor, but also due to problems with wiring from the ECU to the sensor. Before replacing the mass air flow sensor, check the integrity of the harness in the area injector harness And ECU connector — the wires often fray there.

If the scanner shows an error P0102 or P0103, but visually the sensor is clean, try reflash the ECU to standard firmware. Sometimes failures occur after unsuccessful chip tuning, when the mass air flow sensor calibrations are lost.

How to reset MAF errors without a scanner?

On Nissan Sunny B14/B15 You can reset errors through self-diagnosis:

1. Turn off the ignition.

2. Close the contacts 1 And 8 in the diagnostic connector (under the steering wheel).

3. Turn on the ignition - lamp Check Engine will start flashing.

4. Wait 5 seconds and remove the jumper.

5. Turn off the car and start it again - the errors will be reset (if the problem is resolved).

Cleaning and repairing the air flow sensor: what you can do yourself

If the sensor is dirty, but not yet “dead,” you can try cleaning it. To do this:

  1. Remove the mass air flow sensor (unscrew the 2 bolts on 10 mm and disconnect the connector).
  2. Disassemble the case (carefully pry off the latches with a screwdriver).
  3. Clear sensing element (film or thread) alcohol solution or a special cleaner (for example, Liqui Moly Luftmassensensor-Reiniger).
  4. Blow with compressed air and let dry.

⚠️ Attention: Do not use for cleaning:

  • ❌ Acetone or solvent - will damage the film.
  • ❌ Cotton buds - may leave lint.
  • ❌ High pressure compressor - risk of membrane damage.

If errors remain after cleaning, check sensor board for cracks or burnt resistors. On Sunny B15 often fails Zener diode 5V (labeling D1), which is responsible for feedback. It can be replaced with a similar one (for example, 1N4733A).

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Cleaning the air flow sensor helps in 60–70% of cases if the problem is caused by contamination. If the sensor “died” due to mechanical damage or wear, replacement is inevitable.

Replacing the mass air flow sensor on a Nissan Sunny: choosing an analogue and installation nuances

If the sensor cannot be repaired, it must be replaced. Original articles for Sunny:

  • 🔹 22680-4M000 - for GA14DE/GA16DE (1995–2000).
  • 🔹 22680-5M000 - for QG15DE/QG18DE (2000–2006).

Analogs (proven brands):

  • 🔧 Bosch 0 280 218 004 (fits most models).
  • 🔧 Hitachi AF10004 (original supplier for Nissan).
  • 🔧 Denso 197-6040 (universal, may require modification of the connector).

When installing a new mass air flow sensor:

  1. Check o-ring - if it has hardened, replace it (part no. 16517-4M000).
  2. Plug in the connector and make sure the latch locks into place.
  3. Reset errors (via scanner or self-diagnosis).
  4. Swipe throttle adaptation (if the engine QG18DE):
1. Заглушите двигатель.

2. Включите зажигание на 3 секунды.


3. 5 раз нажмите педаль газа до упора (интервал 1 секунда).


4. Подождите 7 секунд, затем нажмите педаль ещё раз и удерживайте 10 секунд.


5. Заведите двигатель (обороты должны стабилизироваться).

⚠️ Attention: On Sunny B15 with the system ECCS after replacing the mass air flow sensor it may be necessary ECU flashing, if the new sensor has a different calibration. Symptoms of incompatibility: floating speed at idle, jerking during acceleration.

Frequently asked questions about the Nissan Sunny mass air flow sensor

Is it possible to drive with a faulty mass air flow sensor?

Technically possible, but not advisable. The ECU will go into emergency mode using data from the sensors pressure And throttle position, but:

  • 🔥 Fuel consumption will increase by 20–30%.
  • 🚗 The dynamics will worsen (failures during acceleration).
  • 🔧 Risk of detonation and damage to the catalyst.

On Sunny B14 with GA16DE Ignoring the problem for a long time can lead to engine overheating due to incorrect mixture.

How to distinguish an original mass air flow sensor from a fake?

Signs of the original:

  • 🏷️ There is a marking on the body Nissan or Hitachi (not a sticker!).
  • 🔍 The sensing element has uniform color (fakes often have stains).
  • 🔌 The connector fits tightly, the contacts do not loosen.
  • 📦 Included o-ring with article number.

Counterfeits often have overvoltage on pin 3 (for example, 1.5V instead of 1.0V).

Why does the error not go away after cleaning the mass air flow sensor?

Possible reasons:

  • 🧹 The sensitive element is damaged (for example, the thread in the sensors is broken Bosch).
  • 🔌 Defective wire from pin 3 to ECU (check with a multimeter).
  • 🖥️ Failure in the ECU firmware (requires flashing or reset of adaptations).
  • 🌡️ Defective air temperature sensor (built into the mass air flow sensor).

On Sunny B15 may be required after cleaning idle training:

1. Сбросьте клемму АКБ на 10 минут.

2. Заведите двигатель и дайте поработать 5 минут на холостых.


3. Выключите зажигание на 10 секунд.


4. Повторите запуск — обороты должны стабилизироваться.

Is it possible to install a mass air flow sensor from another Nissan model?

Yes, but with reservations:

  • 🔄 From Nissan Almera N16 (22680-5M000) - suitable for Sunny B15 with QG18DE, but may be required modification of the connector (resoldering pins 4 and 5).
  • 🚗 From Primera P12 (22680-AL50A) - electrically compatible, but the body is longer (you need to bend the mount).
  • ❌ From X-Trail T30 — not suitable due to a different signal range.

Before installation necessarily compare the pinout and voltage on pin 3!

What symptoms indicate death of the air flow sensor?

Signs complete refusal sensor:

  • 🚨 Engine won't start (The ECU does not see the signal).
  • 🔥 Lamp Check Engine lights up constantly (error P0100).
  • 💨 Black smoke from the exhaust (over-enriched mixture).
  • 🔊 Claps in the muffler or air intake.

On Sunny B14 with GA16DE with a “dead” mass air flow sensor, the engine can start, but will only work at one or two injectors (strong vibrations).