Throttle valve in cars Nissan - a key component of the injection system, responsible for regulating the air flow into the intake manifold. Malfunctions in its operation lead to jerking, floating speed or switching on Check Engine with errors P0120, P0122 or P0123. To correctly diagnose the problem or connect a new inductor, you need to know connector pinout — purpose of each contact and color marking of wires.

In this article we will analyze pinout diagrams for popular models Nissan (including Qashqai J10/J11, X-Trail T31/T32, Juke F15 and others), we will explain how to check the signals on the contacts with a multimeter, and give typical mistakes when replacing. The information is relevant for gasoline engines with an electronic gas pedal (ETCS), where the throttle is controlled ECU via bus CAN or analog signal.

Why do you need a throttle valve pinout?

Knowing the pinout of the throttle valve connector is critical in three cases:

  • 🔧 Replacing the damper — to correctly connect the new node and avoid errors P0120 (position sensor circuit malfunction).
  • 🔍 Diagnostics — checking the voltage on the contacts will help distinguish a malfunction of the damper itself from problems with the wiring or the computer.
  • 📊 Chip tuning — when flashing the ECU, it may be necessary to disable or emulate throttle signals.

For example, if after replacing the damper with Nissan Qashqai 2.0 MR20DE caught fire Check Engine with an error P0122 (low sensor signal level), the problem may lie in incorrect connection of the contacts VTA1 And VTA2 (position sensor signals). Without a pinout diagram, you risk mixing up the wires or damaging the connector.

⚠️ Attention: On some models Nissan (For example, X-Trail T31 with QR25DE engine) the throttle valve has double connector - one for power and control, the other for position sensors. By mixing them up, you can burn out the throttle electronics or the ECU.

General pinout diagram for most Nissan models

Despite the differences in engines and generations, the throttle pinout of Nissan follows general logic. Below is a universal diagram for most gasoline engines (including HR16DE, MR20DE, QR25DE):

Contact Wire color Purpose Voltage (V)
1 Red (RED) Power supply +5V (from ECU) 4.8–5.2
2 Black (BLK) Weight (total) 0
3 Green (GRN) Position sensor signal 1 (VTA1) 0.3–4.7 (var)
4 Yellow (YEL) Position sensor signal 2 (VTA2) 0.3–4.7 (var)
5 Blue (BLU) Damper drive control 0–12 (PWM)

Important: on throttle valves with electronically controlled (for example, on Nissan Juke 1.6 HR16DE) contact 5 conveys PWM signal (pulse width modulation) from the ECU to open/close the damper. When diagnosing with a multimeter, you will see a jumping voltage from 0V to 12V.

📊 Which Nissan model are you diagnosing?
  • Qashqai
  • X-Trail
  • Juke
  • Murano
  • Other

Pinout for specific models

Although the general scheme is similar, there are nuances for different engines and generations. Below is detailed data for popular models.

Nissan Qashqai J10 (2007–2013) and J11 (2014–2021)

On Qashqai with engines MR20DE 2.0 And HR16DE 1.6 throttle valve is used Hitachi with 5-pin connector. Feature - contacts VTA1 And VTA2 may be interchanged depending on the year of manufacture:

  • 🔹 2007–2010: VTA1 - green, VTA2 - yellow.
  • 🔹 2011–2021: VTA1 - yellow, VTA2 - green (reverse polarity!).

On Qashqai J11 with MR20DD 2.0 Turbo the damper has 6-pin connector — a contact is added for the air temperature sensor (IAT).

How to distinguish a 5-pin damper from a 6-pin?

The 6-pin connector has an additional white wire (temperature sensor). There is also a marking on the damper body: 5-pin ones usually have a code 28570-XXXX, 6-pin - 28571-XXXX.

Nissan X-Trail T31 (2007–2013) and T32 (2014–2021)

On X-Trail T31 with QR25DE 2.5 the throttle valve has double connector:

  • 🔌 Main (4 pins): nutrition, weight, VTA1, VTA2.
  • 🔌 Additional (2 contacts): drive control (PWM).

Wire colors may vary depending on market (Europe/Japan). For example, in European versions VTA1 - green, and in Japanese - gray.

💡

Before disconnecting the throttle valve connector, X-Trail T32 Reset the negative terminal of the battery for 10 minutes. This will reset the ECU adaptations and avoid errors P0120 after connection.

Nissan Juke F15 (2010–2019)

On Juke with HR16DE And MR16DDT (turbo) damper is used Denso with 5-pin connector. Feature - contact 5 (drive control) can issue reverse polarity during diagnosis. If the multimeter shows -12V, this is normal - the ECU is testing the circuit.

How to check the throttle valve with a multimeter?

Throttle valve diagnostics include checking nutrition, sensor signals And control circuits. You will need a multimeter in DC 20V And resistance 200Ω.

Disconnect the damper connector|Check the +5V power supply between pins 1 and 2|Measure the resistance of sensors VTA1/VTA2|Check the PWM signal on pin 5 (with the ignition on)|Compare the readings with the reference ones (see table above)-->

Step 1: Check Power

Connect black dipstick multimeter to ground (contact 2), and red - to contact 1 (food). When the ignition is on, the voltage should be 4.8–5.2V. If less 4.5V — the problem is in the wiring or the ECU.

Step 2: Check position sensors (VTA1 And VTA2)

Connect the probes to the contacts 3 And 2 (mass), then 4 And 2. When the damper is closed, the voltage should be 0.3–0.7V, when open - 4.0–4.7V. If the values are outside the limits or do not change when the damper is opened manually, the sensor is faulty.

⚠️ Attention: On Nissan Almera N16 with engine QG18DE sensors VTA1 And VTA2 have reverse logic — when the damper is closed, the voltage is maximum (4.5V), when open - minimum (0.5V). Do not confuse with other models!

Step 3: Check the damper actuator

On contact 5 (control) must be present when the ignition is on impulse voltage (from 0V to 12V). If there is no voltage, check the fuse ECU-IG (usually 10A) and the chain is broken.

Typical errors and their causes

Errors related to the throttle valve often appear after replacing it, cleaning it, or having problems with the wiring. Let's look at the most common ones:

Error code Description Possible reason Solution
P0120 Throttle Position Sensor Circuit Malfunction Broken wire, oxidation of contacts, faulty sensor Check VTA1/VTA2, clean contacts
P0122 Sensor 1 signal low Short circuit to ground, sensor faulty Check the circuit for short circuit, replace the damper
P0123 Sensor 1 signal high Open circuit or short circuit to +5V Check the wiring from the ECU to the connector
P2101 Throttle actuator malfunction Problems with PWM signal, mechanical jamming Check contact 5, lubricate the mechanism

On Nissan Note E12 with HR16DE engine, error P0120 often occurs after cleaning the throttle body without resetting the ECU adaptations. In this case, it is necessary to perform a “training” procedure for the damper via a diagnostic scanner (for example, Launch X431) or manually:

  1. Reset the battery terminal for 10 minutes.
  2. Turn on the ignition (without starting the engine) for 3 seconds.
  3. Turn off the ignition for 10 seconds.
  4. Repeat steps 2-3 2 more times.

Frequently asked questions about pinouts and repairs

💡

Before replacing a throttle body, always compare the connectors of the old and new parts - even if the part numbers are the same, the pinout may differ (for example, on throttle bodies for the Japanese and European markets).

Is it possible to change the throttle body from a 5 pin connector to a 6 pin connector?

No, this will lead to errors P0120 And P0507 (high revs XX). 6-pin dampers have an additional air temperature sensor (IAT), which is missing in 5-pin. The ECU will not be able to process the signals correctly.

Why did jerking and error P0123 appear after cleaning the throttle body?

Most likely you have damaged resistive layer position sensors (VTA1/VTA2) when cleaning. Use only special throttle valve cleaner (For example, Liqui Moly Pro-Line Drosselklappen-Reiniger) and do not use mechanical cleaning (brushes, abrasives).

How to ring the wires from the ECU to the throttle valve?

Disconnect the ECU and throttle valve connectors. Using a multimeter in mode resistance 200Ω check the circuits:

  • 🔹 Contact 1 (power) → contact XX on the ECU (look for +5V REF in the diagram).
  • 🔹 Contact 3 (VTA1) → sensor contact on the ECU (usually marked as TP SEN1).

The resistance should be close to 0Ω (no break). If it shows OL - wire break.

Where can I find a pinout diagram for a specific Nissan model?

Official diagrams can be found in the manuals Nissan Service Manual (for example, on the website NicoClub). Alternative sources:

  • 📄 Electrical circuits in the program Mitchell1 or Autodata.
  • 📱 Mobile applications type CarScanner (there are pinout databases).
  • 🛠️ Forums (For example, Drive2 or Nissan Club Russia).

Conclusion: what to do if the pinout does not match?

If, when replacing the throttle valve, you find that the connector of the new part does not match the old one, there are three solutions:

  1. Check the article. For example, for Nissan Qashqai J10 2.0 MR20DE the original damper has an article number 28570-4M000, and for J11 — 28570-4M010. A difference in one character may mean a different pinout.
  2. Use an adapter. For some models (eg X-Trail T31) adapters from 5-pin to 6-pin connector are sold.
  3. Resolder the connector. If you are confident in your skills, you can resolder the wires according to the diagram. Be sure to insulate the connections with heat shrink!

Remember: incorrect connection throttle valve may cause wiring fire (due to short circuit) or ECU failure (if you apply +12V to the signal contacts). If in doubt, contact an electrician with experience working with Nissan.