Owners Nissan Almera G15 (2012–2019 model years) are often faced with the need to replace the standard radio with a more modern one or restore the functionality of the audio system after repair. The main problem with this is the correct connector pinout, which differs from standard ISO diagrams and requires precise wire matching. Errors here can result in a short circuit, failure of the control unit, or even a fire in the cabin.

In this article you will find detailed pinout diagram for Almera G15 indicating the colors of the wires, their purpose and connection features. We will analyze both the standard radio connector and adapters for installing devices from Pioneer, Sony or JVC. Special attention is paid hidden contacts for controlling steering wheel buttons and antenna, which are often ignored during self-installation, which leads to loss of functionality.

Standard radio connector Nissan Almera G15: general appearance and features

Head unit Almera G15 connects via dual ISO connector (type Nissan 10+6 pin), where:

  • 🔌 Main connector (10 pins) — responsible for power supply, speakers and antenna.
  • 🔌 Additional connector (6 pins) — controls the steering buttons, CAN bus and backlight.

Feature Almera G15 — availability CAN buses (contacts A6 And A10 in an additional connector), which transmits data about the state of the car (speed, engine speed) for the correct operation of the audio system. When replacing the radio with a non-standard one, this signal is often lost, which leads to errors on the display or failure of the steering buttons.

⚠️ Attention: If, after installing a new radio, the message appears on the display "Check SW" — the problem is the lack of a signal from the CAN bus. Solved by installation CAN adapter (For example, Connects2 CTNI002).

The table below shows the basic pinout main connector (10 pin):

Contact Wire color Purpose Notes
A1 Yellow +12V (constant) Power supply for the radio's memory (clock, settings).
A2 Red +12V (ignition) Activated when turning the key. Responsible for turning on the radio.
A3 Black Ground (GND) A general minus for power and speakers.
A4 Green Right front speaker (+) Polarity is important for correct sound.
A5 Green-black Right front speaker (−) Speaker negative wire.
📊 What radio do you plan to install in Almera G15?
  • Standard (original)
  • Pioneer
  • Sony
  • JVC
  • Chinese 2DIN
  • Another

Speaker pinout: wire colors and polarity

B Nissan Almera G15 used 4 speakers (one for each door), connected through the main connector. It is important to comply polarity, otherwise the sound will be muffled or with phase distortion. Below is the complete connection diagram:

  • 🔊 Front left speaker:
    • White - plus (+)
    • White-black - minus (−)
  • 🔊 Front right speaker:
    • Green - plus (+)
    • Green-black - minus (−)
  • 🔊 Rear left speaker:
    • Gray - plus (+)
    • Gray-black - minus (−)
  • 🔊 Rear right speaker:
    • Purple - plus (+)
    • Purple-black - minus (−)

To check polarity, use multimeter in DC voltage measurement mode (DC 20V): connect the probes to the speaker wires and briefly supply power to the radio. If, when you turn on music, the voltage jumps in the positive direction, the polarity is correct.

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If after connection the sound “wheezes” or there is no bass, check the grounding of the radio. Often the problem lies in poor contact of the black wire (GND) with a car body.

Additional connector (6 pin): CAN bus, steering buttons and backlight

Second connector (6 pin) is responsible for integration with on-board network car. Here are located:

  • 🚗 CAN-High (A6, Orange-green) — data line.
  • 🚗 CAN-Low (A10, Orange-white) - second line of the CAN bus.
  • 🎛️ Steering wheel controls (A4, Brown).
  • 💡 Backlight (A5, Red with black stripe) - adjusts the brightness of the display depending on the lighting.

When replacing the radio with a non-original one CAN bus and steering wheel buttons stop working. Solutions:

  1. Install CAN adapter (For example, Pacific CAN-PS or Connects2).
  2. Connect steering buttons via resistor adapter (if the radio supports analog input).
  3. Flash the radio under Almera G15 (valid for some models Pioneer).
What happens if you ignore the CAN bus?

If there is no signal from the CAN bus, the radio may:

- Display error "No CAN" or "Check SW".

- Do not respond to commands from the steering wheel buttons.

- Switches off automatically when driving (due to lack of speed signal).

- Does not work correctly with Bluetooth (for example, does not connect to the phone automatically).

Connecting the Antenna and Accessory Devices

Antenna in Almera G15 connects via coaxial connector (DIN plug) on the main unit of the radio. However, there are nuances:

  • 📡 Antenna amplifier (A9, Blue) — supplies +12V for the active antenna. If the radio does not support this wire, the antenna will work poorly.
  • 📱 AUX input — in the standard radio it is implemented via 3.5 mm jack in the glove compartment. When replacing it with a non-original radio, it will have to be connected separately.
  • 🔌 USB - not included in the basic configuration. To connect, you need to pull the wire from the radio to the center console.

If after installing a new radio The radio reception is bad, check:

  1. Is it connected? blue wire (A9) to +12V.
  2. Integrity of the antenna cable (often frays in the corrugation of the door).
  3. Region settings in the radio menu (for Russia - Eastern Europe).

- Test the antenna cable with a multimeter for a break

- Make sure there is +12V on the blue wire (A9)

- Check the integrity of the DIN connector

- Set up the reception region in the radio menu

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Common connection mistakes and how to avoid them

Even experienced auto electricians make mistakes when pinouting the radio. Almera G15. Here are the most common:

  1. Confused +12V constant And +12V ignition:

    If you connect yellow wire to the ignition, the radio will reset when the key is turned off. If you mix it up the other way around, the device will not turn off, which will drain the battery.

  2. Ignoring speaker polarity:

    If connected incorrectly (+ to −) the sound becomes “flat”, the bass disappears. Check the polarity with a multimeter!

  3. Lack of grounding:

    Black wire (GND) must be securely screwed to a metal part of the body. Poor contact results in hum in the speakers.

  4. Connection without CAN adapter:

    Without a signal from the CAN bus, the radio may not see the steering buttons or display errors.

⚠️ Attention: If after connecting the radio won't turn on, check the fuse F30 (10A) in the fuse box under the hood. It is responsible for the audio system circuit and often burns out if there is a short circuit.

Step-by-step instructions for replacing the radio

To replace the standard radio with a non-original one, follow this algorithm:

  1. Disconnect the battery:

    Remove the negative terminal to avoid short circuit.

  2. Remove the decorative panel:

    Use a flathead screwdriver to pry up the plastic frame around the radio (start from the bottom right corner).

  3. Remove the standard radio:

    Unscrew the 4 screws in the corners and carefully pull out the device, disconnecting the connectors.

  4. Connect adapters:

    Use ISO adapter for connecting power and speakers, as well as CAN adapter (if you need support for steering wheel buttons).

  5. Install a new radio:

    Secure it in the slide and connect the connectors. Check the work before final assembly.

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When installing a radio with a screen (2DIN), the panel will need to be modified - in Almera G15 The standard seat is designed for 1DIN devices. Use a transition frame (eg Metra 99-7502).

FAQ: answers to frequently asked questions

Is it possible to connect a radio without a CAN adapter?

Technically yes, but you will lose:

  • Control from steering wheel buttons.
  • Automatic on/off when turning the key.
  • Correct display of information on the display (may show errors).

For full operation adapter required.

Which fuse controls the radio?

In the fuse box under the hood it is F30 (10A). Also check F28 (15A), responsible for the cigarette lighter - sometimes the radio is connected to this circuit.

Why do the speakers not work after replacing the radio?

Possible reasons:

  • Incorrect connection polarity.
  • Broken wires (check with a multimeter).
  • The output to the speakers is disabled in the radio (go to settings Audio → Speaker Level).
How to connect a rear view camera?

B Almera G15 There is no standard connector for the camera. You will need:

  1. Lay the video cable from the trunk to the radio.
  2. Connect the plus of the camera to the wire reverse (usually green-yellow in the fuse box).
  3. Activate the function in the radio Rear Camera.
Where can I buy connection adapters?

Recommended adapters:

  • ISO adapter: Nissan to ISO (For example, XC-NI10).
  • CAN adapter: Connects2 CTNI002 or Pacific CAN-PS.
  • Frame for 2DIN: Metra 99-7502.

You can buy it at auto electronics stores (AutoSpets, ChipTuning) or on AliExpress.