Nissan Teana J31 radio pinout: connectors, wire colors and connection diagrams

Nissan Teana J31 (2003–2008) - a car that is still in demand due to its reliability and comfort. However, the standard audio system is often inferior to modern requirements: there is no support Apple CarPlay, Android Auto, and the sound quality leaves much to be desired. Replacing the radio with an after-market solution (for example, Pioneer, Sony or Alpine) requires knowledge connector pinoutsto avoid connection errors.

In this article you will find full pinout diagram for the head unit Teana J31 indicating the colors of the wires, their purpose and features of connection to the on-board network. We'll look at:

• 🔌 Standard connectors and their location.
• 🎵 Acoustic outputs (front/rear speakers, subwoofer).
• ⚡ Power and Control (ACC, constant +12V, CAN bus).
• ⚠️ Common mistakes and how to avoid them.

Standard connectors for the Nissan Teana J31 radio: where they are and what they look like

B Teana J31 There are two main connectors used to connect the radio:

• 🔲 Connector A (20-pin) — the main one, responsible for power supply, speakers and control.
• 🔳 Connector B (12-pin) - optional, often used to connect a CD changer or external devices.

Both connectors are located on the rear panel of the radio. Depending on the vehicle equipment, the connector B may be missing (in basic versions). Important: Nissan uses a non-standard pinout, so direct connection to an aftermarket radio without an adapter is impossible.

For convenience, below is a photograph of the connectors (rear view of the radio):

Photo of Teana J31 radio connectors (clickable)

On the rear panel of the radio there is connector A (wide, 20 pins) on the left, connector B (narrow, 12 pins) on the right. The colors of the wires may differ depending on the year of manufacture, but their purpose remains the same.

If you plan to install a new radio, you will need ISO adapter (For example, Metra 70-7551 or Connects2 CT23NI14). These adapters allow you to connect an aftermarket device without re-soldering the wires.

Pinout of connector A (20-pin): power, speakers and control

Connector A - the most important one, since power, speaker signals and control wires pass through it. Below is a table with pinouts and wire colors for Nissan Teana J31:

Contact number	Wire color	Purpose	Notes
1	Yellow	Constant +12V	Power supply for radio memory
2	Red	ACC (ignition)	+12V with ignition on
3	Black	Ground (GND)	General minus
4	Green/black	Right front speaker (+)	Polarity is important!
5	Green	Right front speaker (−)	Negative wire

The complete table with pinouts of all 20 contacts can be downloaded here (PDF). Please note: some versions Teana J31 The colors of the wires may differ, but their purpose remains the same. For example, blue wire with white stripe always responsible for ANT CONTROL (antenna control).

If you connect an aftermarket radio, it is important do not confuse power wires:

• 🔋 Yellow — constant +12V (for settings memory).
• 🔑 Red — +12V when the ignition is on (ACC).
• ⚫ Black - ground (must be connected to the body!).

Pinout of connector B (12-pin): additional functions

Connector B in Teana J31 It is used less often, but it is important for connection:

• 💿 CD changer (in complete sets with a 6-disc player).
• 📡 External antenna or amplifier.
• 🔄 CAN buses (for integration with on-board computer).

Below are the key contacts of the connector B:

Contact number	Wire color	Purpose
1	Orange	CAN-High
2	Orange/black	CAN-Low
6	Purple	CD changer control
10	Gray	AUX input (left channel)

If you don't plan to use CAN bus (for example, when installing a simple radio without integration with the steering wheel), wires CAN-High And CAN-Low can be left unconnected. However, for radios with support steering wheel buttons (For example, Pioneer AVH-X5800DAB) will be required CAN adapter (For example, Pac SWI-RC).

Connecting speakers: polarity and features

B Teana J31 A standard speaker connection scheme is used, but there are some nuances:

• 🔊 Front speakers: 4 wires (2 per speaker: + And −).
• 🔊 Rear speakers: similar, but the wires may be thinner.
• 🔊 Subwoofer (if any): connected via a separate amplifier (wires gray And grey/black).

It is important to comply polarity:

• ✅ Correct connection: + to +, − to −.
• ❌ Error: Reversed polarity will result in phase shift and deterioration of the sound (the bass will “disappear”, the voice will become dull).

To check polarity you can use multimeter:

1. Set the multimeter to DC voltage test mode (DC 20V).
2. Connect the probes to the speaker wires.
3. Play a signal (such as a bass note) briefly.
4. If the voltage "jumps" in +, the polarity is correct.

Common connection mistakes and how to avoid them

Even experienced car owners make mistakes when replacing a radio. Here are the most common:

⚠️ Attention: If after connecting a new radio appliances stopped working (speedometer, tachometer), you most likely have shorted CAN-High or CAN-Low to mass. Immediately turn off the power and check the wires!

Error 1: Power short circuit

Symptoms: fuse F30 (10A) in the fuse box burns out when the radio is turned on.

Solution: Check if they are shorted yellow (+12V) and black (mass) of the wire. Use a tester to check the circuit.

Error 2: No sound from speakers

Reasons:

• 🔌 Unconnected speaker wires.
• 🔊 Reversed polarity (see section above).
• 🎛 Unactivated amplifier output (if available).

Error 3: The radio does not turn on

Possible problems:

• ⚡ Missing ACC (red wire).
• 🔋 Permanent connection not connected +12V (yellow wire).
• ⚫ Poor ground contact (black wire).

What should I do if the radio turns on, but immediately turns off?

This problem is often associated with unstable nutrition. Check:

1. Quality of contact in the connector ACC.

2. Presence of oxidation on the wires.

3. Fuse condition F30 (10A) in the fuse box (located under the steering wheel, on the left).

If the problem persists, try connecting the radio directly to the battery for a test.

Connecting an after-market radio: step-by-step instructions

To install a new radio (for example, Pioneer DMH-Z5350BT) follow these steps:

1. Disconnect the battery (remove the negative terminal).
2. Remove the stock radio:
   • 🔧 Use plastic pullers (for example, LISLE 38000).
   • 🔧 Press the latches on the sides of the panel.
3. Connect the adapter:
   • 🔌 Connect the connector A radios with adapter Metra 70-7551.
   • 🔌 Connect the ISO connector of the new radio to the adapter.
4. Check power:
   • ⚡ Connect the battery and check if the radio lights up.
   • 🎵 Turn on the ignition (ACC) and check the sound.

If the new radio has rear view camera output, connect it to the wire green/black (connector A, pin 18). To activate the camera when engaging reverse gear, use the wire purple/black (pin 19).

Integration with steering wheel buttons and CAN bus

B Teana J31 steering wheel audio control buttons work through CAN bus. To connect them to an aftermarket radio you will need:

1. CAN adapter (For example, Pac SWI-RC or Connects2 CTNI23).
2. Programming the adapter for your radio model (instructions are included with the adapter).
3. Connecting wires:
   • 🔌 CAN-High (orange) → adapter.
   • 🔌 CAN-Low (orange/black) → adapter.
   • 🔌 Key1 And Key2 (control wires) → radio.

After connecting, check the operation of the buttons:

• 🎵 Volume +/– — volume control.
• 🔀 Track ▶/◀ — switching tracks.
• 📞 Phone — activation of hands-free (if supported).

⚠️ Attention: If, after connecting the CAN adapter, the light on the dashboard lights up Check Engine, you have connected the wires CAN-High/CAN-Low in reverse polarity. Immediately turn off the power and swap the wires!

FAQ: Frequently asked questions about the pinout of the Nissan Teana J31 radio

Is it possible to connect an aftermarket radio without an adapter?

Technically possible, but it will be required re-solder the wires manually, which takes a lot of time and is prone to errors. Adapter (eg Metra 70-7551) is cheaper than electrical repairs after a short circuit.

Where is the fuse for the radio?

In the fuse box under the steering wheel (on the left). Look for the fuse F30 (10A) - it is responsible for powering the audio system. Also check F20 (15A) - it protects the circuit ACC.

Why does the climate control not work after replacing the radio?

This happens if you touch the wires CAN buses when connected. B Teana J31 The climate control and audio system share a common bus. Check the integrity of the wires CAN-High And CAN-Low.

How to connect a subwoofer to a standard radio?

The standard radio does not have a linear output to the subwoofer. Solutions:

1. Use high level input amplifier (connect to the rear speaker wires).
2. Install linear converter (For example, AudioControl LC2i).
3. Replace the radio with an aftermarket one with RCA outputs.

Where can I buy an adapter to connect a new radio?

Adapters Metra 70-7551 or Connects2 CT23NI14 can be found:

• 🛒 In auto electronics stores (AutoSpetsCenter, ChipTuning).
• 🌍 On AliExpress (search by article).
• 🛠 In audio system installation services (often sold with installation).