Upgrading your Acura NSX with a Pioneer head unit can significantly enhance your in-car audio experience. However, ensuring a correct wiring setup is crucial for optimal performance and to avoid potential issues. This guide provides a detailed Pioneer stereo wiring diagram specifically tailored for NSX models, along with troubleshooting tips for common installation challenges.
Wiring Diagram for Pioneer Head Unit in NSX
The following table outlines the correct wiring connections between the 16P connector on the NSX and a Pioneer head unit, using the SoS ipp-758 harness as a reference. This diagram is essential for a successful and clean installation.
| Terminal | Wire | Connects To | SoS ipp-758 | AVIC-8100NEX (Example) |
|---|---|---|---|---|
| A1 | WHT | Passenger’s door speaker amp + | Red RCA-Male (gray wire “Right Front+” ) | Front Right RCA-Female |
| A2 | WHT | Driver’s door speaker amp+ | Black RCA-Male (white wire “Left Front +”) | Front Left RCA-Female |
| A3 | Red/Blk | Lights-on signal (dash and console lights) | ORANGE (“Dash light illumination”) | Orange/White – pwr cord #1 |
| A4 | wht/yel | Constant power | YELLOW (“battery/constant 12v+”) | Yellow – pwr cord #1 |
| A5 | Yel/Red | ACC (II) main stereo power | RED (“ignition switch 12v+”) | Red – pwr cord #1 |
| A6 | Pnk/wht | Radio switch pwr (to antenna & relay) | BLUE (“power antenna”) | Blue/White(System Remote Control) – pwr cord #1 |
| A7 | WHT | Driver Foot well base speaker (+) | Black RCA-Male (green wire “Left Rear +”) | Left Rear RCA-Female |
| A8 | WHT | Passenger foot well base speaker (+) | Red RCA-Male (Purple wire “Right Rear +”) | Right Rear RCA-Female |
| A9 | ORN | Passenger door speaker amp (-) | Red RCA-Male (gray blk wire “Right Front -”) | Right Front RCA-Female |
| A10 | ORN | Driver door speaker amp (-) | Black RCA-Male (white blk wire “Left front -”) | Front Left RCA-Female |
| A11 | Orn/wht | cell phone mute signal (not applicable) | empty | N/A |
| A12 | blk/brn | Security (IN) – Not applicable | empty | N/A |
| A13 | blk/lt grn | Security ground (G404) | empty | N/A |
| A14 | blk | Ground | Black (“Chassis Ground 12V-”) | Black – pwr cord #1 |
| A15 | ORN | Driver Foot well speakers (-) | Black RCA-Male (green/blk wire “Left Rear -”) | Left Rear RCA-Female |
| A16 | ORN | Passenger foot well speaker(-) | Red RCA-Male (purple/blk wire “Right Rear – “) | Right Rear RCA-Female |
This diagram details the pinout for connecting your Pioneer head unit to the NSX’s wiring system, ensuring compatibility with the car’s speaker amplifiers and power sources. It is crucial to double-check each connection against this diagram during installation.
Troubleshooting Common Issues
After wiring your Pioneer stereo, you might encounter some common issues. Here’s how to address them:
Noise Issues: Turn On/Off Thump and Hissing
A common problem with aftermarket head unit installations is unwanted noise, such as a turn-on/off thump or constant hissing from the speakers. These issues can often be attributed to ground loops or impedance mismatches.
- Grounding: Ensure your Pioneer head unit is properly grounded to the car chassis. A poor ground connection is a primary cause of noise. Verify the ground wire is securely connected to a clean, unpainted metal surface.
- Noise Isolators: If grounding is correct and noise persists, consider using noise isolators like PAC SNI-1. These devices are installed inline with the RCA outputs and help break ground loops. While they can attenuate noise, they might not eliminate it entirely if the root cause is elsewhere.
- Root Cause Elimination: Investigate other potential noise sources. Check for interference from power cables running near audio signal cables. Ensure all connections are clean and secure.
Mounting Bracket Solutions
Securing your new Pioneer head unit in the NSX dashboard requires a suitable mounting bracket. Simply stuffing the unit into the slot without proper support is not ideal.
- Custom Mounting Plate: For a clean and secure install, a custom mounting plate might be necessary. Universal double DIN mounting brackets can sometimes be adapted, but a plate specifically designed for the NSX can provide a better fit and finish.
- SOS 2DIN Bracket Compatibility: The SoS 2DIN mounting bracket might not be universally compatible with all head units or NSX consoles. Research specific brackets known to work well with Pioneer units in the NSX or consider custom fabrication if needed.
Double DIN Slot Modification in SoS Center Console
If you’re modifying an SoS center console to accommodate a double DIN head unit, careful cutting is essential to avoid cracking or damage.
- Dremel Tool: A Dremel with a cutting wheel is a suitable tool for аккуратно cutting the console. Work slowly and in stages, rather than trying to remove too much material at once.
- Preventing Cracking: Use masking tape to outline the cut area and protect the surrounding console material. Consider using a plastic cutting blade for a cleaner cut and to minimize stress on the console material.
Aspirator Fan Mount
The aspirator fan is important for the NSX climate control system. If the SoS center console lacks an aspirator fan mount, you’ll need to devise a solution.
- Relocation/Custom Mount: Explore options for relocating the aspirator fan or creating a custom mount that integrates with the new head unit and console setup. Ensure the fan remains functional for proper climate control operation.
Ashtray Port Integration
For convenient access to ports like USB, HDMI, Microphone, and AUX, repurposing the ashtray slot is a popular modification.
- Custom Faceplate: To neatly integrate these ports, consider creating a custom faceplate that fits into the ashtray slot. This faceplate can house the necessary ports and provide a clean, factory-like appearance.
- Routing Cables: Carefully route the cables from the Pioneer head unit to the ashtray slot, ensuring they are hidden and do not interfere with the head unit’s operation or other vehicle components.
By following this wiring diagram and addressing these common installation challenges, you can successfully install a Pioneer stereo in your NSX and enjoy enhanced audio performance while maintaining a clean and professional look. Remember to always prioritize safety and double-check all connections during the installation process.
