Technical Information

Introduction
The Climate Control Unit (CCU) of the NSX suffers from aging capacitors the same way as many other ECUs in the vehicle. It's often the first ECU experiencing problems. It typically takes about 25 years to manifest itself but high temperature and humidity can cause issues to appear even earlier.
A capacitor replacement should be performed as a precautionary measure even if no problems have been observed yet.

Diagnostic
Typical symptoms are a cabin fan that ...

Introduction
The Climate Control Unit (CCU) of the NSX controls heating, cooling and ventilation of the passenger cabin. It utilizes several electrical sensors and actuators across the vehicle to do so:

Sensors

Actuators

...

The audio system of the Honda NSX consists of a center dash radio with three Bose active speakers and an optional CD-changer in the trunk. Even though the CD-changer was an option, the required cables were always installed.

JDM RHD Interior

The CD-changer's proprietary Alpine protocol (MBUS) was used across many Honda vehicles from 1991 to 2005. The company GROM (and others) have reverse-engineered it and are providing various ...

General information

The NSX's coolant tank is quite different from the coolant tanks used in Japanese high volume cars. In most of these vehicles the coolant system "breaths" into the coolant tank by pushing excessive coolant into the tank and sucking it back during cool-down. The cap of such a reservoir doesn't hold pressure and the tank is therefore not pressurized.

At the NSX the tank is part of the pressurized cooling system and therefore subject to much ...