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Technical Information

Functional and repair information

  1. Climate Control Unit (CCU) - Repair

    Introduction
    Failure of the Climate Control Unit (CCU) is a common fault, affecting nearly any NSX. In almost any case, capacitor replacement and track repair will fix all issues. Depending on the state of the PCB, further damage to other components can happen, though.

    Diagnostic
    The following error cases and ways of repairing have been identified so far. These faults can be caused by major acid leakage affecting nearby transistors.

    Click image for larger version. 

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    Updated 22-05-2022 at 04:07 PM by Heineken

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    Technical Information
  2. Gauge Cluster - Tester

    Introduction
    The NSX Gauge Cluster provides a large number of functions and displays, resulting in roughly 60 pins across two green connectors. Testing all of them manually is a error-prone task, requires special equipment and takes a lot of time. To speed things up, it helps to have a tester that provides all of these functions in a compact way and utilizing the original connectors.

    Requirements
    A simple user interface. Usage of the original connectors. Adaptable for multiple ...

    Updated 05-03-2022 at 07:51 PM by Heineken

    Categories
    Member's Blogs , Technical Information
  3. Gauge Cluster - Capacitor Replacement

    Introduction
    The Gauge Cluster suffers from ageing capacitors as many ECUs in the NSX do. Leaking capacitors at the gauge cluster is a serious issue. Acid near the warning indicator circuit causes shorts and even potentially lead to a fire. Same as with the other capacitor issues, a replacement should be considered before the unit fails.

    Diagnostic
    First signs are a non-accurate speed indication or a permanently lit brake light warning even though bulbs and wiring are ...

    Updated 30-03-2022 at 03:35 PM by Heineken

    Categories
    Member's Blogs , Technical Information
  4. Gauge Cluster

    Introduction
    The NSX's Gauge Cluster is a good example for a nice and simple design - it features a symmetric layout with one large dial on each side, accompanied by two small dials. These main functionalities are realized:

    • Speed dial (country specific labeling and range)
    • Tachometer (model specific range)
    • Temperature, oil pressure and fuel gauge
    • Shift indicator (AT only)
    • ~30 indicator lights (some model and country specific)


    Variations and Build ...
  5. Speaker - Repair

    Introduction
    Failure of the NSX active speakers is a common fault, especially for the early build years. The modules are class-D switching amplifiers with a MOS-FET driver bridge for low impedance (2 Ω) speakers. The amplifier can be divided into these main sections:

    • Output drivers (MOS-FET transistors) and Filter (coils)
      Transistors used are from either STMicroelectronics (ST) or International Rectifiers (I▽R) with the BOSE-internal part number 137110
      One
    ...

    Updated 20-03-2022 at 08:59 AM by Heineken

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    Technical Information
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