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Heineken's Garage

  1. Gauge Cluster - Bulb Replacement

    Introduction

    Around the 100.000 to 150.000 km range the first illumination and indicator bulbs in the Gauge Cluster start to fail. Replacing individual bulbs isn't economical considering the effort to get the cluster out of the car. Replacing all bulbs is the preferred route (except for AT vehicles - which will be explained below).

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    JDM 1997 AT Cluster

    All bulbs can be replaced without disassembling the cluster, except ...

    Updated 06-11-2021 at 06:42 PM by Heineken

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    Member's Blogs
  2. 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 ...
  3. 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)
      One pair of transistors connects one pin of the speaker to either GND or VBAT. The IC U2 ensures that two opposing transistors are never conducting
    ...

    Updated 24-03-2021 at 06:02 AM by Heineken

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    Technical Information
  4. Airbag (SRS) - Capacitor Replacement

    Introduction
    The Supplementary Restrain System (SRS) ECU suffers from ageing capacitors the same way as many other ECUs in the NSX. Two things makes it a special issue: The SRS is a safety device and a permanently lit warning light means failing the regular vehicle checks in most countries.
    Especially the first generation ECUs (cars with only a driver's Airbag) tend to fail by shorting an important MOS-FET inside the housing which complicates repairs.

    Diagnostic
    Due ...

    Updated 21-02-2021 at 03:49 PM by Heineken

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    Technical Information
  5. Speaker - Capacitor Replacement

    Introduction
    Each of the NSX's active speakers contain an amplifier module. Similar to most of the Electronic Control Units (ECUs) in the car, the capacitors in these modules tend to fail by leaking electrolyte. Especially the first generation of amplifiers (they can be identified by at least one small green capacitor) are known to leak early (sometimes after less then ten years) and resulting in most NSX having their amplifiers replaced at least once.
    Modules with heavy leakage may ...

    Updated 16-07-2021 at 07:53 PM by Heineken

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    Technical Information
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