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Thread: ECU speed signal resistor ohms

  1. #1
    Join Date
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    ECU speed signal resistor ohms

    Hi, I have been restoring my 1990 Range Rover Classic with a 3.9V8 EFI. While tracing some wiring going to the coil, I came across a resistor that is wired into into the feed to the ECU (input 39) as engine speed signal from the negative terminal on the coil. The specifications state that it is a 6.8K ohm resistor. Mine is reading 7.42K ohms.
    Does anyone know what effect if any this would have on the ECU?

    Cheers
    Geoff

  2. #2
    Join Date
    Dec 2014
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    FNQ
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    it's within a 10% tolerance for a 6.8KΩ resistor.

    the actual resistance of a 6.8kΩ ± 10% resistor will have its value as being read somewhere between 6.12kΩ and 7.48kΩ.
    Roads?.. Where we're going, we don't need roads...

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