Re: [928uk] It won’t start

[Paul R Smith]

It wouldn't do any harm to check, but the construction of the CPS is 
different from ABS sensors, I suspect that the metal part is not in 
contact with the bell-housing, and I have never heard of them failing by 
shorting to ground.

Smiffy

On 11/01/2022 17:29, Jonathan Rackowe wrote:
> Hi, if I missed this check in the messages then apologies, but 
> shouldn't you also check that all of the CPS connections are open 
> circuit (not shorted) to chassis/engine block ground; similar to the 
> checks you would do on a wheel speed sensor?
>
> Best regards,
> Jonathan
>
> 928 GT 1991 Amethyst Metallic
>
>
> On Tue, 11 Jan 2022 at 17:09, Paul R Smith via 928uk 
> <928uk at lists.928.org.uk> wrote:
>
>     Those readings, plus the condition of the plug look good, the
>     condition
>     of the plug looks like it has already been replaced.
>
>     You could see if you are getting any voltage from the pins that
>     recorded
>     a resistance while the engine is being turned over, but the signal
>     would
>     be less than 5v AC and your meter only goes as low as 200vAC so it
>     probably wouldn't register.
>
>     For the time being I think you can assume that the CPS is okay.
>
>     Have you checked/changed the ignition ecu relay yet?  (Relay VIII)
>
>     It might be a good idea to check that all of the battery
>     connections are
>     tight, including the smaller red wires as one of them feeds the
>     ignition, then check that the ignition ecu connector is getting
>     power on
>     pin 25 when the ignition is on.
>
>     Smiffy
>
>
>     On 11/01/2022 14:02, 21Gmail wrote:
>     > Hmm, I’ve repeated what I did before but the results are different,
>     > dunno what I did wrong this morning. As you say, I’m getting O/C
>     for
>     > two of the pairs and 0.93 - 0.95 (at 20k setting) for the other.
>     >>>>
>     >>>>
>     >>>>
>     >>>> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
>
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