[928uk] FW: [Fwd: Re: Fwd: Re: PSD operation] & Tyre pressures]]

Fri Feb 10 00:02:13 UTC 2012

You are right, you wouldn't want to just ground pin 2 while it is still 
connected to the PDK control unit. You would need to cut the wire and 
use a 2-way switch to connect the wire to either pin 2 or ground.

But, that might not work. There are several connections from the RDK 
control unit to the dash, and you may need to isolate them all with a 
multi-pole switch. Without the details of the RDK circuitry, you could 
only do this by trial and error.

Smiffy

On 10/02/2012 04:32, Michael Parris wrote:
> http://jenniskens.livedsl.nl/Technical/Tips/Files/rdk%20bypass.pdf
>
> Although this does say to leave the connector off, and you are just
> making the connections on the plug itself so I am not sure if it would
> break something in the RDK unit if the plug was plugged back in with
> pins 2 and 13 shorted.
>
>
> Mike
>
>
> ------------------------------------------------------------------------
> From: pagnobito at hotmail.com
> To: mark.nichols at eltek-semi.com; sylvan309 at gmail.com
> Date: Thu, 9 Feb 2012 15:30:02 +0000
> CC: 928uk at lists.928.org.uk
> Subject: Re: [928uk] FW: [Fwd: Re: Fwd: Re: PSD operation] & Tyre
> pressures]]
>
> I believe the method to disable the RDK system is put a wire link from
> connector pin 2 to 13, so all you should need is a switch on that wire,
> open = system monitoring and closed = bypassed. No resistor needed.
> As Smiffy says, they are off or on and I presume that is on or off from
> the sensor itself so there is no way to alter the pressure sense unless
> you change the sensors in the wheel?
>
> Mike
>
>
>  > From: Mark.Nichols at eltek-semi.com
>  > To: sylvan309 at gmail.com
>  > Date: Thu, 9 Feb 2012 14:39:40 +0000
>  > CC: 928uk at lists.928.org.uk
>  > Subject: Re: [928uk] FW: [Fwd: Re: Fwd: Re: PSD operation] & Tyre
> pressures]]
>  >
>  > From what I understand that would probably work and would still be
> useful. I like the TPM. I have slow leaks in both fronts since new tyres
> fitted. Either not sealed properly around bead or the TPM sensors are
> leaking....Would be great to be able to dial in a trigger pressure though!
>  >
>  > Cheers
>  >
>  >
>  > Mark Nichols
>  >
>  > -----Original Message-----
>  > From: Allan Winter [mailto:sylvan309 at gmail.com]
>  > Sent: 09 February 2012 14:18
>  > To: Mark Nichols
>  > Subject: Re: [928uk] FW: [Fwd: Re: Fwd: Re: PSD operation] & Tyre
> pressures]]
>  >
>  > But could you not wire the resistor in a switched circuit, switch in
> position one, normal RDK operation, position 2, resistor on circuit
> effectively disabling RDK for thos cold days at reduced pressures?
>  >
>  > Allan
>  >
>  > On Thu, Feb 9, 2012 at 12:15 PM, Mark Nichols
> <Mark.Nichols at eltek-semi.com> wrote:
>  > > Sounded to useful to be that simple! Never mind.
>  > > Thanks,
>  > > Mark
>  > >
>  > >
>  > >
>  > >
>  > > ---------------------------- Original Message
>  > > ----------------------------
>  > > Subject: Re: [928uk] Fwd: Re: PSD operation] & Tyre pressures]
>  > > From: "Paul R. Smith" <smiffypr at clear.net.nz>
>  > > Date: Thu, February 9, 2012 11:37 am
>  > > To: 928uk at lists.928.org.uk
>  > > ----------------------------------------------------------------------
>  > > ----
>  > >
>  > > No, you wouldn't be able to do that, the sensors themselves are on
> or off.
>  > >
>  > > Smiffy
>  > >
>  > > On 09/02/2012 23:55, Mark Nichols wrote:
>  > >> That makes sense. Considering my everyday journeys are mostly 30 - 50
>  > >> mph& I always check and adjust for longer runs, I'll give it a try.
>  > >> I seem to remember the TPS warning can be overridden with a resistor?
>  > >> I wonder if one could make it variable threshold with a variable
>  > >> resistor... The intention being to retain TPS function but be able to
>  > >> set at a preferred trigger point.
>  > >>
>  > >> Cheers
>  > >>
>  > >>
>  > >>
>  > >> ---------------------------- Original Message
>  > >> ---------------------------- Subject: Re: [928uk] FW: [Fwd: Re: PSD
>  > >> operation]& Tyre pressures From: "Paul R.
>  > >> Smith"<smiffypr at clear.net.nz> Date: Thu, February 9, 2012 10:35 am
>  > >> To: 928uk at lists.928.org.uk
>  > >> ---------------------------------------------------------------------
>  > >> -
>  > >> ----
>  > >>
>  > >> I used to drop the tyre pressures in the winter by about 5psi, but
>  > >> didn't have RDK. The standard tyre pressures are set to prevent
>  > >> overheating at high speeds, but don't allow the tyres to warm up on
>  > >> cold, wet, straight roads.
>  > >>
>  > >> The RDK sensors are temperature dependant, the given pressures being
>  > >> for 20C, so you should be able to get away with a little less in the
>  > >> cold weather, but probably not enough to get extra grip without the
>  > >> warning going off.
>  > >>
>  > >
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