Date: Sun, 10 Apr 2011 11:37:38 -0700
Reply-To: Jim Arnott <jrasite@EONI.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Jim Arnott <jrasite@EONI.COM>
Subject: Re: I guess if I'm putting on a tencentlife oil cooler
. . .
In-Reply-To: <1302456797.5999.306.camel@TheJackUbuntuNetbook>
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
Okay Rocky, I'll try to explain.
The 1.9 and the 2.1 oil pressure sensing systems are completely
different.
1.9: Has an idiot light. One pressure switch located on the bottom of
the engine between cylinders 3 & 4. No rpm sensor. If the pressure
drops below .3 bar the light goes on. Period.
2.1: Two pressure switches and a few electronics. Low pressure switch
just like the 1.9. Pressure drops below .3 bar, the idiot light comes
on. Hi pressure switch located to the lower left of the crank pulley.
Pressure drops below .9 bar with engine rpm over 2k, light comes on,
buzzer sounds.
You have a 1.9. The second scenario does not apply. All you have is
one pressure switch. To add a gauge, you need a hose to get from under
the engine to on top of the engine. A tee and the stock switch and the
correct sending unit for the gauge you're going to use.
Ignore all about the dynamic oil pressure sensing system. It does not
apply to your van. Pressure low, light comes on. Period. There ain't
no more.
Jim
On Apr 10, 2011, at 10:33 AM, Rocket J Squirrel wrote:
> Hi Mark, I guess I'm still not getting this. Please remember that I'm
> dealing with a 1.9L version here.
>
> The sender has one wire connected to it, blu/blk, according to the
> wiring diagram on 97.56.
>
> What do that sender do? My first guess:
>
> Pressure too low = switch closes, connecting the blu/blk wire to
> ground,
> Pressure okay = switch open, blu/blk wire not connected to ground,
> Pressure high = switch closes again, blu/blk wire connecting to ground
> again?
>
> Thanks for your patience,
>
> --
> Rocky J Squirrel
>
>
>
> On Sun, 2011-04-10 at 08:56 -0700, mark drillock wrote:
>
>> The buzzer is only used for the high rpm pressure switch. The low
>> pressure switch just triggers a blinking led. The high switch
>> triggers
>> both. I'm sure this is done so there is no alarm sounding when you
>> have
>> the key on but engine not running. The alarm is loud enough to be
>> heard
>> over all the other sounds while driving so it would be too loud
>> with the
>> engine not running.
>>
>> Mark
>>
>>
>> Rocket J Squirrel wrote:
>>> Well, I wasn't trying to get all fancy like that. This being an 84
>>> model, and if the wiring diagram on 97.56 isn't lying, then just
>>> wiring
>>> a buzzer in parallel with the idiot lamp should give an audible
>>> alarm
>>> whenever the oil pressure lamp lights.
>>>
>>> There's only a single wire running from the op switch to the dash
>>> light,
>>> according to the diagram, so it can't be any fancier than that.
>>>
>>> Unless the wiring diagram is inaccurate, of course.
>>>
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