Date: Wed, 13 Oct 1999 21:57:57 -0700
Reply-To: David Marshall <vanagon@VOLKSWAGEN.ORG>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: David Marshall <vanagon@VOLKSWAGEN.ORG>
Subject: Re: Eurospec problem
In-Reply-To: <3804A296.1D6D5C8@rambus.com>
Content-Type: text/plain; charset="us-ascii"
There should be two replays for your Digifant II setup. Early systems had
one relay controlling the ECU and Injectors and a seperate one for the Fuel
Pump, 1990 and later models the Fuel Pump Relay controlled the Injectors.
I have a revised wiring pinout I'd like to share, this covers all three
revisions of the Digifant II system. Easiest way to tell what you have is
to look at the Idle Stabilizer wire colors. Good luck!
COLOR1 = 1987 - 1988 Jetta, 1989 Mexico Jetta / Golf
COLOR2 = 1989 German Jetta, 1990 - 1992 Golf / Jetta
COLOR3 = 1990 - 1993 Cabriolet / Fox
PIN COLOR1 COLOR2 COLOR 3 DESCRIPTION
----------------------------------------------------------------
1 R R/G R/BK Power when starter on (50)
2 G G V O2 Sens (Pin 1)
3 R/Y R/Y R/Y Fuel Pump Relay Trigger (Pin 85)
4 Y Y Y Knock Sensor (Pin 1)
5 BK BK W Knock Sensor (Pin 2)
6 BR/W BR/W BR/Y Throttle Switch (Pin 1)
6 BR/W BR/W BR/Y Coolant Sensor (Pin 2)
6 BR/W BR/W BR/Y Temp Sensor (Pin 4)
6 BR/W BR/W BR/Y Hall Generator - (Pin 1)
7 bare bare BK Knock Sensor Shield (Pin 3)
8 R/BK R/BK R/BK Hall Generator + (Pin 3)
9 BL/W BR/W BL/W Air Temp Sensor (Pin 1)
10 BR/G BR/G BR/G Coolant Temp Sensor (Pin 1)
11 R/BL R/BL R/BL Throttle Switch (Pin 2)
12 R BR/Y BR/W Fuel Injector Ground (Pin 2)
13 BR BR BR Ground (31)
14 BK/Y BK/Y BK/Y Digifant Power Relay (Pin 87)
14 BK/Y BK/Y* -- Fuel Injector Power (Pin 1)
15 -- -- -- No Connection --
16 -- G G Test Connection (Test)
17 BL/BK BL/BK BK/BL Air Flow Sensor (Pin 3)
18 G/W G/W G/W Hall Generator 0 (Pin 2)
19 BR/BK BR/BK BR/BK Ground (31)
20 W/R W/R -- Engine Warn Light (CA) (Test)
21 BL/R BL/R BL/R Air Flow Sensor (Pin 2)
22 W Y W Idle Stabilizer (Pin 1)
23 Y W BK/W Idle Stabilizer (Pin 3)
24 -- -- --- No Connection --
25 G G G/BK Hall Control Unit (Pin 6)
* 1989 Jetta Only
At 08:17 AM 13/10/1999 -0700, Grant Holst wrote:
>John wrote:
>>
>> Grant Holst wrote:
>> >
>> > I need the wisdom of the List. I have a Eurospec kit
>> > in my '85 GL. On hot days the engine will not start
>> > back up after sitting for a few minutes. It needs to
>> > cool down almost completely before it will start.
>> >
>> Hi grant,
>>
>> Because you have a engine "swap", there is no clear cut troubleshooting
>> routines. However I'm surprised to read your long story that contained
>> NO voltage measurements. The fact that the engine is "dead" is a real
>> blessing in disguise since it allows you to look at voltage values to
>> determine what's missing.
>>
>> You need to do a pin by pin of all the circuits to the control module.
>> There are maybe 20 circuits to be checked. This is the only way to deal
>> with such a problem. I have a Digifant pin-by-pin check list but it
>> won't work here due to the swap. Use the Bentley book and check each
>> circuit when the no start is present.
>>
>> Also do you know if the fuel pump is working during the no start and if
>> the new engine has a Hall sensor-is it working ?
>>
>> Regards, JP
>
>
>
>John,
>No I didn't take any voltage measurements, mainly because
>when the problem comes up I swap relays and that usually
>fixes the problem and I don't have my voltmeter with me
>at the time.
>You did stir some thought this morning with the fuel pump
>question. Do you know if the engine would act like it's
>running on 1 or 2 cyls for a while if the fuel pump
>wasn't pumping? The wire I replaced last night also
>powers the fuel pump relay as well as the power supply
>relay.
>
>Grant Holst
>Sunnyvale, Ca.
>
>
-- David Marshall - - Quesnel, BC, Canada --
-- 78 VW Rabbit, 80 VW Caddy, 84 VW Westie, 85 VW Cabriolet --
-- 87 Audi 5000 Quattro, 88 2.0L VW Syncro Double Cab --
-- David's Volkswagen Home Page http://www.volkswagen.org --
-- Fast Forward Autobahn Sport Tuning http://www.fastforward.ca --
-- david@volkswagen.org (pmail) or vanagon@volkswagen.org (list) --
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