www.tdiclub.com

Economy - Longevity - Performance
The #1 Source of TDI Information on the Web!
Forums Articles Links Meets
Orders TDI Club Cards TDIFest 2016 Gone, but not forgotten VAG-Com List Unit Conversions TDIClub Chat Thank You




Go Back   TDIClub Forums > VW TDI Discussion Areas > OBD Scanners

OBD Scanners Discussions on using On Board Diagnostic (OBD) scanners/ Diagnostic Equipment related to TDIs

Reply
 
Thread Tools
Old January 18th, 2004, 21:29   #1
The Trouts
Veteran Member
 
Join Date: Apr 2001
Location: Pittsboro, NC
Default Engine Shutoff Solenoid Open/Short to Ground

The car died yesterday, but restarted fine today with the following code:

17946 P1538 Engine Shutoff Solenoid Open or short to ground
P1538-35-10 Intermittent


Anybody seen this before or have ideas on how to narrow this down?

I am hesistant to take this car into traffic until I figure this out.

Yesterday's post with symptoms

Intermittent sucks! [img]/images/graemlins/crazy.gif[/img]
Thanks
The Trouts is offline   Reply With Quote
Old January 19th, 2004, 05:40   #2
n1das
TDIClub Enthusiast
Veteran Member
 
n1das's Avatar
 
Join Date: Jun 2002
Location: Nashua, NH, USA
Fuel Economy: Who cares? It's a DIESEL! Great fuel economy comes as a bonus!
Default Engine Shutoff Solenoid Open/Short to Ground

Check the wire connection to the fuel cutoff solenoid on the injector pump. There is a single wire going to the solenoid. If I had a closeup pic of this area of the injector pump, I'd post it. Unfortunately, I don't have a pic.

The fuel cutoff solenoid is used to shut off fuel to the final stage of the injector pump to shut down the engine. When the engine is "on", there is +12V applied to the solenoid. When the engine is "off", there is 0V applied to the solenoid. The single wire supplies +12V to the solenoid. The electrical return path is the body of the pump and the engine ("ground").

The hardware securing the wire to the solenoid may be loose. It's real easy to check it and tighten if necessary.

The solenoid itself may be failing if the connection checks out OK. These solenoids are very reliable but some have failed. The solenoid is supposedly the same part that has been used on nearly all VW Diesels going back to the old VW Rabbit Diesels of the late 70's. It's actually a Bosch part.

There have also been a few failures where the O-ring gasket moves out of place and causes the solenoid to stick in the open or closed position (not an electrical problem). Since yours threw a code saying there's a intermittent electrical connection, check the wire connection to the solenoid.

Maybe someone else can chime in and post a pic of the pump and point to the fuel cutoff solenoid.

Just my $0.02 worth. Hope this information helps.


~ n1das

Black 2002 Golf GLS TDI 5-speed
86k miles and climbing!
n1das is online now   Reply With Quote
Old January 19th, 2004, 08:58   #3
The Trouts
Veteran Member
 
Join Date: Apr 2001
Location: Pittsboro, NC
Default Engine Shutoff Solenoid Open/Short to Ground

Thanks for the response,

I checked, briefly, the connection to the solenoid and saw no obvious looseness.

Is the solenoid fairly easy to replace?

Might a faulty/flaky relay or something "upstream" be sending a signal to shut down the solenoid, and yet result in this code?

I am thinking that I should remove the VA smart box upstream, and check the electrical connection where it plugs in. Any other thoughts on things my VagCom could check? How about an ignition switch?

Thanks again.

Bob
The Trouts is offline   Reply With Quote
Old January 19th, 2004, 15:22   #4
n1das
TDIClub Enthusiast
Veteran Member
 
n1das's Avatar
 
Join Date: Jun 2002
Location: Nashua, NH, USA
Fuel Economy: Who cares? It's a DIESEL! Great fuel economy comes as a bonus!
Default Engine Shutoff Solenoid Open/Short to Ground

Probably worth posting this in the A4 General Maintenance or A4 TDI General Discussion areas....to give your posting some better visibility and get help from the experts.

The solenoid is easy to replace. It unscrews from the injector pump housing. Unfortunately, I don't have the solenoid P/N or a pic to post.

Intermittent electrical problems can be a real PITA to troubleshoot. Fortunately a Diesel is a lot easier to troubleshoot than a modern gasser! LOL.

Check the solenoid electrical connection all the way back to the ECU. Probably one of the wiring harness connections has loosened up.

Just my $0.02 worth.


~ n1das

Black 2002 Golf GLS TDI 5-speed
86k miles and climbing!
n1das is online now   Reply With Quote
Old January 19th, 2004, 19:29   #5
The Trouts
Veteran Member
 
Join Date: Apr 2001
Location: Pittsboro, NC
Default Engine Shutoff Solenoid Open/Short to Ground

Thanks again n1das

I am armed with a jumper, and determination, and hope to get the car to my house tonight.

aloha
The Trouts is offline   Reply With Quote
Old January 20th, 2004, 22:14   #6
Herm TDI
 
Herm TDI's Avatar
 
Join Date: Nov 2001
Location: Richmond, Maine...The far side of Witsend
Default Engine Shutoff Solenoid Open/Short to Ground

At the EGR connector...Check the wires inside the plastic conduit. About 5 month ago..I had a Jetta that also had this same code...when I found were some damaged wires inside the conduit.

Hope this helps you,
Herm TDI is offline   Reply With Quote
Old January 21st, 2004, 08:09   #7
The Trouts
Veteran Member
 
Join Date: Apr 2001
Location: Pittsboro, NC
Default Engine Shutoff Solenoid Open/Short to Ground

Thanks Herm TDI,

I'm not real sure what you mean by EGR connector.

Do you mean the connector coming from the Electronic Control Module that head to the fuel injection pump?

Thanks,

Bob
The Trouts is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -7. The time now is 22:24.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Copyright - TDIClub Online LTD - 2017
Contact Us | Privacy Statement | Forum Rules | Disclaimer
TDIClub Online Ltd (TDIClub.com) is not affiliated with the VWoA or VWAG and is supported by contributions from viewers like you.
1996 - 2017, All Rights Reserved
Page generated in 0.12503 seconds with 12 queries
[Output: 75.79 Kb. compressed to 65.63 Kb. by saving 10.16 Kb. (13.41%)]