|
|
T5 won't start when weather is warm ior hot |
Post Reply 
|
| Author | |
Leeroy8022 
Newbie 
Joined: 16 May 18 Location: Cheltenham Status: Offline Points: 7 |
 Post Options
 Thanks(0)
 Quote Reply
 Topic: T5 won't start when weather is warm ior hotPosted: 16 May 18 at 18:34 |
|
Hi all.. got a 2005 t5 1.9. The problem I'm having is you have to keep turning the ignition on and off over and over again until I can get the glow plug light to come on which then lets the fuel pump kick in and it will then start. When the weather is hot you can't get the glow plug light to come on at all hence then no fuel pump ect so won't start. So far I've had the ecu checked for faults ( sentbecu off for a full test) .. new relays throughout, new temp sensor on the back of the engin. Also the fans start up and run when ignition is on even if vans not been started for a few days. With this warm weather ATM the van will not start and I can't get to work.. help please
|
|
 |
|
|
gregozedobe
Vanorak 
Joined: 22 Dec 06 Location: Canberra, Oz Status: Offline Points: -998266 |
Post Options
Thanks(0)
Quote Reply
Posted: 17 May 18 at 04:26 |
|
Still sounds like a temp sensor problem to me. Maybe the external temp one behind the grille, or a duff connection somewhere ?
|
|
|
|
|
Leeroy8022
Newbie
Joined: 16 May 18 Location: Cheltenham Status: Offline Points: 7 |
Post Options
Thanks(0)
Quote Reply
Posted: 17 May 18 at 08:28 |
|
Couldn't find any external air sensor.. do they all have them or just certain models?
|
|
|
|
|
gregozedobe
Vanorak
Joined: 22 Dec 06 Location: Canberra, Oz Status: Offline Points: -998266 |
Post Options
Thanks(0)
Quote Reply
Posted: 17 May 18 at 11:05 |
|
I'm not sure. Does yours display the external temp on the dash (and a red snowflake symbol with a scary "bong" noise when temps drop below 5C to warn you of possible black ice) ?
IIRC mine is clipped inside the front bumper.
Edited by gregozedobe - 17 May 18 at 11:06 |
|
|
|
|
DaveHobie
Not Quite Newbie
Joined: 14 Jan 13 Location: South Africa Status: Offline Points: 22 |
Post Options
Thanks(0)
Quote Reply
Posted: 17 May 18 at 21:27 |
|
Check relay 109 in the fuse box under the battery. If you get the traction control light on the dash then that will be the fault.
Listen to hear if the pump primes itself - you can hear it easily. Fans will run as well - if I remember it kicks into high speed, on my relay it was stuck closed due to a corroded wire inside. If you pull out the relay, remove the cover, refit - check if the relay closes or not - so you are fitting the relay back naked just to test. Edited by DaveHobie - 17 May 18 at 21:35 |
|
|
|
|
T5 TDI
Vanorak
Joined: 05 Nov 05 Status: Offline Points: 3687 |
Post Options
Thanks(0)
Quote Reply
Posted: 17 May 18 at 22:01 |
|
There might be more than one temp sensor on your van. Have you had it on diagnostics? If so, post up the results.
 If you have access to VCDS watch/log the coolant temp live from cold. The cooling fans being permanently on just shows that the ECU has received signals it doesn't like. Perhaps something that it thinks (is programmed to think) could possibly cause overheating, so it just puts the cooling fans on as a precaution. The ambient air temp sensor (clipped behind the bumper on the drivers side as Greg says) is a classic example, if it is disconnected or fails, the ECU can't tell tell for certain if the van is in Siberia in the middle of winter or Alice Springs in summer and it will conclude that it cannot reliably keep the engine at the correct temperature so it switches the fans on. I don't think the coolant temp sensor could stop the low pressure fuel pump working but anything is possible. It could be something as simple as the ignition switch or maybe a wiring loom fault but unless you have access to a correct wiring diagram and understand what voltages and signals should be where and at what time I think you will struggle. You need to go to a specialist auto electrician or at least post a full scan of all of the controllers here. Good luck anyway!
 Edited by T5 TDI - 17 May 18 at 22:09 |
|
|
2004 2.5 174
|
|
|
|
|
Leeroy8022
Newbie
Joined: 16 May 18 Location: Cheltenham Status: Offline Points: 7 |
Post Options
Thanks(0)
Quote Reply
Posted: 21 May 18 at 12:02 |
|
Hi all this is where I'm at.
When the weather is hot or engin is hot I can't get the glow plug light to come on and the fuel pump surge to start the van. So far I've done these things... Sent ecu off for testing and repair but no faults found. Changed all the relays under the Battery compartment and under the dash. Installed new temp sensor on the engin and bottom of the rad. Installed a new crack sensor. Tested ignition switch and ok. Casusing ne a nightmare as van won't start a lot of the time.. sometimes you can turn ignition on and off hundreds of times before you get the glow plug light on. Also when you turn ignition on the fans run even when engin is cold. Had two garages plug the van in to diagnostics but can't get any fault codes and sometimes will not connect to ecu. Any more help ???? |
|
|
|
|
DaveHobie
Not Quite Newbie
Joined: 14 Jan 13 Location: South Africa Status: Offline Points: 22 |
Post Options
Thanks(0)
Quote Reply
Posted: 21 May 18 at 12:59 |
|
Bribe somebody that has a genuine vcds with beers to come check for you - you need a proper diagnostic with it. They always have at least one or two errors popping up now with age.
Under the battery in the fuse box compartment - Loosen every connector plug and check for corrosion - use electric cleaner only to clean terminals on both plugs - the male and female plugs. Make sure there are no wires broken off. Loosen and retighten all the fuses there. Take the cover off relay 109 and get someone to push it in at the same time you switch on the ignition and then try start it - see what happens. When you switch off make sure that relay also goes off else it will activate the fans. The ecu will not activate the pump and start if that relay is not in. If you are alone you can put a piece of paper in the relay to make the contacts touch and stay there - fans will also come on so make sure nothing will get caught there. Under the passenger seat disconnect all the plugs there and check for corrosion and spray them with electric cleaner. Sometimes just unplugging a connector plug allows it to make contact again. Try it, at this stage it is only your own time that you lose. You definately have communication errors which will show up with vcds. Disconnect the battery for safety as well after you have your radio codes and trip meter. |
|
|
|
|
Leeroy8022
Newbie
Joined: 16 May 18 Location: Cheltenham Status: Offline Points: 7 |
Post Options
Thanks(0)
Quote Reply
Posted: 21 May 18 at 14:18 |
|
Hi.. yes done all this already checked all connections. Still same problem. Also made sure the 109 relay is working and that is fine.
|
|
|
|
|
Leeroy8022
Newbie
Joined: 16 May 18 Location: Cheltenham Status: Offline Points: 7 |
Post Options
Thanks(0)
Quote Reply
Posted: 21 May 18 at 15:12 |
|
Also does anyone know if the cobra 4905 can bus alarm installed would cut the glow plugs and fuel? Wonder if that could be a problem?
|
|
|
|
|
DaveHobie
Not Quite Newbie
Joined: 14 Jan 13 Location: South Africa Status: Offline Points: 22 |
Post Options
Thanks(0)
Quote Reply
Posted: 21 May 18 at 15:51 |
|
More than likely, bypass it for now and test.
|
|
|
|
|
Leeroy8022
Newbie
Joined: 16 May 18 Location: Cheltenham Status: Offline Points: 7 |
Post Options
Thanks(0)
Quote Reply
Posted: 21 May 18 at 16:12 |
|
Anyone got a wiring diagram? Can't find anything online about the cobra 4905 alarm..
|
|
|
|
|
Post Reply
|
|
| Tweet |
| Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |
Topic Options