Mitsubishi Delica Owners Club UK™

SpmP · Joined: 24 Oct 2006 Posts: 43 Location: New Zealand

Gidday All,
(1988 L300 monster)
Startings been worse and worse and worse.... to the point when it wouldnt start at all yesterday.
My suspision confirmaed that there was no power getting to the bus bar, nor the cable leading to the bus bar.
Deli started first turn when I just jumpered the positive battery terminal to the bus bar 8~)

Ever since we ahve owned her the relay clicking has been quite different from what has been described elswhere on this board. Instead of Click once, wait 6-8 sec click again, and then one after a short time it has been:
1st key turn, click once .... 6 -8 sec .. click again, ..... click after some intermittant time, then click at about one second intervals once the engine has started for about a minute.

Anyway my questiones to your knowledgable people (or just unluck to have had this happen to you before me 8~)
1) As this is a right hand drive vehicle (opposite anyway to your UK monsters), the glow plug cable dissapears under the drives seat side, and the relay dosnt seem to be behind the battery. (I havnt buzzed it out fully yet so I could be way off) I dont think that this engine has seen any modding of any kind.... so where is the relay, the clicking sounds like it comes from behind my seat near the airfilter.
2) What drives this relay? is this the ECU? where oh where is the ECU and how do I get to it, what tests can be performed on it etc....
3) Are therer any photos floating around of these parts on the L300 to aid my visual memory
4) If it is the ecu (unlikely as relay is clicking and no power is getting to the glowplugs) Has anyone any experience in repairing these. Esp. prolonging the glowplug on delay.

cheers

Mystery Machine · Posted: Sat Jul 05, 2008 10:45 Post subject:

Here is some info that I wrote for the Canadian forum - may be of some help?? There's quite a bit of data, but read through, have a look and a poke around on your motor and the answer is probably in there somewhere! Wink

This info is based on the 2.5td (4D56 engine):

There are actually 3 different types of glow plug control system on L300's! Confused

Maybe best if we establish which one you have before I go firing too much data at you..... Wink

There are two common types: Auto Glow System and Super Quick Glow System (We'll ignore the Self-Regulating Glow System for now!)

Slide the drivers seat forward and remove the service hatch, not look in the area above the air filter pipe and see if you can identify your system from this image:

Let me know which you have and I'll see what info I can dig up for you....(I've got some wiring diagrams etc.... Wink

)

Regards,

Bruce.
_________________
'93 L300 Mystery Machine (High Altitude Edition Cool

)
'94 L300 Mud Monkey (Post Apolcalyptic Edition Twisted Evil

)

Mystery Machine · Posted: Sat Jul 05, 2008 10:48 Post subject:

Glow plug info part II:

Right,

After MUCH work trying to turn it into something you can actually make sense of from a really bad paper copy, I have finally cracked it!!

It's a bit too small to make out in this size, so HERE is a better sized image of the complete wiring diagram for the Super Quick Glow System.

I have not put it up as a direct image link because might be a bit large for some monitors!

If you want a much bigger 2,500 x 2000 pixel version (just in case you want to print out in hi-res??) then CLICK HERE

Hope that is a start??

I'll get to work on the other parts of the system when I get time! Maybe not today I'm afraid (The next bits will be all the diagnostic checklists for every wire/pin in the main glow-plug circuit.... Shocked

) I've digitized, edited and labelled all the drawings, it's just the 'fun' part of typing in all the data now!

Watch this space......

Regards for now,

Bruce.

P.S. PLEASE NOTE - the 'IGI' shown in the diagram by the ignition switch should actually be 'IG1'!! This is more obvious when comparing the diagram to the diagnostic checklist that I will post up later....

It was a VERY poor copy of the wiring diagram and it was only when producing the dignostic list did I notice that it is a '1', not an 'I'! Sorry about that! Confused

_________________
'93 L300 Mystery Machine (High Altitude Edition Cool

)
'94 L300 Mud Monkey (Post Apolcalyptic Edition Twisted Evil

)

Mystery Machine · Posted: Sat Jul 05, 2008 10:51 Post subject:

Glow plug info part III:

.....and here is the diagnostic info for the Glow Control Unit:

The unit can be found inside the 'B' Pillar to the right of the drivers shoulder (just above the access hatch for the air filter etc...)

The diagram below shows the pin configuration of the harness plug for the control unit.

I have written up all the diagnostic information associated with this unit (took me a few minutes I can tell you! Laughing

) but it doesn't translate too well without keeping it in a table, so have uploaded it as a Word document with all the table intact as well as screen-grabbing the document to make the image below:

You can download the Word document HERE - I hope it makes sense??

I really have run out of time for today, so I'll have to cover the 'water temp sensor', the 'starter relay', the 'dropping resistor' and 'glow plug relays' tomorrow if I get chance....sorry about that! Sad

(it's taking me a LOT longer to do than I had thought! Confused

)

Hope it is of some help for now??

Regards,

Bruce.
_________________
'93 L300 Mystery Machine (High Altitude Edition Cool

)
'94 L300 Mud Monkey (Post Apolcalyptic Edition Twisted Evil

)

Mystery Machine · Posted: Sat Jul 05, 2008 10:54 Post subject:

Glow plug info part IV:

Right - this last lot should help you locate a potential problem! Tie this little lot in with the chart above and double check against the wiring diagram and you may well get a result! Wink

You shouldn't attempt wiring diagnostics unless you know what you are up to (it sounds like you do though!) I'd hate to think of you burning out the glow control unit or melting any wiring in the loom! (maybe this is more a warning to others?? Please don't take it the wrong way! )

Here we go:

Diagnostics for the GLOW PLUG RELAYS:

Diagnostics for the WATER TEMP SENSOR:

Diagnostics for the STARTER RELAY:

Diagnostics for the DROPPING RESISTOR:

I have uploaded all the diagnostic info listed above onto my webspace for you to download. This is a single Word document with all the four diagnostic tests listed above (I just split them from the document for here so that I could place them next to each diagram.... Wink

) Please don't be too harsh about my spelling!

HERE is the document to make the complete check of the glow system along with the larger one for the Glow Control Unit HERE which is also linked in one of the posts above (just in case you missed it!) It took me a while to produce, so just kept the layout as simple as possible...

Best of luck diagnosing the problem - I hope you get it sorted??

Regards for now,

Bruce.
_________________
'93 L300 Mystery Machine (High Altitude Edition Cool

)
'94 L300 Mud Monkey (Post Apolcalyptic Edition Twisted Evil

)

Mystery Machine · Posted: Sat Jul 05, 2008 10:59 Post subject:

I think that's covered all the data?

I've just noticed that the links to the word documents aren't working (my website is down atm) so if you PM me your email address I can email them straight over to you.... Wink

Regards,

Bruce.
_________________
'93 L300 Mystery Machine (High Altitude Edition Cool

)
'94 L300 Mud Monkey (Post Apolcalyptic Edition Twisted Evil

)

steve b · Joined: 09 Jul 2007 Posts: 492 Location: WIRRAL

bl00dy hell !!!!!!!!!!!!! you've been busy Shocked

Lewis · Posted: Sat Jul 05, 2008 11:55 Post subject:

Bruce!

You have too much time on your hands. Wink

_________________
ルイス

Do not blindly go where the path may lead you. Go where there is no path and leave a trail that others may follow!

SpmP · Joined: 24 Oct 2006 Posts: 43 Location: New Zealand

Cheers Bruce
!WoW!
After a quick look it looks like the 'Super quick glow system'
What would the third look like?
How can I elegantly get behind the plastic cover on the 'B' pillar.
I am tempted to just rip it off, but theres always that thing with the panel that never quite goes back on right (like the ones in the boot I had to take off beacause a battery fell over filling the mighty beast with ACID)

Seriousley, this is FNATASTIC. Just the depth of info here. I have often wished there was a Trouble shooting section with this sort of info presented, especially repair jobs done and documented.
The side bar of Citroen DS ID is how I think the data should be presented....

anyway...

I am worried that I may have damaged the glow plugs as my method for starting the van when it wouldnt was to bridge the bus bar straight to the battery for 7-10s ....

Now to remove the intake pipe and be sure.

I will try to photograph as much as possibe... damn! batteries flat on the camera and lost the charger!

SpmP · Joined: 24 Oct 2006 Posts: 43 Location: New Zealand

Now fairly certain its not either of those two configurations.
Dammit its hard work getting the clip off the voltage dropper! (wihtout removing the air filter)

The relays seem bigger, and proportioned differently than in the images provided. Square rather than round. Still has the dropping resistor... (and its nasty little green connector under the intake pipe.) mirrors and torches to the rescue.

SpmP · Joined: 24 Oct 2006 Posts: 43 Location: New Zealand

My bad, its def. the Super qucik one.
Couldnt disconnect the dropper relay, and I started testing the voltages on the relay, and it appears to be working now. ... Damn intermittant faults! (the worst kind)
Turns out the glow plug on #4 is 1.05Mohm so get a new one of those and see how we go...

cheers

SpmP · Joined: 24 Oct 2006 Posts: 43 Location: New Zealand

Hopefully this will bump up to the top where it can bee seen....
I replaced the faulty glowplug, but starting has got chronic again. need to turn it over for about 2 minutes.... chug chug chug...
I have noticed that the glow bus to block voltage is 9v. Can anyone else with a working system and good battery check for me and let me know whta they experience.

Thanks

ztorm · Joined: 11 Aug 2008 Posts: 1 Location: Den Helder (Holland)

Hi there,
a newbie here, Still have to introduce myself, but have been looking at this forum for some time and maybe you can shed some light on this: I've been checking ,with help from a friend who is more keen on auto electrics, the whole quick start system. Mine starts now in an instant after replacing the plugs with original Mitsi's en changing the ECU.
After she fires up the " after glow" system has to take over, but this relay only gives current for maybe 3 seconds and than cuts out. All things were checked and match, only there's a differende in ohm reading between the two relays.
Could it be that there is a faulty type of relay fitted?
Or is a relay just a relay?
grtz,
ztorm

Tazza 327 · Posted: Sun Dec 14, 2008 19:46 Post subject: Glow Plug Light

Hi Bruce

I was looking for any available info on the glow plug light system on my 96 L400 with the 4m40 engine, when I came across your info in response to an enquiry for the L300 system!
The warning light only comes on for a "milisecond" but the glow plugs appear to be getting hot as normal but I am at a loss as to to what is the problem ? Confused

I have already replaced the main glow plug solenoid but the light does still not work correctly ? any help you can give with a wiring diagram or a link etc, would be appreciated !!

Thank you in anticipation

Regards
Tazza 327

Lewis · Posted: Mon Dec 15, 2008 0:57 Post subject: Re: Glow Plug Light