Isuzu Trooper Owners Club UK™

ravingmad · ** Joined: 17 May 2006 Posts: 64 Location: Ireland

hi guys,
mate has a 1999 trooper. 4jx1.. has been parked for a while. but had been running.
will turn over, but no start.. took it to main dealer and their tech 2 won't connect to it.
the glow plug light does not light when the ignition is switched on..(the bulb isn't blown,checked it)
also the check engine light doesn't come on (bulb also not blown, checked it)
have already changed rail sensor and crank angle sensor...no difference!

on the verge of a breakdown here!!

any ideas?

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Gribble · Posted: Fri Jul 17, 2009 12:04 Post subject:

So its an isuzu dealer with the isuzu 32 bit card in a tech II then ? Does it say no comms with vehicle on the tech II screen then or will the tech not power up ?
Try the tech II in the lighter socket , it will have an adapter for this and go to ign on and see what happens
If so then along with no check light I would be looking at the plug on the ECU with 5 wires in it and checking for 2 lives in on the reds when ign is at acc position . and making sure its live on the ecu pins too .

If the tech works off the lighter socket it will show whats up ,look in the chassis data screen to see if any dtc's are logged there .

You have checked all the fuses ?
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ravingmad · ** Joined: 17 May 2006 Posts: 64 Location: Ireland

yeah its an isuzu dealer with proper tech II. it says no comms with vehicle..
he reckons that the check engine light might be the cause... he didn't seem confident when he said
that though!!
cheers for the help..

oh i have checked all the fuses...

Gribble · Posted: Fri Jul 17, 2009 14:33 Post subject:

- Was the car booster started ever ? that can can cause ecu and non starting faults

The check light is powered from the ecu so if its not on an the bulbs ok then time to look closer at the ecu .
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aduncan · Posted: Fri Jul 17, 2009 16:58 Post subject:

I could be very wrong but lookey here at my posts - I had the same.....

Turns, won't start, No Glow Plug Lights, Check Engine Light not lit (IIRC) , No Tech2 COmms.

Twas a bent / damaged pin(s) in the connector to the ECU.

http://www.itocuk.co.uk/forums/viewtopic.php?t=15918

Hope it helps....
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ravingmad · ** Joined: 17 May 2006 Posts: 64 Location: Ireland

ravingmad · ** Joined: 17 May 2006 Posts: 64 Location: Ireland

Gribble · Posted: Fri Jul 17, 2009 18:03 Post subject:

Are the 2 pins on the 5 wire plug/ecu live too ? dont assume just cos the wires are the pins are !

Just a long shot here - is it the orriginal key ?
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ravingmad · ** Joined: 17 May 2006 Posts: 64 Location: Ireland

ravingmad · ** Joined: 17 May 2006 Posts: 64 Location: Ireland

Gribble · Posted: Sun Jul 19, 2009 13:57 Post subject:

Ah ! A

challenge !

Just to list it all - You have checked all the fuses in the engine bay including the 50 amp main supply and the ones in the drivers footwell as a blown brake light fuse will stop the engine .
You have power to tech II (guess thats with the garage not you ) but no comms is coming up but the OBD II port under the gearchange cover is live as the tech II powers up from it ?

The car spins over but wont fire up .

It could be - Just under and towards the engine in front of the ECU is a large multiplug that carries all the info to and from the ECU for the car . If this has come apart or got damaged it will give your problems , you will have to remove the ecu and air cleaner pipe to access it .The no comms msg would suggest that the wire has broken or got unplugged .

Can you measure the voltage on the other wire in the 5 pin plug with the ign at acc and check for continuity on the two black earth wires there too ?

In the OBD II socket that the garage put tech II into (if you are happy to try it ) connect pin 4 to pin 6 and turn the ign to on and see if the check engine light flashes , if so count the flashes as its codes .Yes I know thats the serial bus line into tech II but hey !

There is loads to try yet !
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ravingmad · ** Joined: 17 May 2006 Posts: 64 Location: Ireland

ok..have checked all fuses. all are ok.
yeah the obd port is live, tech II powering up no problem.
engine turns over, no start..

i will check that multiplug for damage today..

will also measure voltage on the other wire and check earths..

will also connect pins 4 + 6 and see what happens!

cheers Gribble

ravingmad · ** Joined: 17 May 2006 Posts: 64 Location: Ireland

Gribble, you are a legend!!

checked that multiplug under the ecu, it had come apart just enough to break the connection.

took it apart, checked all the pins and reconnected.. also cable tied it together..

hey presto, it started!! everything is working and no faults..

sorted!

thanks a mill,

Kevin

Gribble · Posted: Mon Jul 20, 2009 21:42 Post subject:

Ah good ! I do like a result .
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Red Robbo · Posted: Mon Jul 20, 2009 22:11 Post subject: