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Old 12-04-2015   #1
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Check your vehicle protection system

Hi,
Just plugged in Bluetooth ELM Obd device to my Croma, downloaded android app to read ECU data, tried to connect app with device and start the engine, cannot turn the key in ignition and info on dashboard said Check your vehicle protection system, now ignition is dead, cannot even use remote controller to lock/unlock doors.
Anyone came across anything like that before, is there simple solution?
Thanks

Update :
Just tried emergency key release hole right under the ignition, now I can turn key, but car is unresponsive.

After reading related threads In have decided to have a look at the battery, found out it's only 60Ah, that could be the reason for my alarm problems, I change battery for more powerful to handle the load of alarm system etc.
After unplugging Bluetooth obd reader from Croma, car starts as normal.

Now, could obd reader drain battery power this much to operate that I can't start the engine?
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Last edited by Paulski; 12-04-2015 at 21:39.
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Old 13-04-2015   #2
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Re: Check your vehicle protection system

What I also have had problem with was to remove Bluetooth ELM device from the socket, I had to remove the panels and some cables around, fiddle about with fuse board in order to get better access to grip and pull the ELM device out of the socket.
Is that always the case when you plug in OBD II reader? Quite a pain.
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Old 13-04-2015   #3
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Re: Check your vehicle protection system

Sounds to me like your Bluetooth EML device is either faulty or badly terminated and is pulling down the CAN-Bus signals. On the Croma the TEG Unit (key control unit) is connected to the body computer by the CAN-Bus.

If you hop over to the MultiECUScan forum and more specifically this link http://forum.multiecuscan.net/viewtopic.php?f=5&t=1493 you will be able to read about the faulty ELM devices and line termination. Many devices require two resistors to be removed to free up the CAN lines.

Regarding the OBDII socket on the Croma. Yes it is a tight fit and one has to gently rock, top to bottom to top, the ELM connected either gently pushing or pulling as appropriate. Many Bluetooth EML devices are much smaller than the standard ELM cable connection so I'm not really surprised that you find the difficulty in removal.
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Last edited by s130; 13-04-2015 at 12:48.
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Old 22-04-2015   #4
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Re: Check your vehicle protection system

instead of Bluetooth one I went for wired UL480 Memoryscan, it read 3 faults from computer (and the cause of amber check engine light on dashboard).
-P0092 fuel pressure regulator 1 circuit high
-P0091 fuel pressure regulator 1 circuit low
-P0401 EGR insufficient flow.

I see no blanking plates installed by previous owners so I suspect that I must take out EGR valve and give it a good clean (that's related to the last fault).
Top two faults related to fuel pressure regulator... Would that be fuel filter Needs bleeding water off or changing?
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Old 23-04-2015   #5
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Re: Check your vehicle protection system

I had the 91 & 92 faults.

Changed the pressure regulator (Easy if you have spiders fingers.) and everything works better.
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Old 23-04-2015   #6
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Re: Check your vehicle protection system

Thanks for advice SkinnyandWirey, I will definitely give it a go.
Read allover internet last night that this could be pressure regulator.
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Old 24-04-2015   #7
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Re: Check your vehicle protection system

I bought my part for about 65 off ebay.

To fit, you have to un-do all the clips above the reg, and remove the egr vale. There are 3 bolts for the reg. Can't remember the size or number though.

Once you've found a suitable position to remove the regulator (Mine was sitting on the air filter) it's quite simple. Just very very fiddly. Make sure you have a magnetic tool set!
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Old 27-04-2015   #8
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Re: Check your vehicle protection system

Very odd thing happened, first I have decided to clean egr valve and piping throughly and then give it a go with fuel pressure regulator, but strangely cleaning whole egr system seems to solve all 3 of above problems, because amber light is out and no more faults indicated, the only bad thing happened was power steering gone when I first started engine after reassembling egr system, but it only lasted 2 minutes and then came back to life during drive.
Odd...
I will keep pressure regulator as a backup, just in case...
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