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ian jenkins
Mississauga Ont canada
(67 posts)

Registered:
12/27/2010 11:06AM

Main British Car:
77 tr7

range rover on board diagnostic display 17EM
Posted by: en
Date: July 11, 2011 08:25PM

I have a couple of question with its use.
I have installed a 1992 3.5 with factory EFI in a triumph. Car hasn't run yet
I plugged the display into the harness and see no read out
Does engine need to run for display of fault codes?
Does it display anything if no fault codes?
Thank you


DiDueColpi
Fred Key
West coast - Canada
(1367 posts)

Registered:
05/14/2010 03:06AM

Main British Car:
I really thought that I'd be an action figure by now!

authors avatar
Re: range rover on board diagnostic display 17EM
Posted by: DiDueColpi
Date: July 14, 2011 09:06PM

Hey Ian,
No readout on the display is normal.
It will only activate if a code is present.
The ECU won't record a code unless the engine runs. Not supposed to be that way but thats how it is ITRW.
Codes are displayed with Key on Engine off.
If more than one code is present you will need to manipulate the serial connector to retrieve them.
Turn the key on, disconnect the white serial connector for more than 5 seconds then reconnect, turn off the key and wait for the system relay to cycle off, turn the key on and the next code will display or go blank if no further codes exist. You will need to repeat this process for each code. Sounds goofy but actually works pretty well.
Disconnecting the battery wipes the memory completely without displaying codes and the display goes blank again. ( may display code "02" which means the ECU lost battery power.)

Hope that makes sense.

Cheers
Fred


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