 | Home > In Car Electronics > Engine management light not coming on |
 
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| diesel_jim Member Since: 13 Oct 2008 Location: hiding Posts: 6036   
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Maybe there is another (Expensive) fault on the vehicle, and someone "disconnected" it so as not to raise the suspicion of the MoT inspector?
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26th Sep 2019 8:50pm |
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| foggydave Member Since: 29 Nov 2012 Location: Midlands Posts: 263 
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He bought the motor a few months ago and knew from experience that the EGR valve was playing up which he replaced. He ran a diagnostic and only found a MAF fault which was corrected and cleared. He had not noticed the light was off until it was pointed it out to him during the check. It may have been turned off because of the EGR valve. So! the question remains what should he be looking for to turn it back on? Is there a fuse in the circuit somewhere?
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26th Sep 2019 9:07pm |
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| MadTom Member Since: 10 Sep 2013 Location: Olomouc Posts: 572  
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Look for a piece of black tape inside the instrument cluster covering the light. These lights are LED based, so no simple way to remove the "bulb". Covering or de-soldering are two simplest ways for this type of "repair". "Drobek" = The Small One - Discovery 2, "Blufínek" = The Blue Thing - Defender 130, and for me at least Ford Mondeo
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27th Sep 2019 5:51am |
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| foggydave Member Since: 29 Nov 2012 Location: Midlands Posts: 263
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Hi
He has taken the binnacle out but was nervous about dismantling the unit. Having trawled Utube it does look as though with a little care the binnacle can be taken apart. It seems to be the case that a motor will fail an MOT if the engine management light is on and I would think as the EGR was faulty it would have activated the light and so would have been tampered with. |
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27th Sep 2019 6:35am |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 16870 
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I believe it should also fail the MOT if the MIL doesn't illuminate during the lights-on test phase of the ignition-on start-up cycle, since this indicates the MIL is defective or disabled.
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27th Sep 2019 6:59am |
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| hank Member Since: 12 Sep 2016 Location: South Wales Posts: 2227 
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Check all wiring to the instrument panel/connector is in tact.
Check voltage to EML pin https://www.lrworkshop.com/connectors/defender-2007/C1040R > 110 XS Double Cab > Instagram @simonlanemind Last edited by hank on 27th Sep 2019 3:37pm. Edited 1 time in total |
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27th Sep 2019 3:01pm |
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| dorsetsmith Member Since: 30 Oct 2011 Location: South West Posts: 4554 |
MIL Amber lamp bulb check yes *
* bulb check performed by sub system i.e. ECM not instrument cluster |
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27th Sep 2019 3:32pm |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6480 
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No hardwired pin for the EML, it's sent over CAN. Suggests the ECU isn't sending it for some reason
  1988 90 Td5 NAS soft top
2015 D90 XS SW |
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27th Sep 2019 3:40pm |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6480
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Scrap the above if you believe it's been tampered with. Presumably the LED has been removed from the board or a trace on the PCB to it has been cut
If you want it inspecting/repairing I'm happy to quote to do so  1988 90 Td5 NAS soft top
2015 D90 XS SW |
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27th Sep 2019 3:41pm |
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