Member Since: 13 Oct 2014
Location: Nottingham
Posts: 1742
U1A39-87 error - adaptive headlamp failure
Just fitted some LED sidelights, but when I put the units back in, the yellow warning light for the adaptive headlamps is flashing. Connected IID tool and got the following:
U1A39-87 (AF) Communication malfunction of right actuator - Bus signal/message failure - missing a message
Took the headlamp out again - both of them since I wasn't sure if "right" meant offside on a UK vehicle - but the error is still there.
I didn't drop or knock the headlamps when I took them out.
Any suggestions as to what to look for?
MadrillenoThere are two rules for success,
1. Never tell everything you know.
Sounds like it's lost connection with the motor that moves the lamp, check the plug under the bottom cover into the ballast unit, it's a yellow plug Altox GSM FBH controller thread
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1st Jan 2015 3:56 pm
Madrilleno
Member Since: 13 Oct 2014
Location: Nottingham
Posts: 1742
Nearside or offside unit?There are two rules for success,
1. Never tell everything you know.
IID Pro MV License - D3, D4 & RRS - Enabling, Updates, D4 & RRS Timed / Remote Climate, D4 Bluetooth fitting
PM me for details
Owner of the original "Beanie" grille
D4 & RRS style D3 grilles made to order
1st Jan 2015 4:02 pm
Madrilleno
Member Since: 13 Oct 2014
Location: Nottingham
Posts: 1742
Sorry, I meant does "malfunction of right adaptor" in the error message mean that it's the offside headlamp which has failed?There are two rules for success,
1. Never tell everything you know.
Member Since: 14 Dec 2013
Location: Herefordshire
Posts: 2080
To the Company the Right hand Side is always the same side of the vehicle , ie sitting in drivers seat facing forward. It doesn't swap over depending on the vehicle configuration
1st Jan 2015 5:58 pm
Madrilleno
Member Since: 13 Oct 2014
Location: Nottingham
Posts: 1742
ThanksThere are two rules for success,
1. Never tell everything you know.
Member Since: 13 Oct 2014
Location: Nottingham
Posts: 1742
Took a look under the cover as suggested. Yellow plug properly inserted, so it's not that. Reassembled, but I still have the error.
Also lost PDC now, but I suspect I disturbed the wiring to the front sensors. Have replugged the connectors, but not tested yet. Tested and working now.
Is there any way to check the headlamp unit itself? Would unplugging the headlamp whilst the engine was running (lights not on) caused the fault?There are two rules for success,
1. Never tell everything you know.
Member Since: 13 Oct 2014
Location: Nottingham
Posts: 1742
In the absence of further info, is it possible to get the control unit as a separate part, or do I have to replace the whole headlamp unit?There are two rules for success,
1. Never tell everything you know.
Member Since: 01 Feb 2011
Location: Norfolk
Posts: 3171
I had problems when I put LED sides in mine.
Luckily it blew the fuses rather than any other damage to the adaptive light unit.
12th Feb 2015 3:16 pm
Madrilleno
Member Since: 13 Oct 2014
Location: Nottingham
Posts: 1742
That's interesting. I think I'll leave well alone with the old fashioned bulbs for a bit.There are two rules for success,
1. Never tell everything you know.
Not had any problems (yet) with my LED sidelights which have been in for well over a year.
Edit: Nor my LED cornering lamps either. Current: Discovery 3 06MY (55 reg) HSE Auto Zambezi Silver Allisport Fast Road Intercooler, V8 Brakes, Silicone IC Hoses, EGRs Blanked, Remapped, De-Cat pipe, FBHIC
Freelander 2 2007 HSE Manual Tambora Flame
Previous: FL2 56 reg SE Manual Black (written off )
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Last edited by Lost for Words on 12th Feb 2015 4:44 pm. Edited 1 time in total
12th Feb 2015 4:41 pm
maplecottage
Member Since: 01 Feb 2011
Location: Norfolk
Posts: 3171
Madrilleno wrote:
That's interesting. I think I'll leave well alone with the old fashioned bulbs for a bit.
I should add - got some replacements and they worked fine (and still do)
12th Feb 2015 4:43 pm
jungleman1
Member Since: 10 Dec 2015
Location: 500060
Posts: 3
I have the same problem. I tried to change my light to LED and as soon as I changed the lights the I had this same error, and my swivel has stopped working and it gave the error on the two headlights. what can I do to correct these, however does someone have the disassembly procedure for the headlights? I seem to notice that one of the headlights is more recessed than the other, possibly explaining the play I hear when the headlights are shaken
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Allisport Fast Road Intercooler, V8 Brakes, Silicone IC Hoses, EGRs Blanked, Remapped, De-Cat pipe, FBHIC
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