Voodoo101 Posted July 5 Share Posted July 5 So I installed a new head unit which turned out to have an internal fault. Smoke was coming from the dashboard so I stripped it out. Turns out it did more damage as it took out the alternator, the display for the gear change and the reversing beep. I had the alternator replaced but I still have missing gear display and missing beep, plus the battery light is on dim. I have run a scan and it says "B2281 Convienience system fault" Anyone have any idea where to start looking Quote Link to comment Share on other sites More sharing options...
Chris.ac Posted July 5 Share Posted July 5 B2281 is smart entry and start system (start function) Probably looked to some damage to the can system - ECU due not recognise shift is in P. 2.4 or 3.5l? Quote Link to comment Share on other sites More sharing options...
Chris.ac Posted July 5 Share Posted July 5 You have techstream? Quote Link to comment Share on other sites More sharing options...
Chris.ac Posted July 5 Share Posted July 5 Quote Link to comment Share on other sites More sharing options...
Chris.ac Posted July 5 Share Posted July 5 If you are not getting those resistances, it says to replace the shift lock control unit assy. I would guess you melted a wire somewhere. Quote Link to comment Share on other sites More sharing options...
Chris.ac Posted July 5 Share Posted July 5 Does engine start up? Quote Link to comment Share on other sites More sharing options...
Voodoo101 Posted July 6 Author Share Posted July 6 (edited) The engine starts and it drives fine, car changes gear no problem. These are the faults No display of gear selection on dashboard No beep when in reverse No signal for reverse camera Doors dont unlock when in park Battery light on dash is lit but dull Update. Just tried putting car in manual gears and these show but then vanish. Taking it out and putting it back in does the same Edited July 6 by Voodoo101 Quote Link to comment Share on other sites More sharing options...
Rojie Posted July 6 Share Posted July 6 8 hours ago, Voodoo101 said: The engine starts and it drives fine, car changes gear no problem. These are the faults No display of gear selection on dashboard No beep when in reverse No signal for reverse camera Doors dont unlock when in park Battery light on dash is lit but dull Update. Just tried putting car in manual gears and these show but then vanish. Taking it out and putting it back in does the same Do you have the OEM head unit fitted, or an aftermarket replacement ? Quote Link to comment Share on other sites More sharing options...
Voodoo101 Posted July 6 Author Share Posted July 6 6 minutes ago, Rojie said: Do you have the OEM head unit fitted, or an aftermarket replacement ? Non at the moment, its just an empty hole with all the wires Quote Link to comment Share on other sites More sharing options...
Chris.ac Posted July 6 Share Posted July 6 9 hours ago, Voodoo101 said: The engine starts and it drives fine, car changes gear no problem. These are the faults No display of gear selection on dashboard No beep when in reverse No signal for reverse camera Doors dont unlock when in park Battery light on dash is lit but dull Update. Just tried putting car in manual gears and these show but then vanish. Taking it out and putting it back in does the same Really sounds like a connector or loose somewhere, probably when you recover the headunit. The ecu has inputs for Reverse, gear selection, etc, so doors not detecting a park signal etc. Quote Link to comment Share on other sites More sharing options...
Rojie Posted July 6 Share Posted July 6 11 minutes ago, Voodoo101 said: Non at the moment, its just an empty hole with all the wires I see. Quite a spaghetti special then ! Quote Link to comment Share on other sites More sharing options...
Voodoo101 Posted July 6 Author Share Posted July 6 17 minutes ago, Rojie said: I see. Quite a spaghetti special then ! The original owner changed the head unit to a Sony one. They cut the roof monitor cable plug off for some reason, i guess they thought it was the reversing camera. There are wires tacked on everywhere and the AC unit has a wire that connects to the cig lighter. When I removed the unit and plugged the ISO cable into a new unit, the unit started smoking, so I pulled it out. Then I realised that the reversing beep was missing and the lights on the dash was not on. When I stopped and tried starting again I found the alternator was dead, so £130 for a new alternator, £40 for a new belt, £80 to fit and still have this problem to find. I dont really mind paying for a new alternator, it was the original one on from 2009 and 120k miles, so probs old anyway Quote Link to comment Share on other sites More sharing options...
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