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BCM/Seat Memory module fault
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HairyFool
 


Member Since: 04 Jan 2023
Location: Essex
Posts: 504

United Kingdom 2016 Discovery 4 3.0 SDV6 Landmark LE Auto ZanzibarDiscovery 4
BCM/Seat Memory module fault

My Drivers door mirror auto dips to its lowest position on selecting reverse and does not recover after exiting reverse or selecting Drive. Auto Dip is OFF in settings

Took out the memory module today and inspected for dry joints etc., not helped by the laquer over most of the board. Nothing untoward found so refitted with contact cleaner in the plugs.

Reading the status data with my AP200 line 133, 5 volt potentiometer supply reads 0.34v which probably explains the error of no mirror position feedback.

Anybody know where this 5v is derived from?
 A visitor from the dark side, my other vehicle is an MG5 EV  
Post #233814330th May 2023 9:29 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10336

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

5v will be derived from memory module.
Should be the same one that does the 4 positions
  
Post #233815031st May 2023 6:20 am
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M3DPO
 


Member Since: 22 Sep 2010
Location: Notts.
Posts: 8044

England 2014 Discovery 4 3.0 SDV6 HSE Lux Auto Corris GreyDiscovery 4

Memory module got senile dementure, common fault, the module has been upgraded several times.
 It can when others can't,
It will when others won't,
It goes where others don't. 
 
Post #233815331st May 2023 7:04 am
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