We bought an Allspace at the beginning of this year. Recently I noticed that the start/stop wasn't coming on anymore unless we drove the car for quite some time. I checked battery voltage over a few days and noticed the battery generally only sat around 12.1 - 12.3V when parked and it dropped quite often below the 12V (e.g. 11.5-11.9V) when start stop kicked in, or when the car only did short trips for a few days. My Blackvue dashcam is also regularly cutting out within minutes of the car being parked (and it's linked to a 12V cutoff)
Alternator charge is working fine (>14V) and the car does normal city/highway driving which should be sufficient to keep charge. It does charge but it's just not holding well. I've recharged several times overnight and even tried a recondition cycle using my CTEK charger, but I'm not seeing the battery hold much more than mid 12's before settling back down to the 12V median.
OK, so I booked the car into service to get it checked out for potential battery replacement under warranty. Stupidly I charged the battery before taking it in - but I told them that, plus gave them the full history of all the diagnostics I've tried. Car came back saying - no fault found, no cause for battery replacement. They tried to blame me for having a Wayco fridge in the back (which wasn't even plugged in). I work with DC electrics, so this kind of BS just drives me up the wall.
Does anyone have a link or reference to a Workshop manual for the Tiguan? As far as I can tell, the start/stop fails to work when voltage drops to around 11.8V but I know it's also temperature related so it would be good to have the factory figures. There's generally a voltage range the factory has in their books under various conditions (e.g. ignition on, lights, fan off - reading should be 12.6 V ± .xV)
Alternator charge is working fine (>14V) and the car does normal city/highway driving which should be sufficient to keep charge. It does charge but it's just not holding well. I've recharged several times overnight and even tried a recondition cycle using my CTEK charger, but I'm not seeing the battery hold much more than mid 12's before settling back down to the 12V median.
OK, so I booked the car into service to get it checked out for potential battery replacement under warranty. Stupidly I charged the battery before taking it in - but I told them that, plus gave them the full history of all the diagnostics I've tried. Car came back saying - no fault found, no cause for battery replacement. They tried to blame me for having a Wayco fridge in the back (which wasn't even plugged in). I work with DC electrics, so this kind of BS just drives me up the wall.
Does anyone have a link or reference to a Workshop manual for the Tiguan? As far as I can tell, the start/stop fails to work when voltage drops to around 11.8V but I know it's also temperature related so it would be good to have the factory figures. There's generally a voltage range the factory has in their books under various conditions (e.g. ignition on, lights, fan off - reading should be 12.6 V ± .xV)
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