2015 5 cyl diesel jump start question

pont · Sep 17th, 2022, 02:37

Hi,
The manual says not to connect the negative jump lead to the battery direct when jump starting, but to use the chassis earth instead.
Can anyone tell me why that is so?
Many thanks

BorderVolvo · Sep 17th, 2022, 07:31

It'll likely have a sensor attached to the battery terminal which could be damaged by jump starting direct to the terminals.
A lot of manufacturers now purposefully make the negative terminal difficult to access.
From a safety point of view if you make the last connection to engine or chassis earth (there'll usually be a spark) then there's less chance of battery gasses exploding!

Easington · Sep 17th, 2022, 14:31

So that the Battery Condition Monitor is in the circuit I believe. Connecting the negative direct to the battery effectively bypasses it

Sep 17th, 2022, 02:37	#1
pont Member Last Online: May 3rd, 2024 18:57 Join Date: Dec 2007 Location: worcester	2015 5 cyl diesel jump start question Hi, The manual says not to connect the negative jump lead to the battery direct when jump starting, but to use the chassis earth instead. Can anyone tell me why that is so? Many thanks

Sep 17th, 2022, 07:31	#2
BorderVolvo Member Last Online: Today 06:28 Join Date: Oct 2018 Location: North of Jedburgh	It'll likely have a sensor attached to the battery terminal which could be damaged by jump starting direct to the terminals. A lot of manufacturers now purposefully make the negative terminal difficult to access. From a safety point of view if you make the last connection to engine or chassis earth (there'll usually be a spark) then there's less chance of battery gasses exploding! __________________ V70 2.4 Phase 1.....2435cc.....Registered 31/3/2000.....Leather,AC,CC,etc!.....182k

Sep 17th, 2022, 14:31	#3
Easington Master Member Last Online: Jul 28th, 2023 12:45 Join Date: Oct 2018 Location: Lincolnshire	So that the Battery Condition Monitor is in the circuit I believe. Connecting the negative direct to the battery effectively bypasses it __________________ V60 Cross Country D4 (2.4 5 cylinder) AWD Lux Nav Geartronic 2016 - Electric Silver, Polestar Optimisation and Police Spec Dipstick

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