Body control module

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LesW
Posts: 316
Joined: Tue Dec 15, 2015 3:09 pm
Location: Bedfordshire

Body control module

Post by LesW » Wed Nov 06, 2019 7:35 pm

Can anyone tell me where the BCM is located
XE R-Sport (11 March) Polaris White, Meridian, Space saver,19 Venom, Keyless, 14 way memory, Folding seat, Black, Panoramic, Parking and Cold Pack
XE R-Sport 180 (replaced nearly everything) XF Face lift XF pre face lift X type face lift X type estate


Phil
Posts: 408
Joined: Tue Feb 02, 2016 11:19 pm
Location: Monmouthshire

Re: Body control module

Post by Phil » Thu Nov 07, 2019 12:01 am

It's by the fuse box in the passenger footwell. You will probably need to remove the panel to get the module out (remove the trim on the side of the glove box first to access the screws)

If you're replacing I think you need to program the new one to the car


LesW
Posts: 316
Joined: Tue Dec 15, 2015 3:09 pm
Location: Bedfordshire

Re: Body control module

Post by LesW » Thu Nov 07, 2019 5:49 pm

Thanks for the info. Its with the dealership for them to sort as the car is still under warranty.
XE R-Sport (11 March) Polaris White, Meridian, Space saver,19 Venom, Keyless, 14 way memory, Folding seat, Black, Panoramic, Parking and Cold Pack
XE R-Sport 180 (replaced nearly everything) XF Face lift XF pre face lift X type face lift X type estate


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Bazzamf
Posts: 467
Joined: Thu Aug 31, 2017 4:33 pm
Location: Bucks

Re: Body control module

Post by Bazzamf » Fri Nov 08, 2019 1:08 pm

What the hell is a body control module and what does it do? If it goes wrong how would I know?
Bazzamf - XE 200 Ingenium Portfolio in Santorini Black


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Vespa
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Location: North West UK

Re: Body control module

Post by Vespa » Fri Nov 08, 2019 1:17 pm

The BCM is the Body Control Module associated with the battery etc.
A Battery Monitoring System (BMS) control module is mounted on the battery negative terminal and
provides battery status information for the Body Control Module/Gateway Module (BCM/GWM)
assembly.
CAUTION:
When connecting a slave power supply to the vehicle, to avoid damaging the BMS control
module, always use the ground (negative (-)) terminal stud point on the right side top mount in
the engine compartment. Never connect directly to the battery negative terminal when
connecting a slave power supply to the vehicle; the BMS control module can be damaged.
The BJB is located below the luggage compartment floor panel, adjacent to the battery. The RJB is
located on the right side of the luggage compartment behind the trim panel. The BJB and RJB contain
fusible links, fuses, and relays to distribute electrical power to various vehicle systems. The right and
left EJBs are mounted adjacent to the appropriate front suspension top mount in the engine
compartment.
A jump start terminal is located below a hinged cover, adjacent to the right EJB. An additional cover
with a lanyard protects the terminal when not in use. If jump starting is required, the cover must be
removed and the positive (+) jump lead attached securely. The negative (-) jump lead is attached to
a jump start terminal stud located on the right side top mount. The cover must be fitted to the
positive terminal when not in use.
The Voltage Quality Module (VQM) is used to prevent the vehicle electrical systems being subjected to
undesirably low voltages during repeated engine restarts and produces a constant output voltage
during engine restart operation. If the electrical systems are subject to low voltages the customer
may notice degraded performance of components and systems and incorrect fault Diagnostic Trouble
Code (DTC) may be stored.
The PJB is located behind the A-pillar lower trim panel on the passenger side and receives its main
power supply from the BJB.
The BCM/GWM assembly is located adjacent to the PJB, and it is the main controller of the vehicle
body systems. The BCM/GWM assembly controlled functions are outlined in the relevant sections.
The BCM/GWM assembly software will monitor the state of charge of the battery and will determine
when a stop/start event can occur. It can also intervene to maintain vehicle systems by keeping the
engine running or initiating a restart due to, for example, climate control system requirements or
request for restart from the Engine Control Module (ECM). A brake pressure signal is received from
the ECM which will indicate to the BCM/GWM assembly that an engine restart is required from driver
operation of the foot brake. For additional information, refer to:
180 diesel XE R Sport, with many extras :D and working stop/start :lol: Made to work Feb 2019 by me


Phil
Posts: 408
Joined: Tue Feb 02, 2016 11:19 pm
Location: Monmouthshire

Re: Body control module

Post by Phil » Fri Nov 08, 2019 1:41 pm

The Body Control Module is a controller for general functions of the car, as the Power Control Module is to the engine, or the Transmission Control Module is to the gearbox. It does things like monitoring what doors are open/closed, controlling the lighting etc. - anything that is related to the general body of the car.


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Bazzamf
Posts: 467
Joined: Thu Aug 31, 2017 4:33 pm
Location: Bucks

Re: Body control module

Post by Bazzamf » Fri Nov 08, 2019 4:44 pm

Thanks to both Vespa and Phil for throwing some light on the subject for me and I am certain for others on this forum.
Bazzamf - XE 200 Ingenium Portfolio in Santorini Black


spritely
Posts: 393
Joined: Mon Sep 17, 2018 4:16 pm
Location: Llanon/Wales

Re: Body control module

Post by spritely » Fri Nov 08, 2019 7:13 pm

Bazzamf wrote:
Fri Nov 08, 2019 4:44 pm
Thanks to both Vespa and Phil for throwing some light on the subject for me and I am certain for others on this forum.
Spot on - I was wondering what it was/does too.

Mark
Corris Grey 180D R sport - loving it.


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