SECTION 06: ELECTRICAL
16
DOB 2490-2789 | X3-45 Commuter PA1605 Maintenance Manual (Final Version) – Sec 06 revised June 2017
FIGURE 15: BATTERY COMPARTMENT OVERVIEW
2.1
BATTERY DISCHARGE PROTECTION
To prevent discharge of the batteries when the
engine in not running, certain functions are
automatically switched off if the battery voltage
drops below 24 volts for more than 30 seconds.
The "battery voltage warning" pictogram will
show on the DID. Set the ignition key to the off
position and then turn the ignition key to the on
position to reactivate these functions for a period
of 30 seconds before they switch off again.
If a prolonged use of the functions with the
engine not running is necessary, connect the
battery to a charger.
2.2
MAIN BATTERY RELAYS
Main battery (master) relays (12v and 24v) are
provided for this vehicle. The relays are located
in the battery compartment and in the rear
electrical panel. The 24-volt battery relay (r1)
engages when ignition switch is in the on or acc
position and battery master switch (master cut-
out) is turned on.
When the main battery relays (r1 & r3) are
tripped to the
off
position, all electrical supply
from the batteries is cut off, with the exception of
the following items.
Battery equalizer check module;
MCM;
TCM
ECM (engine control module),
Water recirculating pump;
Bi-fold entrance door;
Cluster
memory.
Communication radio (depending on chosen
jumper configuration)
2.3
BATTERY REMOVAL AND
INSTALLATION
The batteries are located in the battery
compartment on the R.H. side of the engine
compartment and are accessible from the
engine compartment curb-side door.
AGM batteries should be replaced in pairs or
four at a time.
