SECTION 06: ELECTRICAL
18
DOB 2490-2789 | X3-45 Commuter PA1605 Maintenance Manual (Final Version) – Sec 06 revised June 2017
CAUTION
AGM batteries should be replaced in pairs or
four at a time.
Replace only with AGM type batteries of the
same specification and capacity.
Prime system is programmed for the charging
capacity of the batteries installed.
Installing a higher capacity battery will affect
the battery life as the system will not fully
charge the batteries, which is detrimental to
battery performance.
Refer to “specifications” at the end of this
section for further details.
CAUTION
Ensure that connections are not reversed
when reinstalling batteries, since damage to
electrical system components will result.
NOTE
When reinstalling batteries, battery
connections must be tightened to 16 lbf-ft (200
lbf-in). A torque wrench is required to ensure
an accurate tightening torque.
DANGER
To prevent possible electric shock or sparking,
the battery master switch must be set to the
“off” position before tightening an electrical
connection.
NOTE
A protective coating should be applied on
certain power connections that have been
disconnected. Refer to procedure pr00002e
included at the end of this section to know the
recommended products and where they are
used.
2.4 BATTERY
RATING
Each of the 12 volt odyssey 31-pc2150s
batteries used on the vehicle has the following
rating:
Type:
absorbed
glass
mat
Terminal type:
top stud
Group size:
31
Volts:
12
Load test amperage (1/2 cca):
575
Reserve capacity (minutes):
205
Cold cranking (in amps) -at 0
o
f :
1150a
Maximum dimensions
Length (including flange):
13in/330mm
Width:
6.8in/173mm
Height (including top posts):
9.4in/239mm
Approximate weight:
77.8 lbs
Torque specifications
Battery post, battery terminal nut: 17 lbf-ft (200
lbf-in)
The reserve capacity is defined as the number
of minutes a new, fully charged battery at 80of
(26,6oc) can be discharged at 25 amperes and
maintain a minimum of 1.75 volts per cell (10.5
volts total for one 12 volts battery). This rating
can be used as a basis for determining how long
a vehicle might run after an alternator failure.
The cold cranking rating is defined as the
minimum discharge current a battery will deliver
in amperes for 30 seconds at 0of (-18oc) while
maintaining a minimum of 1.2 volts per cell (7.2
volts total for one 12 volts battery). This rating
can be used as a basis for comparing starting
performance.
2.5 BATTERY
MAINTENANCE
Several factors influence battery performance.
The methods and inspection procedures
proposed here will ensure your batteries are in
good shape.
Local procedures and instructions take
precedence over our proposed methods.
2.5.1 Visual
Inspection
1. Check the outside of the battery for a broken
or cracked cover or case that could permit
loss of electrolyte. If obvious physical
damage is noted, replace the battery. Also
check for wet areas around the terminals.
2. Check for loose terminal posts, cable
connections, damaged cables, and for
evidence of corrosion. Correct conditions as
required before proceeding with tests.
3. Check for damaged or loose battery tie-
downs.
