SECTION 06A: H3 SERIES ELECTRICAL
PA1621 Maintenance Manual All Series | January 2017
19
4.3 BATTERY DISCHARGE PROTECTION
To prevent discharge of the batteries when the
engine in not running, some functions are
automatically switched off if the batteries voltage
drops below 24.4 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 the
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.
4.4 MAIN BATTERY RELAYS
Main battery (master) relays (12V and 24V) are
provided for this vehicle. The relays are located
in the battery compartment and on the rear
electrical panel. The 24-volt battery relay (R1)
engages when ignition key is in the ON or ACC
position and battery master switch (master cut-
out) is flipped ON.
When the main battery relays (R1 & R3) are
turned 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;
ECM;
TCM (World transmission);
Preheater electronic timer;
Preheater and water recirculating pump;
Entrance door;
Radio memory;
Cluster memory.
4.5 BATTERY REMOVAL AND
INSTALLATION
1. Remove the battery compartment protective
cover.
DANGER
To prevent possible electric shocks or
sparking, the battery master switches should
be in the "Off" position before disconnecting
cables from the batteries.
2. Remove the supports, and unscrew terminal
nuts of each defective battery.
3. Remove battery cables from the batteries.
4. Remove batteries.
5. Installation is the reverse of removal.
Connect the red (24-volt) battery cables first,
then the yellow (12-volt) battery cables and
finish with the black (ground) cables.
NOTE
When the battery cables have been removed
from the batteries, wrap the battery terminals
and cable ends with electric tape to prevent
accidental grounding. The ground cables
should always be disconnected first and
replaced last.
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. A torque
wrench is required to ensure an accurate
tightening torque.
TORQUE: 13-15 lb-ft (18-20 Nm)
DANGER
To prevent possible electric shock or sparking,
the battery master switch must be set to the
“Off” position before tightening an electrical
connection.
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