Transmitter Operations; Battery Replacement - Mack Granite GU Series Operator's Handbook Manual

128 OPERATION

Transmitter Operations

The door transmitter has four buttons (labeled LOCK, UNLOCK, AUX and
HORN) to control operation of the system. When any of the buttons is
pressed, a coded Ultra-high frequency (UHF) radio signal is transmitted to
the receiver in the vehicle.
The transmitter must be within approximately 10 meters (33 feet) of the vehicle
for the receiver to detect the coded signal. The Remote Keyless Entry system
has no affect on the normal operation of the power door locks.
When the LOCK button is pressed, the doors will lock and the lights will flash
once indicating that the doors are locked. The dome light will be on for 5
seconds upon locking the door by remote. For audible confirmation of the
door lock, press the LOCK button a second time and the horn will beep once
to confirm the doors are locked.
When the UNLOCK button is pressed once, the drivers door will unlock and
the lights will flash twice indicating that the door is unlocked. The dome light
will be on for 30 seconds upon unlocking the door by remote. Pushing the
UNLOCK button a second time within 3 seconds will unlock both doors.
Note: If AUTO RE-ARM feature is selected, the keyless entry system will
automatically re-arm itself 60 seconds after the doors are unlocked with remote
transmitter. Automatic re-arm will cancel if any door is opened before the 60 seconds
timer has elapsed.
Press and hold the AUX button on the transmitter for 0.5 second to turn
perimeter or trailer access lights "On" or "Off" (if equipped).
Press and hold the HORN button on the transmitter for 3 seconds. The horn
will immediately sound and running lights will flash. During panic mode,
the normal function of this transmitter button will be suspended. LOCK and
UNLOCK buttons cannot be used to lock and unlock the doors. To stop the
alarm, press and hold the HORN button on the transmitter again for 3 seconds.
If the button is not pressed, the alarm will automatically stop after 60 seconds.

Battery Replacement

Under normal use, the transmitter battery should last approximately two years.
When battery replacement becomes necessary, use a Panasonic 3 volt, type
CR2032, or equivalent. Replace the battery as follows:
1. Open the transmitter by inserting a dime between the two halves of the
transmitter case (near the key ring hole) and twisting.