Chrysler 300M 1999, Manual, Page: 21 / 766

3.10.2 Memory Seat Glide
The intent of this feature is to allow for easier entry and exit to the vehicle by moving the seat
rearward a short distance when the operator turns the ignition off. The seat returns to its original
position when the operator returns and turns on the ignition or extends the seat belt. If any seat
movement is initiated, whether manual or by memory recall, after the ignition has been turned off,
that will cancel any ensuing glide to enter movement until the next ignition cycle.
This feature can be enabled/disabled by the owner by holding the memory set button and
simultaneously pressing the horizontal rearward switch. To reinstate the feature, repeat the
process. This can also be done using the DRB which will also inform as to which state it is in.
3.10.3 Guard Bands
The module provides guard bands which prevent the seat track from hitting the hard limits of the
given seat axis during manual power seat operation. The guard band values for each hard limit
are stored in EEPROM. The guard band can be bypassed by running the seat to the end of its
travel and then releasing the switch and pressing it again. The seat will move a short distance
further. Once the seat is past the guard band it can be stored in memory, but if recall is initiated
the seat will move to the guard bands and no further.
3.10.4 Memory Mirrors
Each outside mirror has a vertical and a horizontal position sensor. The MHSMM provides a 5-volt
reference to each position sensor. The sensors share a common ground circuit. The MHSMM
monitors the position of the mirrors by measuring the voltage of each signal. When a memory
position is set, the MHSMM monitors and stores the position of the outside mirrors. The MHSMM
adjusts the mirrors to the appropriate positions when a memory recall message is received from
the RKE or is requested from the memory switch.
The power mirror switch during non-memory operation operates both mirrors independently of the
MHSMM.
3.10.5 Heated Seats
The controls for the heated seats are located on the side of each seat. The system offers two seat
temperature settings of approximately 37°C (98.6°F) (LO) and approximately 42°C (107.6°F) (HI).
As the temperature in the seat rises, the Negative Temperature Coefficient (NTC) resistance
decreases and the voltage reading detected by the MHSMM increases. The seat heater output is
deactivated once the voltage reading reaches it’s upper threshold for either setting, high or low.
As the temperature decreases, the voltage reading decreases until the lower threshold is reached
for either setting high or low. At this point the seat heat output is activated once again and this
cycle repeats itself as long as the seat heat request is on. The thresholds for low and high settings
are pre-programmed into the MHSMM memory.
The heated seat switch contain resistors pulled up to ignition which are processed by the MHSMM
as voltage readings indicating desired heat setting high or low.
3.11 Overhead Travel Information System (OTIS)/Homelink
The overhead travel information system (OTIS) gives the driver information that supplements the
primary gauge instrumentation. OTIS displays this information on a vacuum fluorescent display
(VFD). The OTIS module has four switch inputs. The buttons for these switches are integral to the
OTIS housing. There are two buttons on each side of the OTIS. The buttons are labeled US/M,
C/T, STEP, and RESET. The driver selects and resets display functions through the use of these
four buttons. The OTIS will display these functions:
G
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