Diagnosis And Testing - Memory Seat System; Standard Procedure - Memory System Programming; Memory Set Switch Description - Chrysler 300M Service Manual

8N - 14 POWER SEATS
POWER SEATS (Continued)
the dome lamp does not dim, proceed with testing of
the individual components and circuits.
TESTING VOLTAGE TO SEAT
The following test will determine whether or not
voltage is continuous through the body harness to
the seat switch.
(1) Remove the front seat cushion side shield from
the seat to be tested. Refer to Body for the procedure.
(2) Using a voltmeter, connect the ground lead to
Pin 5 and positive lead to Pin 1 of the seat switch
connector. If battery voltage is present circuit is OK.
If no voltage is present check circuit breaker and
repair as necessary.
TESTING CIRCUIT BREAKER
Find correct circuit breaker in junction/fuse block.
Pull out slightly but be sure that circuit breaker ter-
minals still contact terminals in fuse block. Connect
ground wire of voltmeter to a good ground. With
probe of voltmeter positive wire, check both termi-
nals of circuit breaker for battery voltage. If only one
terminal checks at battery voltage, circuit breaker is
defective and must be replaced. If neither terminal
shows battery voltage, check for open or shorted cir-
cuit to circuit breaker.
DIAGNOSIS AND TESTING - MEMORY SEAT
SYSTEM
In order to obtain conclusive testing of the memory
system, the Programmable Communications Interface
(PCI) data bus network and all of the electronic mod-
ules that provide inputs to, or receive outputs from
the memory system components must be checked.
The most reliable, efficient, and accurate means to
diagnose the memory system requires the use of a
DRB III scan tool and the proper Diagnostic Proce-
dures manual. The DRB III
confirmation that the PCI data bus is functional, that
all of the electronic modules are sending and receiv-
ing the proper messages on the PCI data bus, and
that the memory system is receiving the proper hard
wired inputs and relaying the proper hard wired out-
puts to perform its functions.
STANDARD PROCEDURE - MEMORY SYSTEM
PROGRAMMING
The Memory Heated
(MHSMM) interfaces with the RKE vial the Pro-
grammable Communication Interface (PCI) bus. The
proper procedure of setting and recalling a memory
position using the RKE is as follows:
(1) Press memory switch 1 and release to recall
memory position 1.
(2) Adjust the seat, recliner, set radio station pre-
sets and side view mirrors to the desired position.
scan tool can provide
Seat Mirror Module
(3) Press momentarily and release memory switch
S.
(4) Press momentarily and release memory switch
1 or 2.
(5) Press and release the LOCK button on one of
the RKE transmitters. Do NOT press any switch for
10 seconds.
To program the second driver's position, repeat the
above procedure using memory switch 2. The second
RKE transmitter can be programmed in the same
fashion.
NOTE: The module will abort a recall if the trans-
mission is moved out of park or if any seat move-
ment is activated whether manually or by memory
recall.
To recall either of the programmed positions
momentarily press and release either memory selec-
tor switch 1 or 2. If using RKE, just press and
release the UNLOCK button on the proper transmit-
ter for either position 1 or 2.
A recall is possible any time the vehicle transmis-
sion is in PARK. This condition is monitored by the
MHSMM.
MEMORY SET SWITCH
DESCRIPTION
Fig. 1 Memory and Heated Seat Switches
1 - MEMORY SET SWITCH ASSEMBLY
2 - MEMORY SET BUTTON
3 - HEATED SEAT SWITCH
4 - LED'S
5 - MEMORY POSITION SELECT BUTTONS
The memory set/selector switch is mounted on the
drivers seat cushion side shield (Fig. 1), within easy
reach of the driver. This switch is used to set new
and recall preset memory positions of seat, seat
recliner, and the side view mirrors.
The memory set switch cannot be repaired or
adjusted. If one switch is damaged or faulty, the
entire memory set switch must be replaced.
LH