Chrysler PT Cruiser, Руководство по обслуживанию и ремонту, Страница: 475 / 2078

DIAGNOSIS AND TESTING - POWER SEAT
SYSTEM
Before any testing of the power seat system is
attempted, the battery should be fully-charged and
all wire harness connections and pins cleaned and
tightened to ensure proper continuity and grounds.
Refer to the appropriate wiring information. The wir-
ing information includes wiring diagrams, proper
wire and connector repair procedures, further details
on wire harness routing and retention, as well as
pin-out and location views for the various wire har-
ness connectors, splices and grounds.
(1) If all power seats are inoperative, check the
automatic resetting circuit breaker in the Junction
Block (JB). Refer to the Power Distribution section of
this manual for the diagnosis and testing procedure.
(2) With the dome lamp on, apply the power seat
switch in the direction of the failure.
(3) If the dome lamp dims, the seat or the power
seat track may be jammed. Check under and behind
the seat for binding or obstructions.
(4) If the dome lamp does not dim, proceed with
testing of the individual power seat system compo-
nents and circuits.
DRIVER SEAT SWITCH
DESCRIPTION
A single two-way momentary power seat switch is
located on the outboard seat cushion side shield of
the drivers front seat. The power seat switch is
secured to the back of the seat cushion side shield
with two screws, and the switch paddle protrudes
through a hole to the outside of the shield. The
switch paddle is located in a shallow depression
molded into the outer surface of the seat cushion side
shield that helps to shroud it from unintentional
actuation when entering or exiting the vehicle.
The power seat switch cannot be adjusted or
repaired and, if faulty or damaged, it must be
replaced.
OPERATION
When the power seat switch paddle is actuated, a
battery feed and a ground path are applied through
the switch contacts to the power seat track adjuster
motor. The motor operates to move the seat track
adjuster through its drive unit in the selected direc-
tion until the switch is released, or until the travel
limit of the adjuster is reached. When the switch is
moved in the opposite direction, the battery feed and
ground path to the motor are reversed through the
switch contacts. This causes the motor to run in the
opposite direction.
The power seat switch should not be held applied
in either direction after the adjuster has reached its
travel limit. The power seat adjuster motor contains
a self-resetting circuit breaker to protect it from over-
load. However, consecutive or frequent resetting of
the circuit breaker must not be allowed to continue,
or the motor may be damaged.
DIAGNOSIS AND TESTING - DRIVER SEAT
SWITCH
For complete circuit diagrams, refer to Wiring
Diagrams.
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the power seat switch from the out-
board seat cushion side shield. Refer to Power Seat
Switch in the Removal and Installation section of
this group for the procedure.
(3) Use an ohmmeter to test the continuity of the
power seat switch in each switch position. See the
Power Seat Switch Continuity chart (Fig. 2). If OK,
refer to the Seat Track Diagnosis and Testing sec-
tion of this group. If not OK, replace the faulty power
seat switch.
POWER SEAT SWITCH
SWITCH POSITION CONTINUITY BETWEEN
Off 2-4, 3-5
UP 3-5, 4-6
DOWN 2-4, 3-6
Fig. 2 POWER SEAT SWITCH CONTINUITY CHART /
SWITCH PIN-OUT
PT
POWER SEAT SYSTEM 8N - 13
POWER SEAT SYSTEM (Continued)