track
or
recliner
adjuster
motor.
The
selected
adjuster motor operates to move the seat track or
recliner 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 adjuster motor to
run in the opposite direction.
See the owner’s manual in the vehicle glove box for
more information on the features, use and operation
of the power seat system.
DIAGNOSIS AND TESTING - POWER SEAT
SYSTEM
WARNING: SOME VEHICLES ARE EQUIPPED WITH
SEAT
MOUNTED,
SIDE
AIRBAGS.
BEFORE
ATTEMPTING TO DIAGNOSE OR SERVICE ANY
SEAT OR POWER SEAT SYSTEM COMPONENT
YOU MUST FIRST DISCONNECT AND ISOLATE THE
BATTERY NEGATIVE CABLE. THEN WAIT TWO MIN-
UTES FOR THE SYSTEM CAPACITOR TO DIS-
CHARGE BEFORE FURTHER SYSTEM SERVICE.
THIS IS THE ONLY SURE WAY TO DISABLE THE
AIRBAG SYSTEM. FAILURE TO DO SO COULD
RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT
AND POSSIBLE PERSONAL INJURY.
Before any testing of the power seat system is
attempted, the battery should be fully-charged and
all of the power seat system wire harness, connec-
tions and pins checked for damage. For complete cir-
cuit diagrams, refer to Wiring Diagrams.
With the dome lamp on, apply the power seat
switch in the direction of the failure. If the dome
lamp dims, the seat may be jamming. Check under
and behind the seat for binding or obstructions. If
the dome lamp does not dim, proceed with testing of
the individual components and circuits in the power
seat system.
VOLTAGE TEST
The following test will determine whether or not
voltage is continuous through the body harness and
to the seat switch.
(1) Remove the front seat cushion side shield from
the seat to be tested. Refer to the Body section of the
service manual 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.
CIRCUIT BREAKER TEST
Find correct circuit breaker on fuse block. Pull out
slightly but be sure that circuit breaker terminals
still contact terminals in fuse block. Connect ground
wire of voltmeter to a good ground. With probe of
voltmeter positive wire, check both terminals of cir-
cuit breaker for battery voltage. If only one terminal
checks at battery voltage, circuit breaker is defective
and must be replaced. If neither terminal shows bat-
tery voltage, check for open or shorted circuit to cir-
cuit breaker.
DRIVER SEAT SWITCH
DESCRIPTION
Vehicles equipped with power seats utilize a eight-
way power seat switch. Hard-top models utilize an
power seat switch with two knobs ganged together on
the outboard seat cushion side shield. Convertible
models utilize an power seat switch with three knobs
ganged together. The switches are secured to the
back of the seat cushion side shield with two screws.
However, the control knobs for the hard-top eight-
way power seat switch unit must be removed before
the seat switch can be removed from the side shield.
The power seat can be adjusted in eight different
ways using either of the power seat switches. The
power seat can be adjusted up, down, forward, rear-
ward, front up, front down, rear up and rear down,
using either of the power seat switches.
The individual switches in the power seat switch
module cannot be repaired. If one switch is damaged
or faulty, the entire power seat switch module must
be replaced. Refer to the owner’s manual in the vehi-
cle glove box for more information on the power seat
switch functions and the seat adjusting procedures.
OPERATION
When a power seat switch control knob or knobs
are actuated, a battery feed and a ground path are
applied through the switch contacts to the power seat
track
or
recliner
adjuster
motor.
The
selected
adjuster motor operates to move the seat track or
recliner 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 adjuster motor to
run in the opposite direction.
No power seat switch should be held applied in any
direction after the adjuster has reached its travel
limit. The power seat adjuster motors each contain a
self-resetting circuit breaker to protect them from
overload. However, consecutive or frequent resetting
JR
POWER SEAT SYSTEM
8N - 11
POWER SEAT SYSTEM (Continued)