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8Ns - 34
POWER SEAT SYSTEM
RECLINER MOTOR (Continued)
Fig. 5 Power Seat Recliner and Track - Typical
1 - Seat Back Frame
2 - Seat Cushion Foam
3 - Recliner Motor
4 - Seat Cushion Frame
5 - Shield
6 - Power Seat Track
The driver side power seat recliner motor used on
models equipped with the memory system also has a
position potentiometer integral to the motor assem-
bly, which electronically monitors the motor position.
DIAGNOSIS AND TESTING - RECLINER MOTOR
The most reliable, efficient, and accurate means to
diagnose the power seat 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
the electronic modules are sending and receiving the
proper messages on the PCI data bus network, and
that the power seat system is receiving the proper
scan tool can provide
hard wired inputs and relaying the proper hard
wired outputs to perform system functions.
Following are tests that will help to diagnose the
components and circuits in the power seat system.
However, these tests may not prove conclusive. In
order to obtain conclusive testing of the power seat
system, the Programmable Communications Interface
(PCI) data bus network must be checked.
PRELIMINARY TESTS
(1) Obtain a DRB III scan tool and check for any
stored diagnostic trouble codes recorded in the mem-
ory (heated) seat adjustable pedal module. Follow the
procedures called out in the proper diagnostic proce-
dures manual to resolve if codes are present.
(1) If any power seat is not operational in any
direction, check the power seat circuit breaker,
located in the Integrated Power Module. If OK, go to
Step 2. Refer to the Power Distribution section for
circuit breaker diagnosis and testing procedure.
(2) Check for proper battery or electrical system
voltage. The CS is equipped with a low-voltage cut-
off feature. If the electrical system voltage drops
below a predetermined set-point (approx. 11.5v), the
power seat system will not function until the proper
system voltage has been restored. If OK, go to Step
4. Refer to the Battery System and/or Charging Sys-
tem section for testing instructions.
(3) Obtain a DRB III scan tool and energize the
recliner motor. If the motor stops without hitting the
end of travel, the potentiometer signal for that axis
may have an open, short or be mis-wired. Check the
wiring to that axis (module to motor). Fix any wiring
problems and retry that axis. If the recliner motor is
inoperational, apply 12v and a good ground source to
the inop motor. If the motor does not operate in
either direction replace the recliner motor assembly.
Refer to Wiring for complete circuit diagrams.
REMOVAL
(1) Remove the seat back. Refer to the Body sec-
tion for the procedure.
(2) Disengage J-strap at base of seat cushion.
(3) Roll seat cushion cover upward to access bolts
attaching recliner to seat back frame.
(4) Remove bolts attaching recliner to seat back
frame.
(5) Separate recliner from seat.
INSTALLATION
(1) Position recliner assembly on seat frame.
(2) Install bolts attaching recliner to seat back
frame and tighten to 28 N·m (20 ft. lbs.).
(3) Roll seat cover downward.
(4) Engage J-strap at base of seat cushion.
(5) Install the seat back. Refer to the Body section
for the procedure.
CS
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