Pacifica V6-3.8L VIN L (2005)
Seat Track: Testing and Inspection
Passenger Power Seat Track
The most reliable, efficient, and accurate means to diagnose the power seat system requires the use of a DRB III(R) scan tool and the proper Diagnostic
Procedures information. The DRB III(R) scan tool can provide confirmation that the PCI data bus is functional, that all of 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 hard wired inputs and
relaying the proper hard wired outputs to perform its system functions.
Following are tests that will help to diagnose the hard wired components and circuits of 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 and all
of the electronic modules that provide inputs to, or receive outputs from the system components must be checked.
PRELIMINARY TESTS
1. Obtain a DRB III(R) scan tool and check for any stored diagnostic trouble codes recorded in the memory heated seat adjustable pedal module.
Follow the procedures called out in the proper diagnostic procedures 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 for circuit breaker diagnosis and testing procedure.
2. Check for proper battery or electrical system voltage. The CS is equipped with a low-voltage cutoff 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 System for testing instructions.
3. Obtain a DRB III(R) scan tool and energize each seat track motor axis one at a time. If any axis 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 a certain seat track 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 power seat track assembly. Refer to Wiring for complete circuit diagrams.