Diagnostic Strategies

In order to obtain conclusive testing of the memory system, the Programmable Communications Interface (PCI) data bus network and all of the electronic modules 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 driver side power seat with the memory system option requires the use of a DRBIII(R) or equivalent scan tool and the proper Diagnostic Procedures information. The DRBIII� 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, and that the memory system is receiving the proper hard wired inputs and relaying the proper hard wired outputs to perform its driver side power seat functions.

1. If the driver power seat exhibits an interrupted or jerky motion, ensure the wire harness is connected correctly. To verify the concern, obtain a DRB Ill� or equivalent scan tool and energize each axis one at a time. If any axis stops in approximately 2 seconds (without hitting the end of travel), the feedback for that axis may have an open, short or be incorrectly connected. Check the wiring to that axis (module to motor). Repair any wiring problems and retry that axis. Refer to the appropriate wiring information for complete circuit schematic or connector pin-out information.