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 memory system requires the use of a DRB III scan tool and the proper Diagnostic Procedures manual. The DRB III 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 functions.

1. If the driver power seat exhibits a interrupted or jerky motion, there is a possibility that the wires leading from the memory seat module to the memory seat motor are mis-wired. To check the concern, obtain a DRB III 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 mis-wired. Check the wiring to that axis (module to motor) Fix any wiring problems and retry that axis. Refer to Wiring Diagrams for complete circuit schematic or connector pin-out information.