Signal Processing Module: Testing and Inspection

DIAGNOSIS AND TESTING - MODULE - VEHICLE SYSTEM INTERFACE

The hard wired input and output circuits between components related to the Vehicle System Interface Module (VSIM) (also known as the Vehicle Systems Integration Module/VSIM or the aftermarket module) may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, details of wire harness routing and retention, connector pin-out information and location views for the various wire harness connectors, splices and grounds.

However, conventional diagnostic methods will not prove conclusive in the diagnosis of the VSIM or the electronic controls and communication between modules and other devices that provide some features of the VSIM. The most reliable, efficient, and accurate means to diagnose the VSIM or the electronic controls and communication related to operation of the aftermarket systems connected through the VSIM requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.