Diagnosis And Testing - PEM

WARNING: This page is about a different car, the 2012 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

The hard wired circuits between components related to the passive entry system and the Passive Entry Module (PEM) 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 PEM or the electronic controls and communication between modules and other devices that provide some features of the passive entry system or the PEM. The most reliable, efficient, and accurate means to diagnose the passive entry system, the PEM or the electronic controls and communication related to passive entry or PEM operation requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.