Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Description & Operation: Notes
The module communications network provides the ability for a module-to-module communication by sharing inputs and outputs instead of each component having an input and output wired directly to each module. A BUS which consists of a pair of twisted wires is used to transfer information between each module. The BUS consists of a (+) circuit No. 914 and a (-) circuit No. 915. The BUS is routed throughout the vehicle to each module except the air bag diagnostic monitor. See Fig 1 . The air bag diagnostic monitor does not use the BUS to communicate with other modules. For module locations, see COMPONENT LOCATIONS TABLE. In the event that a system failure exists, a Diagnostic Trouble Code (DTC) will be stored in the module. A New Generation Star (NGS) scan tester and Data Link Connector (DLC) may be used for retrieving and clearing DTCs from the module. DTC may be used for system diagnosis.
| Component | Location | ||||
|---|---|---|---|---|---|
| Air Bag Diagnostic Monitor | Behind Instrument Panel, To Right Of Steering Column | ||||
| Anti-Lock Brake System (ABS) Control Module | Below Battery Tray At Driver's Side Front Corner Of Engine Compartment | ||||
| Cellular Phone Module (CPM) (1)(2) | In Trunk, On Panel Below Rear Window | ||||
| Data Link Connector (DLC) | Gray 16-Pin Connector Located Below Driver's Side Of Instrument Panel, Near Steering Column | ||||
| Driver's Door Module (DDM) | Inside Driver's Door | ||||
| Driver's Seat Module (DSM) | Below Driver's Side Front Seat | ||||
| Electronic Automatic Temperature Control (EATC) Module | Behind Instrument Panel, On A/C Evaporator Core Housing At Passenger's Side Of Vehicle | ||||
| Front Control Unit (FCU) | Behind Center Of Instrument Panel, On Radio | ||||
| Lighting Control Module (LCM) | On Instrument Panel, Behind Headlight Switch | ||||
| Powertrain Control Module (PCM) | In Passenger's Side Of Engine Compartment, On Firewall | ||||
| Remote Emergency Satellite Cellular Unit (RESCU) Module (2) | Passenger's Side Rear Corner Of Trunk, Behind Trim Panel, In Front Of Taillight Assembly | ||||
| Vehicle Dynamic Module (VDM) | In Driver's Side Of Trunk, On Panel Below Rear Window | ||||
| Virtual Image Instrument Cluster (VIC) | Center Of Driver's Side Instrument Panel | ||||
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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