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 Passenger's Seat Module (PSM). See Fig 1 . The PSM 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 | ||
|---|---|---|---|
| Anti-Lock Brake System (ABS) Control Module | Below Battery Tray At Driver's Side Front Corner Of Engine Compartment | ||
| Cellular Phone Module (CPM) (1) | In Trunk, On Panel Below Rear Window | ||
| Data Link Connector (DLC) | Below Driver's Side Of Instrument Panel, To Right Of 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 | On A/C Evaporator Core Housing At Passenger's Side Of Vehicle | ||
| Hybrid Electronic Instrument Cluster (HEIC) | Center Of Driver's Side Instrument Panel | ||
| Message Center (MC) Indicator Module | Center Of Instrument Panel | ||
| Passenger's Seat Module (PSM) | Below Passenger's Side Front Seat | ||
| Powertrain Control Module (PCM) | Below Driver's Side Of Instrument Panel, To Left Of Steering Column | ||
| Steering Column/Ignition/Lighting Control (SCIL) Module | Behind Passenger's Side Of Instrument Panel, To Right Of Glove Box | ||
| Variable Load Control Module (VLCM) | Behind Passenger's Side Front Fender, In Front Of Wheel Opening | ||
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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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