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
Vehicle has 2 module communications networks. The Powertrain Control Module (PCM) and Passive Anti-Theft System (PATS) module are connected to the multiplex communications network through a pair of twisted wires or BUS (also referred to as Standard Corporate Protocol). The BUS consists of a (+) circuit No. 914 and a (-) circuit No. 915. The air bag diagnostic monitor and all other optional modules (Generic Electronic Module (GEM), Remote Anti-Theft Personality (RAP) module, 4-Wheel Anti-Lock Brake System (4WABS) module and 4-Wheel Air Suspension (4WAS) module) are connected to the Standard Corporate Protocol (ISO) 9141 diagnostic communications network through a single wire (circuit No. 70). Both networks are connected to the Data Link Connector (DLC).
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 Right Side Of Instrument Panel |
| Data Link Connector (DLC) | Below Left Side Of Instrument Panel, Right Of Steering Column |
| Generic Electronic Module (GEM) | Mounted On Instrument Panel Fuse Block |
| Passive Anti-Theft System (PATS) Module | Behind Instrument Cluster |
| Powertrain Control Module (PCM) | Right Side Of Engine Compartment |
| Remote Anti-Theft Personality (RAP) Module | Behind Left Side Of Instrument Panel |
| 4-Wheel Air Suspension (4WAS) Module | Behind Center Of Instrument Panel |
| 4-Wheel Anti-Lock Brake System (4WABS) Module | Left Side Of Engine Compartment |
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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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