Description & Operation
Vehicle has 2 module communications networks. The module communications network provides the ability for 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 network is also referred to as Standard Corporate Protocol (SCP). The BUS consists of a (+) circuit No. 914 and a (-) circuit No. 915. The BUS is routed throughout the vehicle to the Powertrain Control Module (PCM), Remote Climate Control (RCC) module and the Passive Anti-Theft System (PATS) module (if equipped). See Fig 1.
The Generic Electronic Module (GEM), Anti-lock Brake System (ABS) control module, Remote Anti-theft Personality (RAP) module, air bag diagnostic monitor and Semi-Active Ride Control (SARC) module do not use the BUS to communicate with other modules. These modules are connected to the International Standards Organization (ISO) 9141 diagnostic communications network through a single wire (circuit No. 70). See Fig 2. Both networks are connected to the Data Link Connector (DLC). This article is used to diagnose BUS and ISO communications network circuit faults. For module locations, see COMPONENT LOCATIONS table.
| Component | Location |
|---|---|
| Anti-Lock Brake System ABS) Module | In Engine Compartment, Under Battery |
| Air Bag Diagnostic Monitor | In Center Of Instrument Panel |
| Generic Electronic Module (GEM) | Attached To Under Side Of Instrument Panel Fuse Box |
| Passive Anti-Theft System PATS) Module | Behind Center Of Instrument Panel, Behind Integrated Control Panel |
| Powertrain Control Module (PCM) | On Right Side Of Firewall In Engine Compartment |
| Remote Anti-Theft Personality RAP) Module | Above Accelerator Pedal |
| Remote Climate Control RCC) Module | Behind Right Side Of Instrument Panel, Behind Glove Box |
| Semi-Active Ride Control SARC) Module | Right Side Of Luggage Compartment |