Vehicle communication utilizes a high speed controller area network (HS-CAN), International Standards Organization (ISO) 9141 network and standard corporate protocol (SCP) network. Information is sent to and from individual control modules that each control specific functions. All 3 networks are connected to the data link connector (DLC). The DLC can be found under the instrument panel between the steering column and the audio unit.
The 3 module communication networks are
- ISO 9141
- Standard corporate protocol (SCP)
- High speed (HS) CAN
ISO 9141 is for diagnostic use only, while SCP and HS-CAN allow multiple modules to communicate, or transfer data, with each other on a common network. HS-CAN is used for module to module communication, as well as diagnostics. The HS-CAN network enables each module to share information with any module on the same network. Any module that is directly wired to a sensor may broadcast its data using a network message to any module requiring that information on the network.
Scheme 1
| Module Name | Network Type | Termination Module |
|---|---|---|
| Air suspension module (ASM) | HS-CAN | No |
| Anti-lock brake system (ABS) module | HS-CAN | No |
| Driver door module (DDM) | SCP | N/A |
| Driver seat module (DSM) (if equipped) | SCP | N/A |
| Electronic automatic temperature control (EATC) module | SCP | N/A |
| Instrument cluster (IC) (gateway module) | HS-CAN SCP | Yes N/A |
| Lighting control module (LCM) | SCP | N/A |
| Luggage compartment lid module (LCLM) (if equipped) | ISO 9141 | N/A |
| Navigation module (NAV) (if equipped) | SCP | N/A |
| Parking aid module (PAM) (if equipped) | ISO 9141 | N/A |
| Powertrain control module (PCM) | HS-CAN | Yes |
| Rear audio/climate control module (RAC) (if equipped) | SCP | N/A |
| Restraints control module (RCM) | ISO 9141 | N/A |