Development of Controller Diagnostic System Based on ODX

OBD is an important technology for insurance of automotive safety and emission. The requirement for automotive safety and emission is getting higher, so more attention has been paid on OBD technology. The paper presents an instruction to the development of controller diagnostic system based on ODX (Open Diagnostic Data Exchange). According to the property of ECU I/O signals, using this method to build a diagnostic model of BCM (Body Control Module) in a certain automotive. The test results show the diagnostic model based on ODX is easy to embed, and will help OEM or after-sales tool supplier to explore their diagnostic tools.