![]() These modules must communicate amongst each other, in a bid to function as intended. 2005 Nissan Altima (affected by Nissan Service Bulletin pertaining to Code U1000) Additional modules found on most vehicles include a TCM (Transmission Control Module), and BCM (Body Control Module), among others. ![]() ![]() This data is then used to determine an engine’s fuel trims, and throttle plate positioning (on drive-by-wire systems). For example, an ECM (Engine Control Module) collects data from numerous temperature and pressure sensors, to monitor engine performance Today’s vehicles rely upon a complicated system of modules and wiring harnesses, to sustain the proper operation.Įach module within this system has its own specific purpose. To understand the meaning behind diagnostic trouble code U1000, you must first familiarize yourself with the inner workings of modern automotive communication systems. Isuzu: Class 2 Communication ID Not Learned.Infiniti: CAN Communication Line – Signal Malfunction.GM: Class 2 Communication Malfunction Conditions.The following are exact definitions of DTC U1000, per each individual manufacturer. ![]() However, most manufacturers use DTC U1000 to indicate a failure within a vehicle’s CAN (Communication Area Network) data bus system. Communication Malfunction (Manufacturer Specific)ĭue to its manufacturer-specific nature, the exact meaning of code U1000 can differ slightly from one brand to the next. ![]()
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