U1003 INFINITI - Lost Communication With VVEL Control Module
- Faulty Variable Valve Event & Lift (VVEL) Control Module
- VVEL Control Module harness is open or shorted
- VVEL Control Module circuit poor electrical connection
- Faulty Engine Control Module (ECM)
When is the code detected?CAN communication signal other than OBD (emission related diagnosis) is not received between Variable Valve Event & Lift (VVEL) control module and Engine Control Module (ECM) for 2 seconds or more.
- Engine Light ON (or Service Engine Soon Warning Light)
U1003 Infiniti DescriptionCAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Engine Control Module (ECM) and Variable Valve Event & Lift (VVEL) control module are connected with two communication lines (CAN H line and CAN L line) and transmit/receive data. ECM shares information and links with the VVEL control module during operation.
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