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U1003 INFINITI

U1003 INFINITI - Lost Communication With VVEL Control Module

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

  • 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.

    Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • U1003 Infiniti Description

    CAN (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.
    OBDII Code U1003 Infiniti - Lost Communication With VVEL Control Module - AutoCodes.com

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