ECD SYSTEM(w/ Urea SCR System), Diagnostic DTC:U1103

DTC Code DTC Name
U1103 Lost Communication with Stop and Start Control Module

DESCRIPTION

The ECM and engine stop and start ECU send and receive signals via CAN communication.

If a communication error occurs between the ECM and engine stop and start ECU, the ECM stores this DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
U1103 Lost Communication with Stop and Start Control Module There is no communication between the ECM and engine stop and start ECU (1 trip detection logic).

  • ECM

  • Engine Stop and Start ECU

  • CAN Communication System

 - DTC stored

CONFIRMATION DRIVING PATTERN

DTC No. DTC Detection Drive Pattern
U1103 Ignition switch ON for 5 seconds or more

CAUTION / NOTICE / HINT

Tech Tips

Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.

PROCEDURE


  1. CHECK DTC OUTPUT (DTC U1103)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Trouble Codes.

    5. Read the DTCs using the GTS.


      Powertrain > Engine > Trouble Codes
      Result
      Result Proceed to
      DTC U1103 is not output A
      DTC U1103 is output B

    A

    CHECK FOR INTERMITTENT PROBLEMS Click here

    B

    GO TO CAN COMMUNICATION SYSTEM for LHD (w/ Centrl Gateway ECU) Click here for RHD (w/ Centrl Gateway ECU) Click here for LHD (w/o Centrl Gateway ECU) Click here for RHD (w/o Centrl Gateway ECU) Click here