CONTINUOUSLY VARIABLE TRANSAXLE 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

1. Diagnosis Condition 2. Malfunction Status 3. Malfunction Time 4. Other


  1. The engine switch is on (IG).

  2. There is no communication between the ECM and engine stop and start ECU.

  3. 1.25 seconds or more

  4. 1-trip detection logic

  • ECM

  • Engine Stop and Start ECU

  • CAN Communication System

 Does not come on DTC stored

CAUTION / NOTICE / HINT

Tech Tips

After performing repair, clear the DTCs and perform the following procedure to check that DTCs are not output.


  1. Turn the engine switch (IG) on and wait for 2 seconds or more.

  2. Check for DTCs again.

    Click here

PROCEDURE


  1. CLEAR DTC AND PERFORM ROAD TEST


    1. Clear the DTCs.


      Powertrain > Engine > Clear DTCs

      Tech Tips

      Write down any currently output DTCs before clearing them.

    2. Start the engine and drive the vehicle at a low speed.

      Result
      Proceed to
      NEXT

    NEXT

  2. CHECK DTC OUTPUT (DTC U1103)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

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


      Powertrain > Engine > Trouble Codes

    5. Read the DTCs using the GTS.

      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 Click here