CAN COMMUNICATION SYSTEM(for LHD), Diagnostic DTC:U1114

DTC Code DTC Name
U1114 Lost Communication with Main Switch Module

DESCRIPTION

DTC Code DTC Detection Condition Trouble Area
U1114 There is no communication from the outer mirror switch assembly.

  • Power source or inside outer mirror switch assembly

  • Outer mirror switch assembly CAN branch wire or connector

  • Outer mirror switch assembly

WIRING DIAGRAM

A001A33E02

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

Tech Tips

Operating the engine switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.

PROCEDURE


  1. PRECAUTION

    Note

    After turning the engine switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work Click here.


    NEXT

  2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL


    1. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the CAN main wire and the CAN branch wire.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

      Note

      When disconnecting the cable, some systems need to be initialized after the cable is reconnected Click here.


    NEXT

  3. CHECK FOR OPEN IN CAN BUS WIRE (OUTER MIRROR SWITCH ASSEMBLY CAN BRANCH WIRE)


    1. A0019ATE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Outer Mirror Switch Assembly)

      Disconnect the outer mirror switch assembly connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      L6-2 (CANP) - L6-3 (CANN) Engine switch off 54 to 69 Ω

    NG

    REPAIR OR REPLACE OUTER MIRROR SWITCH ASSEMBLY CAN BRANCH WIRE OR CONNECTOR (CANP, CANN)

    OK

  4. CHECK HARNESS AND CONNECTOR (OUTER MIRROR SWITCH ASSEMBLY - BATTERY AND BODY GROUND)


    1. A0019V1E02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Outer Mirror Switch Assembly)

      Connect the cable to the negative (-) battery terminal.

      Note

      When disconnecting the cable, some systems need to be initialized after the cable is reconnected Click here.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      L6-12 (B) - Body ground Always 11 to 14 V
      L6-11 (IG) - Body ground Engine switch on (IG) 11 to 14 V

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      L6-1 (E) - Body ground Always Below 1 Ω

    OK

    REPLACE OUTER MIRROR SWITCH ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR