CAN COMMUNICATION SYSTEM(for LHD), Diagnostic DTC:U1111

DTC Code DTC Name
U1111 Lost Communication with Body No. 5 Module

DESCRIPTION

DTC Code DTC Detection Condition Trouble Area
U1111 There is no communication from the windshield wiper ECU.

  • Power source circuit of windshield wiper ECU

  • Windshield wiper ECU CAN branch wire or connector

  • Windshield wiper ECU

WIRING DIAGRAM

A01XADNE14

CAUTION / NOTICE / HINT

Note

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

Tech Tips

Operating the ignition 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 ignition 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:

      For vehicles with an SRS system:

      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 (WINDSHIELD WIPER ECU CAN BRANCH WIRE)


    1. A01X8A7E01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Windshield Wiper ECU)

      Disconnect the E85 windshield wiper ECU connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      E85-6 (CANH) - E85-5 (CANL) Ignition switch off 54 to 69 Ω

    NG

    REPAIR OR REPLACE WINDSHIELD WIPER ECU CAN BRANCH WIRE OR CONNECTOR (CANH, CANL)

    OK

  4. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER ECU - BATTERY AND BODY GROUND)


    1. A01X6Z2E01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Windshield Wiper ECU)

      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. Disconnect the E83 windshield wiper ECU connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      E83-5 (IG1I) - Body ground Ignition switch ON 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E85-10 (E) - Body ground Always Below 1 Ω

    OK

    REPLACE WINDSHIELD WIPER ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR