CAN COMMUNICATION SYSTEM (for RHD), 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

A01ESDRE17

INSPECTION PROCEDURE

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 (WINDSHIELD WIPER ECU CAN BRANCH WIRE)


    1. A01EQ9TE02
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Windshield Wiper ECU)

      Disconnect the E90 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
      E90-6 (CANH) - E90-5 (CANL) Engine 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. A01ERRCE02
      Text in Illustration
      *1

      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 E89 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
      E89-5 (IG1I) - Body ground Engine switch on (IG) 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E90-10 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE WINDSHIELD WIPER ECU Click here