CAN COMMUNICATION SYSTEM(for LHD), Diagnostic DTC:U110B

DTC Code DTC Name
U110B Lost Communication with Parking Assist Control Module "B"

DESCRIPTION

DTC Code DTC Detection Condition Trouble Area
U110B There is no communication from the parking assist ECU.

  • Power source circuit of parking assist ECU

  • Parking assist ECU CAN branch wire or connector

  • Parking assist ECU

WIRING DIAGRAM

A01X044E02

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 (PARKING ASSIST ECU CAN BRANCH WIRE)


    1. A01X0Q6E01
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Parking Assist ECU)

      Disconnect the F76 parking assist ECU connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F76-40 (CANH) - F76-39 (CANL) Ignition switch off 54 to 69 Ω

    NG

    REPAIR OR REPLACE PARKING ASSIST ECU CAN BRANCH WIRE OR CONNECTOR (CANH, CANL)

    OK

  4. CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - BATTERY AND BODY GROUND)


    1. A01XBPOE01
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Parking Assist 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 F75 parking assist ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F75-4 (GND1) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      F75-1 (+B) - Body ground Always 11 to 14 V
      F75-9 (ACC) - Body ground Ignition switch ACC 11 to 14 V
      F75-8 (IG) - Body ground Ignition switch ON 11 to 14 V

    OK

    REPLACE PARKING ASSIST ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR