CAN COMMUNICATION SYSTEM (for LHD with Entry and Start System), 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 or inside of parking assist ECU

  • Parking assist ECU CAN branch wire or connector

  • Parking assist ECU

WIRING DIAGRAM

A01DQCKE05

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. 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 airbag system.

      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.

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


    NEXT

  2. CHECK FOR OPEN IN CAN BUS WIRE (PARKING ASSIST ECU CAN BRANCH WIRE)


    1. A01DN7UE10
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Parking Assist ECU)

      Disconnect the I7 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
      I7-40 (CANH) - I7-39 (CANL) Engine switch off 54 to 69 Ω

    NG

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

    OK

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


    1. A01DU1TE08
      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 I6 parking assist ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I6-4 (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
      I6-1 (+B) - Body ground Always 11 to 14 V
      I6-8 (IG) - Body ground Engine switch on (IG) 11 to 14 V
      I6-9 (ACC) - Body ground Engine switch on (ACC) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE PARKING ASSIST ECU Click here