CAN COMMUNICATION SYSTEM(for LHD with Entry and Start System), Diagnostic DTC:U1115

DTC Code DTC Name
U1115 Lost Communication with Tilt and Telescopic Module

DESCRIPTION

DTC Code DTC Detection Condition Trouble Area
U1115 There is no communication from the multiplex tilt and telescopic ECU.

  • Power source or inside multiplex tilt and telescopic ECU

  • Multiplex tilt and telescopic ECU CAN branch wire or connector

  • Multiplex tilt and telescopic ECU

WIRING DIAGRAM

B001FCIE02

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. 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 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 OPEN IN CAN BUS WIRE (MULTIPLEX TILT AND TELESCOPIC ECU BRANCH WIRE)


    1. A01XEJ1E02
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Multiplex Tilt and Telescopic ECU)

      Disconnect the G116 multiplex tilt and telescopic ECU connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G116-5 (CANP) - G116-14 (CANN) Engine switch off 54 to 64 Ω

    NG

    REPAIR OR REPLACE MULTIPLEX TILT AND TELESCOPIC ECU CAN BRANCH WIRE OR CONNECTOR (CANP, CANN)

    OK

  3. CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - BATTERY AND BODY GROUND)


    1. A01XDY7E03
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Multiplex Tilt and Telescopic 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. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      G116-11 (GND) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      G116-2 (+B) - Body ground Always 11 to 14 V
      G116-9 (ECUB) - Body ground Always 11 to 14 V
      G116-8 (IG) - Body ground Engine switch on (IG) 11 to 14 V

    OK

    REPLACE MULTIPLEX TILT AND TELESCOPIC ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR