CAN COMMUNICATION SYSTEM(for RHD), Diagnostic DTC:U0147

DTC Code DTC Name
U0147 Lost Communication with Gateway "B"

DESCRIPTION

DTC Code DTC Detection Condition Trouble Area
U0147 There is no communication from the network gateway ECU.

  • Power source or inside of network gateway ECU

  • Network gateway ECU CAN branch wire or connector

  • Network gateway ECU

WIRING DIAGRAM

A000VFNE22
*a No. 5 Junction Connector
*b from P-IG1 Relay
*c Network Gateway ECU

CAUTION / NOTICE / HINT

Note

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

Tech Tips

Operating the power 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 power 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 AUXILIARY 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 (NETWORK GATEWAY ECU CAN BRANCH WIRE)


    1. A000THQE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Network Gateway ECU)

      Disconnect the network gateway ECU connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      L102-16 (CA1H) - L102-15 (CA1L) Power switch off 54 to 69 Ω

    NG

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO NETWORK GATEWAY ECU (CA1H, CA1L)

    OK

  4. CHECK HARNESS AND CONNECTOR (NETWORK GATEWAY ECU - BATTERY AND BODY GROUND)


    1. A000VBGE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Network Gateway 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 voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      L102-10 (IG1) - Body ground Power switch on (IG) 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L102-4 (GND) - Body ground Always Below 1 Ω

    OK

    REPLACE NETWORK GATEWAY ECU

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR