CAN COMMUNICATION SYSTEM (for RHD without Entry and Start System) Gateway ECU Communication Stop Mode

DESCRIPTION

Detection Item Symptom Trouble Area
Gateway ECU Communication Stop Mode

Either condition is met:


  • "CAN Gateway1" is not displayed on the "Bus Check" screen.

  • "Gateway ECU Communication Stop Mode" in "DTC Communication Table" applies.

  • Power source or inside network gateway ECU

  • Network gateway ECU CAN branch wire or connector

  • Network gateway ECU

WIRING DIAGRAM

A01DQ71E65

INSPECTION PROCEDURE

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. 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 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.

      • 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 (NETWORK GATEWAY ECU CAN BRANCH WIRE)


    1. A01DP7QE26
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Network Gateway ECU)

      Disconnect the G155 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
      G155-16 (CA1H) - G155-15 (CA1L) Ignition switch off 54 to 69 Ω

    NG

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

    OK

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


    1. A01DP7QE25
      Text in Illustration
      *a

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G155-4 (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
      G155-2 (BATT) - Body ground Always 11 to 14 V
      G155-10 (IG1) - Body ground Ignition switch ON 11 to 14 V
      G155-9 (IG2) - Body ground Ignition switch ON 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE NETWORK GATEWAY ECU Click here