CAN COMMUNICATION SYSTEM 4WD Control ECU Communication Stop Mode

DTC Code DTC Name
4WD Control ECU Communication Stop Mode

DESCRIPTION

Detection Item

Symptom

Trouble Area

4WD Control ECU Communication Stop Mode

Either condition is met:

  • "Four Wheel Drive Control" is not displayed on the "Bus Check".

  • "4WD Control ECU Communication Stop Mode" in "DTC Combination Table" applies.

  • Power source circuit of four wheel drive control ECU

  • Four wheel drive control ECU branch line or connector

  • Four wheel drive control ECU

WIRING DIAGRAM

C263741E01

CAUTION / NOTICE / HINT

Note:

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

Tip:

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 main wire and the branch wire.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS 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 hereClick hereClick here

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

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      Result

      Result

      NEXT
    NEXT

  2. CHECK OPEN IN CAN BUS WIRE (FOUR WHEEL DRIVE CONTROL ECU BRANCH WIRE)

    1. C213047C01

      *a

      Rear view of wire harness connector

      (to Four Wheel Drive Control ECU)

      Disconnect the G41 four wheel drive control ECU connector.

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

      Standard Resistance

      Tester Connection

      Switch Condition

      Specified Condition

      G41-19 (CANH) - G41-20 (CANL)

      Engine switch off

      54 to 69 Ω

      Result

      Result

      OK

      NG
    NG

    REPAIR OR REPLACE FOUR WHEEL DRIVE CONTROL ECU BRANCH WIRE OR CONNECTOR (CANH, CANL)

    OK

  3. CHECK HARNESS AND CONNECTOR (FOUR WHEEL DRIVE CONTROL ECU - BATTERY AND BODY GROUND)

    1. C212983C01

      *a

      Rear view of wire harness connector

      (to Four Wheel Drive Control 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 hereClick hereClick hereClick here

    2. Disconnect the G42 four wheel drive control ECU connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G42-4 (GND) - 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

      G42-3 (IG) - Body ground

      Engine switch on (IG)

      11 to 14 V

      Result

      Result

      OK

      NG
    OK

    REPLACE FOUR WHEEL DRIVE CONTROL ECU

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR