Can Communication System (For Rhd Without Central Gateway Ecu) Ecm Communication Stop Mode

Power Source Network. Land Cruiser. Urj200, 202 Grj200 Vdj200
Networking. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FOR OPEN IN CAN BUS WIRE (ECM CAN MAIN WIRE)

CHECK HARNESS AND CONNECTOR (ECM - BATTERY AND BODY GROUND)

CAN COMMUNICATION SYSTEM (for RHD without Central Gateway ECU) - ECM Communication Stop Mode


DESCRIPTION


Detection Item
Symptom
Trouble Area
ECM Communication Stop Mode
Either Condition is met:
  1. "ECM (Engine)" is not displayed on the "Bus Check" screen (Click here).
  2. Communication system DTCs (DTCs that start with U) that are output correspond to "ECM Communication Stop Mode" in "DTC Combination Table" (Click here).
  1. ECM CAN main wire or connector
  2. Power source circuit of ECM
  3. ECM ground circuit
  4. ECM

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Networking.Lin Communication System.Can Communication System (For Rhd Without Central Gateway Ecu) Ecm Communication Stop Mode


Land Cruiser. Urj200, 202 Grj200 Vdj200.Networking.Lin Communication System.Can Communication System (For Rhd Without Central Gateway Ecu) Ecm Communication Stop Mode


INSPECTION PROCEDURE

NOTICE:
  1. Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key, switches or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
  2. 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).
  3. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
HINT:
  1. Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.
  2. Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.
1.CHECK FOR OPEN IN CAN BUS WIRE (ECM CAN MAIN WIRE)


  1. for 1UR-FE, 1GR-FE:



      Land Cruiser. Urj200, 202 Grj200 Vdj200.Networking.Lin Communication System.Can Communication System (For Rhd Without Central Gateway Ecu) Ecm Communication Stop Mode

    1. Disconnect the cable from the negative (-) battery terminal.

    2. Disconnect the ECM connector.

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

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      A52-10 (CANH) - A52-11 (CANL)
      		Cable disconnected from negative (-) battery terminal
      		108 to 132 Ω
      Text in Illustration
      *a
      		Front view of wire harness connector
      (to ECM)


  1. for 1VD-FTV:



      Land Cruiser. Urj200, 202 Grj200 Vdj200.Networking.Lin Communication System.Can Communication System (For Rhd Without Central Gateway Ecu) Ecm Communication Stop Mode

    1. Disconnect the cable from the negative (-) battery terminal.

    2. Disconnect the ECM connector.

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

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      A52-41 (CANH) - A52-49 (CANL)
      		Cable disconnected from negative (-) battery terminal
      		108 to 132 Ω
      Text in Illustration
      *a
      		Front view of wire harness connector
      (to ECM)


NG
REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO ECM (CANH, CANL)
OK


2.CHECK HARNESS AND CONNECTOR (ECM - BATTERY AND BODY GROUND)


  1. for 1UR-FE, 1GR-FE:



    1. Connect the cable to the negative (-) battery terminal.


      Land Cruiser. Urj200, 202 Grj200 Vdj200.Networking.Lin Communication System.Can Communication System (For Rhd Without Central Gateway Ecu) Ecm Communication Stop Mode


      Text in Illustration
      *a
      		Front view of wire harness connector
      (to ECM)
      		-
      		-
      NOTICE:
      When connecting the cable, some systems need to be initialized after the cable is reconnected (Click here).

    2. Disconnect the ECM connector.

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

      Standard Voltage:
      Tester Connection
      		Condition
      		Specified Condition
      A52-1 (BATT) - Body ground
      		Always
      		11 to 14 V
      A52-3 (+B) - Body ground
      		Battery positive (+) voltage applied to terminal A52-34 (MREL)
      		11 to 14 V
      A52-2 (+B2) - Body ground
      		Battery positive (+) voltage applied to terminal A52-34 (MREL)
      		11 to 14 V
      A52-28 (IGSW) - Body ground
      		Ignition switch ON
      		11 to 14 V

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

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      A52-31 (EC) - Body ground
      		Always
      		Below 1 Ω
      C46-42 (E02) - Body ground
      		Always
      		Below 1 Ω
      C46-43 (E01) - Body ground
      		Always
      		Below 1 Ω
      C46-82 (ME01) - Body ground
      		Always
      		Below 1 Ω
      C46-81 (E1) - Body ground
      		Always
      		Below 1 Ω
      C46-23 (E04) - Body ground
      		Always
      		Below 1 Ω
      C46-21 (E05) - Body ground
      		Always
      		Below 1 Ω


  1. for 1VD-FTV:



    1. Connect the cable to the negative (-) battery terminal.


      Land Cruiser. Urj200, 202 Grj200 Vdj200.Networking.Lin Communication System.Can Communication System (For Rhd Without Central Gateway Ecu) Ecm Communication Stop Mode


      Text in Illustration
      *a
      		Front view of wire harness connector
      (to ECM)
      		-
      		-
      NOTICE:
      When connecting the cable, some systems need to be initialized after the cable is reconnected (Click here).

    2. Disconnect the ECM connector.

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

      Standard Voltage:
      Tester Connection
      		Condition
      		Specified Condition
      A52-20 (BATT) - Body ground
      		Always
      		11 to 14 V
      A52-2 (+B) - Body ground
      		Battery positive (+) voltage applied to terminal A52-44 (MREL)
      		11 to 14 V
      A52-1 (+B2) - Body ground
      		Battery positive (+) voltage applied to terminal A52-44 (MREL)
      		11 to 14 V
      A52-28 (IGSW) - Body ground
      		Ignition switch ON
      		11 to 14 V

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

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      A52-32 (EC) - Body ground
      		Always
      		Below 1 Ω
      C46-21 (E02) - Body ground
      		Always
      		Below 1 Ω
      C46-22 (E01) - Body ground
      		Always
      		Below 1 Ω
      C46-81 (E1) - Body ground
      		Always
      		Below 1 Ω
      C46-44 (E04) - Body ground
      		Always
      		Below 1 Ω
      C46-23 (E05) - Body ground
      		Always
      		Below 1 Ω
      Result
      Result
      		Proceed to
      OK (for 1UR-FE)
      		A
      OK (for 1GR-FE)
      		B
      OK (for 1VD-FTV)
      		C
      NG
      		D


B
REPLACE ECM (Click here)

C
REPLACE ECM (Click here)

D
REPAIR OR REPLACE HARNESS OR CONNECTOR
A

REPLACE ECM (Click here)