Can Communication System (For Lhd With Central Gateway Ecu) Check Bus 3 Line For Short To Gnd

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FOR SHORT TO GND IN CAN BUS WIRE (CENTRAL GATEWAY ECU - NO. 5 CAN JUNCTION CONNECTOR)

CONNECT CONNECTOR

CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 CAN JUNCTION TERMINAL - NO. 6 CAN JUNCTION CONNECTOR)

CONNECT CONNECTOR

CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 5 CAN JUNCTION CONNECTOR)

CONNECT CONNECTOR

CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 6 CAN JUNCTION CONNECTOR)

CHECK FOR SHORT TO GND IN CAN BUS WIRE (ECU, SENSOR)

CAN COMMUNICATION SYSTEM (for LHD with Central Gateway ECU) - Check Bus 3 Line for Short to GND


DESCRIPTION

There may be a short circuit between one of the CAN bus wires and GND when no resistance exists between terminal 6 (CA3H) of the central gateway ECU and terminal 4 (CG) of the DLC3, or terminal 21 (CA3L) of the central gateway ECU and terminal 4 (CG) of the DLC3.

Detection Item
Trouble Area
No resistance exists between terminal 6 (CA3H) of the central gateway ECU and terminal 4 (CG) of the DLC3, or terminal 21 (CA3L) of the central gateway ECU and terminal 4 (CG) of the DLC3.
  1. Short to GND in bus 3 CAN main wires
  2. Short to GND in bus 3 CAN branch wires
  3. Central gateway ECU
  4. Multi-media module receiver assembly*1
  5. Bus buffer ECU*2
  6. Radio and display receiver assembly*3
  7. No. 5 CAN junction connector
  8. No. 6 CAN junction connector
  9. No. 2 CAN junction terminal
  1. *1: for Multi-media Module Receiver Type
  2. *2: w/ Bus Buffer ECU
  3. *3: for Radio and Display Type

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Networking.Lin Communication System.Can Communication System (For Lhd With Central Gateway Ecu) Check Bus 3 Line For Short To Gnd


INSPECTION PROCEDURE

NOTICE:
  1. Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output (Click here).
  2. 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.
  3. 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).
  4. After the repair, perform CAN Bus Check and check that all the ECUs and sensors connected to the CAN communication system are displayed (Click here).
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 SHORT TO GND IN CAN BUS WIRE (CENTRAL GATEWAY ECU - NO. 5 CAN JUNCTION CONNECTOR)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Networking.Lin Communication System.Can Communication System (For Lhd With Central Gateway Ecu) Check Bus 3 Line For Short To Gnd

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

  1. Disconnect the central gateway ECU connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E145-6 (CA3H) - E22-4 (CG)
    		Cable disconnected from negative (-) battery terminal
    		200 Ω or higher
    E145-21 (CA3L) - E22-4 (CG)
    		Cable disconnected from negative (-) battery terminal
    		200 Ω or higher
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Central Gateway ECU)
    *b
    		Front view of DLC3


NG
Go to step 2
OK

REPLACE CENTRAL GATEWAY ECU (Click here)

2.CONNECT CONNECTOR

  1. Reconnect the E145 central gateway ECU connector.


NEXT


3.CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 CAN JUNCTION TERMINAL - NO. 6 CAN JUNCTION CONNECTOR)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Networking.Lin Communication System.Can Communication System (For Lhd With Central Gateway Ecu) Check Bus 3 Line For Short To Gnd

  1. Disconnect the No. 2 CAN junction terminal connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    F98-3 (CANH) - E22-4 (CG)
    		Cable disconnected from negative (-) battery terminal
    		200 Ω or higher
    F98-2 (CANL) - E22-4 (CG)
    		Cable disconnected from negative (-) battery terminal
    		200 Ω or higher
    Text in Illustration
    *a
    		Rear view of wire harness connector
    (to No. 2 CAN Junction Terminal)
    *b
    		Front view of DLC3


NG
Go to step 4
OK

REPLACE NO. 2 CAN JUNCTION TERMINAL

4.CONNECT CONNECTOR

  1. Reconnect the F98 No. 2 CAN junction terminal connector.


NEXT


5.CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 5 CAN JUNCTION CONNECTOR)


  1. Disconnect the No. 5 CAN junction connector.


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Networking.Lin Communication System.Can Communication System (For Lhd With Central Gateway Ecu) Check Bus 3 Line For Short To Gnd


    Text in Illustration
    *a
    		Rear view of wire harness connector
    (to No. 5 CAN Junction Connector)
    		*b
    		Front view of DLC3
    *c
    		to Central Gateway ECU
    		*d
    		to Bus Buffer ECU (w/ Bus Buffer ECU)
    *e
    1. to Multi-media Module Receiver Assembly (for Multi-media Module Receiver Type)
    2. to Radio and Display Receiver Assembly (for Radio and Display Type)
    		*f
    		to No. 6 CAN Junction Connector

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    		Connect to
    E152-8 (CANH) - E22-4 (CG)
    		Cable disconnected from negative (-) battery terminal
    		200 Ω or higher
    		Central gateway ECU
    E152-19 (CANL) - E22-4 (CG)
    		Cable disconnected from negative (-) battery terminal
    		200 Ω or higher
    E152-9 (CANH) - E22-4 (CG)
    		Cable disconnected from negative (-) battery terminal
    		200 Ω or higher
    		Bus buffer ECU*1
    E152-20 (CANL) - E22-4 (CG)
    		Cable disconnected from negative (-) battery terminal
    		200 Ω or higher
    E152-10 (CANH) - E22-4 (CG)
    		Cable disconnected from negative (-) battery terminal
    		200 Ω or higher
    1. Multi-media module receiver assembly*2
    2. Radio and display receiver assembly*3
    E152-21 (CANL) - E22-4 (CG)
    		Cable disconnected from negative (-) battery terminal
    		200 Ω or higher
    E152-11 (CANH) - E22-4 (CG)
    		Cable disconnected from negative (-) battery terminal
    		200 Ω or higher
    		No. 6 CAN junction connector
    E152-22 (CANL) - E22-4 (CG)
    		Cable disconnected from negative (-) battery terminal
    		200 Ω or higher
    1. *1: w/ Bus Buffer ECU
    2. *2: for Multi-media Module Receiver Type
    3. *3: for Radio and Display Type
    Result
    Result
    		Proceed to
    OK
    		A
    NG (Central gateway ECU CAN main wire)
    		B
    NG (No. 6 CAN junction connector CAN main wire)
    		C
    NG (ECU or sensor CAN branch wires)
    		D


B
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU)

C
Go to step 6

D
Go to step 8
A

REPLACE NO. 5 CAN JUNCTION CONNECTOR

6.CONNECT CONNECTOR

  1. Reconnect the E152 No. 5 CAN junction connector.


NEXT


7.CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 6 CAN JUNCTION CONNECTOR)


  1. Disconnect the No. 6 CAN junction connector.


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Networking.Lin Communication System.Can Communication System (For Lhd With Central Gateway Ecu) Check Bus 3 Line For Short To Gnd


    Text in Illustration
    *a
    		Rear view of wire harness connector
    (to No. 6 CAN Junction Connector)
    		*b
    		Front view of DLC3
    *c
    		to No. 5 CAN Junction Connector
    		*d
    		to No. 2 CAN Junction Terminal

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    		Connect to
    F99-6 (CANH) - E22-4 (CG)
    		Cable disconnected from negative (-) battery terminal
    		200 Ω or higher
    		No. 5 CAN junction connector
    F99-17 (CANL) - E22-4 (CG)
    		Cable disconnected from negative (-) battery terminal
    		200 Ω or higher
    F99-7 (CANH) - E22-4 (CG)
    		Cable disconnected from negative (-) battery terminal
    		200 Ω or higher
    		No. 2 CAN junction terminal
    F99-18 (CANL) - E22-4 (CG)
    		Cable disconnected from negative (-) battery terminal
    		200 Ω or higher
    Result
    Result
    		Proceed to
    OK
    		A
    NG (No. 5 CAN junction connector CAN main wire)
    		B
    NG (No. 2 CAN junction terminal CAN main wire)
    		C


B
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 6 CAN JUNCTION CONNECTOR - NO. 5 CAN JUNCTION CONNECTOR)

C
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 6 CAN JUNCTION CONNECTOR - NO. 2 CAN JUNCTION TERMINAL)
A

REPLACE NO. 6 CAN JUNCTION CONNECTOR

8.CHECK FOR SHORT TO GND IN CAN BUS WIRE (ECU, SENSOR)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Networking.Lin Communication System.Can Communication System (For Lhd With Central Gateway Ecu) Check Bus 3 Line For Short To Gnd

  1. Reconnect the CAN junction connector.

  1. Disconnect the connector that includes terminals CANH and CANL from the ECU or sensor to which the bus line shorted to GND is connected.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E145-6 (CA3H) - E22-4 (CG)
    		Cable disconnected from negative (-) battery terminal
    		200 Ω or higher
    E145-21 (CA3L) - E22-4 (CG)
    		Cable disconnected from negative (-) battery terminal
    		200 Ω or higher
    Text in Illustration
    *a
    		Component with harness connected
    (Central Gateway ECU)
    *b
    		Front view of DLC3
    HINT:
    If the resistance changes to 200 Ω or higher when the connector is disconnected from the ECU or sensor, there may be a short in the ECU or sensor.


NG
REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR CAN BRANCH WIRES OR CONNECTOR
OK

REPLACE CORRESPONDING ECU OR SENSOR