Can Communication System (For Lhd Without Central Gateway Ecu) Bus Buffer Ecu 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 (BUS BUFFER ECU CAN BRANCH WIRE)

CAN COMMUNICATION SYSTEM (for LHD without Central Gateway ECU) - Bus Buffer ECU Communication Stop Mode


DESCRIPTION


Detection Item
Symptom
Trouble Area
Bus Buffer ECU Communication Stop Mode
Either condition is met:
  1. "Accessory Gateway" is not displayed on the "Bus Check" screen (Click here)
  2. Communication system DTCs (DTCs that start with U) that are output correspond to "Bus Buffer ECU Communication Stop Mode" in "DTC Combination Table" (Click here)
Bus buffer ECU CAN branch wire or connector

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Networking.Lin Communication System.Can Communication System (For Lhd Without Central Gateway Ecu) Bus Buffer Ecu 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).
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 (BUS BUFFER ECU CAN BRANCH WIRE)


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

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

  1. Disconnect the bus buffer ECU connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E173-2 (CAN+) - E173-1 (CAN-)
    		Cable disconnected from negative (-) battery terminal
    		54 to 69 Ω
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Bus Buffer ECU)


NG
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO BUS BUFFER ECU (CAN+, CAN-)
OK

REPLACE BUS BUFFER ECU