Can Communication System (For Lhd Without Central Gateway Ecu) Air Conditioning Amplifier 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 (AIR CONDITIONING AMPLIFIER ASSEMBLY CAN BRANCH WIRE)

CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - BATTERY AND BODY GROUND)

CAN COMMUNICATION SYSTEM (for LHD without Central Gateway ECU) - Air Conditioning Amplifier Communication Stop Mode


DESCRIPTION


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

WIRING DIAGRAM


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


Land Cruiser. Urj200, 202 Grj200 Vdj200.Networking.Lin Communication System.Can Communication System (For Lhd Without Central Gateway Ecu) Air Conditioning Amplifier 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 (AIR CONDITIONING AMPLIFIER ASSEMBLY CAN BRANCH WIRE)

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



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

  1. for Automatic Air Conditioning System:

    1. Disconnect the air conditioning amplifier assembly connector.

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

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      E35-3 (CANH) - E35-4 (CANL)
      		Cable disconnected from negative (-) battery terminal
      		54 to 69 Ω
      Text in Illustration
      *a
      		Rear view of wire harness connector
      (to Air Conditioning Amplifier Assembly)


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

  1. for Manual Air Conditioning System:

    1. Disconnect the air conditioning amplifier assembly connector.

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

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      E81-11 (CANH) - E81-12 (CANL)
      		Cable disconnected from negative (-) battery terminal
      		54 to 69 Ω
      Text in Illustration
      *a
      		Rear view of wire harness connector
      (to Air Conditioning Amplifier Assembly)


NG
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO AIR CONDITIONING AMPLIFIER ASSEMBLY (CANH, CANL)
OK


2.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - BATTERY AND BODY GROUND)

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

    NOTICE:
    When connecting the cable, some systems need to be initialized after the cable is reconnected (Click here).


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

  1. for Automatic Air Conditioning System:

    1. Disconnect the air conditioning amplifier assembly connector.

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

      Standard Voltage:
      Tester Connection
      		Condition
      		Specified Condition
      E36-6 (+B1) - Body ground
      		Always
      		11 to 14 V
      E36-7 (+B2) - Body ground
      		Always
      		11 to 14 V
      E36-5 (IG+) - Body ground
      		Ignition switch ON
      		11 to 14 V

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

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      E35-6 (E1) - Body ground
      		Always
      		Below 1 Ω
      E36-1 (GND) - Body ground
      		Always
      		Below 1 Ω
      Text in Illustration
      *a
      		Rear view of wire harness connector
      (to Air Conditioning Amplifier Assembly)


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

  1. for Manual Air Conditioning System:

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

      Standard Voltage:
      Tester Connection
      		Condition
      		Specified Condition
      E81-21 (+B1) - Body ground
      		Always
      		11 to 14 V
      E81-1 (IG+) - Body ground
      		Ignition switch ON
      		11 to 14 V

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

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      E81-14 (GND) - Body ground
      		Always
      		Below 1 Ω
      Text in Illustration
      *a
      		Rear view of wire harness connector
      (to Air Conditioning Amplifier Assembly)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)