Lin Communication System Rear Heater Control Panel Lin Communication Malfunction

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK AIR CONDITIONING TYPE

CHECK HARNESS AND CONNECTOR (A/C ECU - REAR AIR CONDITIONING CONTROL PANEL AND FRONT AIR CONDITIONING CONTROL PANEL*)

CHECK AIR CONDITIONING CONTROL PANEL (BATTERY VOLTAGE AND BODY GROUND)

CHECK REAR AIR CONDITIONING CONTROL PANEL

CHECK FRONT AIR CONDITIONING CONTROL PANEL

CHECK FRONT AIR CONDITIONING CONTROL PANEL

CHECK HARNESS AND CONNECTOR (A/C ECU - FRONT AIR CONDITIONING CONTROL PANEL)

CHECK FRONT AIR CONDITIONING CONTROL ASSEMBLY (BATTERY VOLTAGE AND BODY GROUND)

CHECK FRONT AIR CONDITIONING CONTROL ASSEMBLY

LIN COMMUNICATION SYSTEM - Rear Heater Control Panel LIN Communication Malfunction


DESCRIPTION

The LIN communication of the components related to the rear air conditioning occurs between the air conditioning amplifier (A/C ECU), rear air conditioning control panel and front air conditioning control panel.

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Networking.Lin Communication System.Lin Communication System Rear Heater Control Panel Lin Communication Malfunction


Land Cruiser. Urj200, 202 Grj200 Vdj200.Networking.Lin Communication System.Lin Communication System Rear Heater Control Panel Lin Communication Malfunction


INSPECTION PROCEDURE

NOTICE:
When using the intelligent tester with the ignition switch off to troubleshoot:
Connect the intelligent tester to the vehicle, and turn a courtesy switch on and off at 1.5 second intervals until communication between the intelligent tester and vehicle begins.
1.CHECK AIR CONDITIONING TYPE

  1. Check air conditioning type.

Result
Result
Proceed to
for 4-ZONE Type
A
except 4-ZONE Type
B


B
Go to step 7
A


2.CHECK HARNESS AND CONNECTOR (A/C ECU - REAR AIR CONDITIONING CONTROL PANEL AND FRONT AIR CONDITIONING CONTROL PANEL*)
Land Cruiser. Urj200, 202 Grj200 Vdj200.Networking.Lin Communication System.Lin Communication System Rear Heater Control Panel Lin Communication Malfunction
HINT:
*: w/o Navigation System

  1. Disconnect the E36 amplifier connector.

  1. Disconnect the F10* and E55 panel connector.

  1. Measure the resistance and voltage according to the value(s) in the tables below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E36-21 (RLIN) - E55-4 (RLIN)
    		Always
    		Below 1 Ω
    E36-20 (LIN1) - F10-5 (LIN1)*
    		Always
    		Below 1 Ω
    E36-21 (RLIN) - Body ground
    		Always
    		10 kΩ or higher
    E36-20 (LIN1) - Body ground*
    		Always
    		10 kΩ or higher
    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    E36-21 (RLIN) - Body ground
    		Always
    		Below 1 V
    E36-20 (LIN1) - Body ground*
    		Always
    		Below 1 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK AIR CONDITIONING CONTROL PANEL (BATTERY VOLTAGE AND BODY GROUND)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Networking.Lin Communication System.Lin Communication System Rear Heater Control Panel Lin Communication Malfunction

  1. Disconnect the E55 panel connector.

  1. Measure the resistance and voltage according to the value(s) in the tables below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E55-1 (E) - Body ground
    		Always
    		Below 1 Ω
    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    E55-6 (IG) - Body ground
    		Ignition switch ON
    		11 to 14 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK REAR AIR CONDITIONING CONTROL PANEL

  1. Temporarily replace the rear air conditioning control panel with a new or normally functioning one (Click here).

  1. Check that the rear air conditioning function is normal.

    OK:
    Rear air conditioning function is normal.
    Result
    Result
    		Proceed to
    OK
    		A
    NG (w/ Navigation System)
    		B
    NG (w/o Navigation System) (for LHD)
    		C
    NG (w/o Navigation System) (for RHD)
    		D


B
Go to step 5

C
REPLACE AIR CONDITIONING AMPLIFIER (Click here)

D
REPLACE AIR CONDITIONING AMPLIFIER (Click here)
A

END (REAR AIR CONDITIONING CONTROL PANEL IS DEFECTIVE)

5.CHECK FRONT AIR CONDITIONING CONTROL PANEL


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Networking.Lin Communication System.Lin Communication System Rear Heater Control Panel Lin Communication Malfunction

  1. Disconnect the F10 panel connector.

  1. Measure the resistance and voltage according to the value(s) in the tables below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    F10-1 (GND) - Body ground
    		Always
    		Below 1 Ω
    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    F10-7 (IG+) - Body ground
    		Ignition switch ON
    		11 to 14 V


NG
REPLACE FRONT AIR CONDITIONING PANEL (Click here)
OK


6.CHECK FRONT AIR CONDITIONING CONTROL PANEL

  1. Temporarily replace the front air conditioning control panel with a new or normally functioning one (Click here).

  1. Check the that front air conditioning function is normal.

    OK:
    Front air conditioning function is normal.
    Result
    Result
    		Proceed to
    OK
    		A
    NG (for LHD)
    		B
    NG (for RHD)
    		C


B
REPLACE AIR CONDITIONING AMPLIFIER (Click here)

C
REPLACE FRONT AIR CONDITIONING CONTROL ASSEMBLY (Click here)
A

END (FRONT AIR CONDITIONING CONTROL PANEL IS DEFECTIVE)

7.CHECK HARNESS AND CONNECTOR (A/C ECU - FRONT AIR CONDITIONING CONTROL PANEL)
Land Cruiser. Urj200, 202 Grj200 Vdj200.Networking.Lin Communication System.Lin Communication System Rear Heater Control Panel Lin Communication Malfunction

  1. Disconnect the E81 amplifier connector.

  1. Disconnect the F10 panel connector.

  1. Measure the resistance and voltage according to the value(s) in the tables below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E81-37 (LIN1) - F10-5 (LIN1)
    		Always
    		Below 1 Ω
    E81-37 (LIN1) - Body ground
    		Always
    		10 kΩ or higher
    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    E81-37 (LIN1) - Body ground
    		Always
    		Below 1 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


8.CHECK FRONT AIR CONDITIONING CONTROL ASSEMBLY (BATTERY VOLTAGE AND BODY GROUND)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Networking.Lin Communication System.Lin Communication System Rear Heater Control Panel Lin Communication Malfunction

  1. Disconnect the F10 panel connector.

  1. Measure the resistance and voltage according to the value(s) in the tables below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    F10-1 (GND) - Body ground
    		Always
    		Below 1 Ω
    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    F10-7 (IG+) - Body ground
    		Ignition switch ON
    		11 to 14 V


NG
REPLACE FRONT AIR CONDITIONING CONTROL ASSEMBLY (Click here)
OK


9.CHECK FRONT AIR CONDITIONING CONTROL ASSEMBLY

  1. Temporarily replace the front air conditioning control panel with a new or normally functioning one (Click here).
    Check the that front air conditioning function is normal.

    OK:
    Front air conditioning function is normal.
    Result
    Result
    		Proceed to
    OK
    		A
    NG (for LHD)
    		B
    NG (for RHD)
    		C


B
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)

C
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)
A

END (FRONT AIR CONDITIONING CONTROL PANEL IS DEFECTIVE)