Can Communication System (For Rhd With Entry And Start System) Check Sub Bus Wire Harness


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

CHECK CAN BUS WIRE (CHECK CAN MAIN WIRE FOR DISCONNECTION, CHECK BUS LINE FOR SHORT)

CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 7 JUNCTION CONNECTOR - UREA PUMP CONTROL ECU)

CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 7 JUNCTION CONNECTOR - ECM)

CONNECT CONNECTOR

CHECK FOR OPEN IN CAN BUS MAIN WIRE (UREA PUMP CONTROL ECU - NO. 7 JUNCTION CONNECTOR)

CONNECT CONNECTOR

CHECK FOR OPEN IN CAN BUS MAIN WIRE (ECM - NO. 7 JUNCTION CONNECTOR)

CHECK FOR SHORT IN CAN BUS WIRES (NO. 7 JUNCTION CONNECTOR - NITROGEN OXIDES SENSOR)

CHECK FOR SHORT IN CAN BUS WIRES (NO. 7 JUNCTION CONNECTOR - UREA PUMP CONTROL ECU)

CHECK FOR SHORT IN CAN BUS WIRES (NO. 7 JUNCTION CONNECTOR - ECM)

CONNECT CONNECTOR

CHECK FOR SHORT IN CAN BUS WIRES (NITROGEN OXIDES SENSOR)

CONNECT CONNECTOR

CHECK FOR SHORT IN CAN BUS WIRES (UREA PUMP CONTROL ECU)

CONNECT CONNECTOR

CHECK FOR SHORT IN CAN BUS WIRES (ECM)

CHECK HARNESS AND CONNECTOR (ECM - BATTERY AND GROUND)

CAN COMMUNICATION SYSTEM (for RHD with Entry and Start System) - Check Sub Bus Wire Harness


DESCRIPTION


Symptom
Trouble Area
All DTCs related to the sub bus are output from the ECM.
  1. Local bus circuit
  2. ECM
  3. Urea pump control ECU
  4. Nitrogen oxides sensor
  5. No. 7 junction connector

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Networking.Lin Communication System.Can Communication System (For Rhd With Entry And Start System) Check Sub Bus Wire Harness


INSPECTION PROCEDURE

HINT:
Operating the engine switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.
1.DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

  1. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the CAN main wire and the CAN branch wire.

    CAUTION:
    Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the airbag system.
    NOTICE:
    1. After turning the engine 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 (LandCruiser RM000003YMD00TX.html).
    2. When disconnecting the cable, some systems need to be initialized after the cable is reconnected (LandCruiser RM000003YMF011X.html).

NEXT


2.CHECK CAN BUS WIRE (CHECK CAN MAIN WIRE FOR DISCONNECTION, CHECK BUS LINE FOR SHORT)


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


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Networking.Lin Communication System.Can Communication System (For Rhd With Entry And Start System) Check Sub Bus Wire Harness


    Text in Illustration
    *a
    		Component with harness connected
    (ECM)
    		-
    		-
    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    		Resistance: Malfunction
    G184-27 (CANU) - G184-35 (CAND)
    		Engine switch off
    		54 to 69 Ω
    		Below 53 Ω: Short in line
    G184-27 (CANU) - G184-35 (CAND)
    		Engine switch off
    		54 to 69 Ω
    		Higher than 70 Ω: Open in CAN main bus line
    G184-27 (CANU) - G185-1 (BATT)
    		Engine switch off
    		6 kΩ or higher
    		Below 6 kΩ: +B short
    G184-35 (CAND) - G185-1 (BATT)
    		Engine switch off
    		6 kΩ or higher
    		Below 6 kΩ: +B short
    G184-27 (CANU) - C152-1 (E1)
    		Engine switch off
    		200 Ω or higher
    		Below 200 Ω: Ground short
    G184-35 (CAND) - C152-1 (E1)
    		Engine switch off
    		200 Ω or higher
    		Below 200 Ω: Ground short
    Result
    Result
    		Proceed to
    NG
    1. Open in CAN main bus line
    		A
    NG
    1. Short in line
    2. +B short
    3. Ground short
    		B
    OK
    		C


B
Go to step 9

C
Go to step 18
A


3.CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 7 JUNCTION CONNECTOR - UREA PUMP CONTROL ECU)
Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Networking.Lin Communication System.Can Communication System (For Rhd With Entry And Start System) Check Sub Bus Wire Harness

  1. Disconnect the No. 7 junction connector.

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    Q41-4 (CANH) - Q41-15 (CANL)
    		Engine switch off
    		108 to 132 Ω
    Text in Illustration
    *a
    		Rear view of wire harness connector
    (to No. 7 Junction Connector)


NG
Go to step 5
OK


4.CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 7 JUNCTION CONNECTOR - ECM)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Networking.Lin Communication System.Can Communication System (For Rhd With Entry And Start System) Check Sub Bus Wire Harness

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    Q41-5 (CANH) - Q41-16 (CANL)
    		Engine switch off
    		108 to 132 Ω
    Text in Illustration
    *a
    		Rear view of wire harness connector
    (to No. 7 Junction Connector)


NG
Go to step 7
OK

REPLACE NO. 7 JUNCTION CONNECTOR

5.CONNECT CONNECTOR

  1. Reconnect the Q41 No. 7 junction connector.


NEXT


6.CHECK FOR OPEN IN CAN BUS MAIN WIRE (UREA PUMP CONTROL ECU - NO. 7 JUNCTION CONNECTOR)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Networking.Lin Communication System.Can Communication System (For Rhd With Entry And Start System) Check Sub Bus Wire Harness

  1. Disconnect the urea pump control ECU connector.

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    s4-27 (CAN+) - s4-26 (CAN-)
    		Engine switch off
    		108 to 132 Ω
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Urea Pump Control ECU)


NG
REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO UREA PUMP CONTROL ECU (UREA PUMP CONTROL ECU - NO. 7 JUNCTION CONNECTOR)
OK

REPLACE UREA PUMP CONTROL ECU (LandCruiser RM000005UL6000X.html)

7.CONNECT CONNECTOR

  1. Reconnect the Q41 No. 7 junction connector.


NEXT


8.CHECK FOR OPEN IN CAN BUS MAIN WIRE (ECM - NO. 7 JUNCTION CONNECTOR)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Networking.Lin Communication System.Can Communication System (For Rhd With Entry And Start System) Check Sub Bus Wire Harness

  1. Disconnect the ECM connector.

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    G184-27 (CANU) - G184-35 (CAND)
    		Engine switch off
    		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 (ECM - NO. 7 JUNCTION CONNECTOR)
OK

REPLACE ECM (LandCruiser RM0000013Z002DX.html)

9.CHECK FOR SHORT IN CAN BUS WIRES (NO. 7 JUNCTION CONNECTOR - NITROGEN OXIDES SENSOR)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Networking.Lin Communication System.Can Communication System (For Rhd With Entry And Start System) Check Sub Bus Wire Harness

  1. Disconnect the No. 7 junction connector.

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    Q41-6 (CANH) - Q41-17 (CANL)
    		Engine switch off
    		200 Ω or higher
    Q41-6 (CANH) - G48-4 (CG)
    		Engine switch off
    		200 Ω or higher
    Q41-17 (CANL) - G48-4 (CG)
    		Engine switch off
    		200 Ω or higher
    Q41-6 (CANH) - G48-16 (BAT)
    		Engine switch off
    		6 kΩ or higher
    Q41-17 (CANL) - G48-16 (BAT)
    		Engine switch off
    		6 kΩ or higher
    Text in Illustration
    *a
    		Rear view of wire harness connector
    (to No. 7 Junction Connector)
    *b
    		Front view of DLC3


NG
Go to step 12
OK


10.CHECK FOR SHORT IN CAN BUS WIRES (NO. 7 JUNCTION CONNECTOR - UREA PUMP CONTROL ECU)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Networking.Lin Communication System.Can Communication System (For Rhd With Entry And Start System) Check Sub Bus Wire Harness

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    Q41-4 (CANH) - Q41-15 (CANL)
    		Engine switch off
    		108 to 132 Ω
    Q41-4 (CANH) - G48-4 (CG)
    		Engine switch off
    		200 Ω or higher
    Q41-15 (CANL) - G48-4 (CG)
    		Engine switch off
    		200 Ω or higher
    Q41-4 (CANH) - G48-16 (BAT)
    		Engine switch off
    		6 kΩ or higher
    Q41-15 (CANL) - G48-16 (BAT)
    		Engine switch off
    		6 kΩ or higher
    Text in Illustration
    *a
    		Rear view of wire harness connector
    (to No. 7 Junction Connector)
    *b
    		Front view of DLC3


NG
Go to step 14
OK


11.CHECK FOR SHORT IN CAN BUS WIRES (NO. 7 JUNCTION CONNECTOR - ECM)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Networking.Lin Communication System.Can Communication System (For Rhd With Entry And Start System) Check Sub Bus Wire Harness

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    Q41-5 (CANH) - Q41-16 (CANL)
    		Engine switch off
    		108 to 132 Ω
    Q41-5 (CANH) - G48-4 (CG)
    		Engine switch off
    		200 Ω or higher
    Q41-16 (CANL) - G48-4 (CG)
    		Engine switch off
    		200 Ω or higher
    Q41-5 (CANH) - G48-16 (BAT)
    		Engine switch off
    		6 kΩ or higher
    Q41-16 (CANL) - G48-16 (BAT)
    		Engine switch off
    		6 kΩ or higher
    Text in Illustration
    *a
    		Rear view of wire harness connector
    (to No. 7 Junction Connector)
    *b
    		Front view of DLC3


NG
Go to step 16
OK

REPLACE NO. 7 JUNCTION CONNECTOR

12.CONNECT CONNECTOR

  1. Reconnect the Q41 No. 7 junction connector.


NEXT


13.CHECK FOR SHORT IN CAN BUS WIRES (NITROGEN OXIDES SENSOR)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Networking.Lin Communication System.Can Communication System (For Rhd With Entry And Start System) Check Sub Bus Wire Harness

  1. Disconnect the nitrogen oxides sensor connector.

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    s6-4 (CAN+) - s6-3 (CAN-)
    		Engine switch off
    		54 to 69 Ω
    s6-4 (CAN+) - G48-4 (CG)
    		Engine switch off
    		200 Ω or higher
    s6-3 (CAN-) - G48-4 (CG)
    		Engine switch off
    		200 Ω or higher
    s6-4 (CAN+) - G48-16 (BAT)
    		Engine switch off
    		6 kΩ or higher
    s6-3 (CAN-) - G48-16 (BAT)
    		Engine switch off
    		6 kΩ or higher
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Nitrogen Oxides Sensor)
    *b
    		Front view of DLC3


NG
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO NITROGEN OXIDES SENSOR (CAN+, CAN-)
OK

REPLACE NITROGEN OXIDES SENSOR (LandCruiser RM000004KGB00NX.html)

14.CONNECT CONNECTOR

  1. Reconnect the Q41 No. 7 junction connector.


NEXT


15.CHECK FOR SHORT IN CAN BUS WIRES (UREA PUMP CONTROL ECU)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Networking.Lin Communication System.Can Communication System (For Rhd With Entry And Start System) Check Sub Bus Wire Harness

  1. Disconnect the urea pump control ECU connector.

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    s4-27 (CAN+) - s4-26 (CAN-)
    		Engine switch off
    		108 to 132 Ω
    s4-27 (CAN+) - G48-4 (CG)
    		Engine switch off
    		200 Ω or higher
    s4-26 (CAN-) - G48-4 (CG)
    		Engine switch off
    		200 Ω or higher
    s4-27 (CAN+) - G48-16 (BAT)
    		Engine switch off
    		6 kΩ or higher
    s4-26 (CAN-) - G48-16 (BAT)
    		Engine switch off
    		6 kΩ or higher
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Urea Pump Control ECU)
    *b
    		Front view of DLC3


NG
REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO UREA PUMP CONTROL ECU (CAN+, CAN-)
OK

REPLACE UREA PUMP CONTROL ECU (LandCruiser RM000005UL6000X.html)

16.CONNECT CONNECTOR

  1. Reconnect the Q41 No. 7 junction connector.


NEXT


17.CHECK FOR SHORT IN CAN BUS WIRES (ECM)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Networking.Lin Communication System.Can Communication System (For Rhd With Entry And Start System) Check Sub Bus Wire Harness

  1. Disconnect the ECM connector.

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    G184-27 (CANU) - G184-35 (CAND)
    		Engine switch off
    		108 to 132 Ω
    G184-27 (CANU) - G48-4 (CG)
    		Engine switch off
    		200 Ω or higher
    G184-35 (CAND) - G48-4 (CG)
    		Engine switch off
    		200 Ω or higher
    G184-27 (CANU) - G48-16 (BAT)
    		Engine switch off
    		6 kΩ or higher
    G184-35 (CAND) - G48-16 (BAT)
    		Engine switch off
    		6 kΩ or higher
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to ECM)
    *b
    		Front view of DLC3


NG
REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO ECM (CANU, CAND)
OK

REPLACE ECM (LandCruiser RM0000013Z002DX.html)

18.CHECK HARNESS AND CONNECTOR (ECM - BATTERY AND GROUND)


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


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Networking.Lin Communication System.Can Communication System (For Rhd With Entry And Start System) Check Sub Bus Wire Harness


    Text in Illustration
    *a
    		Front view of wire harness connector
    (to ECM)
    		-
    		-
    NOTICE:
    When disconnecting the cable, some systems need to be initialized after the cable is reconnected (LandCruiser RM000003YMF011X.html).

  1. Disconnect the ECM connectors.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    C152-1 (E1) - Body ground
    		Always
    		Below 1 Ω
    C151-3 (E01) - Body ground
    		Always
    		Below 1 Ω
    C152-4 (E02) - Body ground
    		Always
    		Below 1 Ω
    C152-3 (ME01) - Body ground
    		Always
    		Below 1 Ω
    G185-8 (EC) - Body ground
    		Always
    		Below 1 Ω

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    G185-1 (BATT) - Body ground
    		Always
    		11 to 14 V
    G185-2 (+B) - Body ground
    		Battery positive (+) voltage applied to terminal G184-14 (MREL)
    		11 to 14 V
    G185-3 (+B2) - Body ground
    		Battery positive (+) voltage applied to terminal G184-14 (MREL)
    		11 to 14 V
    G185-4 (+B3) - Body ground
    		Battery positive (+) voltage applied to terminal G184-14 (MREL)
    		11 to 14 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM (LandCruiser RM0000013Z002DX.html)