Dtc U1002 Lost Communication With Gateway Module

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 WIRE (NO. 3 JUNCTION CONNECTOR - NETWORK GATEWAY ECU)

CHECK FOR OPEN IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - NO. 7 JUNCTION CONNECTOR)

CONNECT CONNECTOR

CHECK FOR OPEN IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - NETWORK GATEWAY ECU)

CHECK FOR OPEN IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR)

CONNECT CONNECTOR

CHECK FOR OPEN IN CAN BUS WIRE (NETWORK GATEWAY ECU)

CONNECT CONNECTOR

CHECK FOR OPEN IN CAN BUS WIRE (NO. 5 JUNCTION CONNECTOR - NO. 7 JUNCTION CONNECTOR)

CHECK FOR OPEN IN CAN BUS WIRE (NO. 5 JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR)

CONNECT CONNECTOR

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

CHECK FOR SHORT IN CAN BUS WIRES (NO. 5 JUNCTION CONNECTOR SIDE)

CHECK FOR SHORT IN CAN BUS WIRES (NO. 5 JUNCTION CONNECTOR - HEADLIGHT SWIVEL ECU ASSEMBLY)

CHECK FOR SHORT IN CAN BUS WIRES (NO. 5 JUNCTION CONNECTOR - NO. 7 JUNCTION CONNECTOR)

CONNECT CONNECTOR

CHECK FOR SHORT IN CAN BUS WIRES (HEADLIGHT SWIVEL ECU ASSEMBLY)

CONNECT CONNECTOR

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

CONNECT CONNECTOR

CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 JUNCTION CONNECTOR - NO. 5 JUNCTION CONNECTOR)

CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 JUNCTION CONNECTOR SIDE)

CONNECT CONNECTOR

CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR)

CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - CLEARANCE WARNING ECU ASSEMBLY)

CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - NETWORK GATEWAY ECU)

CONNECT CONNECTOR

CHECK FOR SHORT IN CAN BUS WIRES (CLEARANCE WARNING ECU ASSEMBLY)

CONNECT CONNECTOR

CHECK FOR SHORT IN CAN BUS WIRES (NETWORK GATEWAY ECU)

CHECK HARNESS AND CONNECTOR (NETWORK GATEWAY ECU - BATTERY AND BODY GROUND)

DTC U1002 Lost Communication with Gateway Module

DESCRIPTION

1. The network gateway ECU stores this DTC when no signals can be received from the ECUs that have been memorized as those connected to the CAN V2 bus.
   
2. When the network gateway ECU receives a response signal from the ECUs connected to the CAN V2 bus, the network gateway ECU recognizes and memorizes that the ECU is connected to the CAN V2 bus. Based on this memorized data, the network gateway ECU monitors for malfunctions in the ECUs connected to the CAN V2 bus when communicating with those ECUs. If the network gateway ECU cannot receive response signals from the ECUs that have been memorized as those connected to the CAN V2 bus, the network gateway ECU determines that a malfunction exists.
   
3. If 2 or more DTCs are output during the DTC check, one side of the CAN branch wire may be open (one side of the CANH [CAN branch wire]/CANL [CAN branch wire] of the ECU and/or sensor is open).
   

DTC Code	DTC Detection Condition	Trouble Area
U1002	Lost communication with the gateway module.	V2 bus circuit Network gateway ECU CAN main wire or connector Clearance warning ECU assembly CAN branch wire or connector*1 Headlight swivel ECU assembly CAN branch wire or connector*2 Network gateway ECU Clearance warning ECU assembly*1 Headlight swivel ECU assembly*2 No. 1 junction connector No. 3 junction connector No. 5 junction connector No. 7 junction connector

1. For vehicles with a network gateway ECU.
   
2. *1: w/ TOYOTA Parking Assist-sensor System (for 4 Sensor Type)
   
3. *2: for LED Headlight
   

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:

Operating the ignition 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 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 (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.
   

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition	Resistance: Malfunction
   G155-13 (CA2H) - G155-12 (CA2L)	Ignition switch off	54 to 69 Ω	Below 53 Ω: Short in line
   G155-13 (CA2H) - G155-12 (CA2L)	Ignition switch off	54 to 69 Ω	Higher than 70 Ω: Open in CAN main bus line
   G155-13 (CA2H) - G155-2 (BATT)	Ignition switch off	6 kΩ or higher	Below 6 kΩ: +B short
   G155-12 (CA2L) - G155-2 (BATT)	Ignition switch off	6 kΩ or higher	Below 6 kΩ: +B short
   G155-13 (CA2H) - G155-4 (GND)	Ignition switch off	200 Ω or higher	Below 200 Ω: Ground short
   G155-12 (CA2L) - G155-4 (GND)	Ignition switch off	200 Ω or higher	Below 200 Ω: Ground short

   Text in Illustration

   *a	Component with harness connected (Network Gateway ECU)

   Result

   Result	Proceed to
   NG Open in CAN main bus line	A
   NG Short in line +B short GND short	B
   OK	C

B	Go to step 15
C	Go to step 33

A

3.CHECK FOR OPEN IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - NETWORK GATEWAY ECU)

1. Disconnect the G95 No. 3 junction connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   G95-1 (CANH) - G95-12 (CANL)	Ignition switch off	108 to 132 Ω

   Text in Illustration

   *a	Rear view of wire harness connector (to No. 3 Junction Connector)

NG	Go to step 5

OK

4.CHECK FOR OPEN IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - 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
   G95-3 (CANH) - G95-14 (CANL)	Ignition switch off	108 to 132 Ω

   Text in Illustration

   *a	Rear view of wire harness connector (to No. 3 Junction Connector)

NG	Go to step 10

OK
REPLACE NO. 3 JUNCTION CONNECTOR

5.CONNECT CONNECTOR

1. Reconnect the G95 No. 3 junction connector.
   

NEXT

6.CHECK FOR OPEN IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - NETWORK GATEWAY ECU)

1. Disconnect the G98 No. 1 junction connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   G98-1 (CANH) - G98-12 (CANL)	Ignition switch off	108 to 132 Ω

   Text in Illustration

   *a	Rear view of wire harness connector (to No. 1 Junction Connector)

NG	Go to step 8

OK

7.CHECK FOR OPEN IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR)

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   G98-3 (CANH) - G98-14 (CANL)	Ignition switch off	108 to 132 Ω

   Text in Illustration

   *a	Rear view of wire harness connector (to No. 1 Junction Connector)

NG	REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 1 JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR)

OK
REPLACE NO. 1 JUNCTION CONNECTOR

8.CONNECT CONNECTOR

1. Reconnect the G98 No. 1 junction connector.
   

NEXT

9.CHECK FOR OPEN IN CAN BUS WIRE (NETWORK GATEWAY ECU)

1. Disconnect the G155 network gateway ECU connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   G155-13 (CA2H) - G155- 12 (CA2L)	Ignition switch off	108 to 132 Ω

   Text in Illustration

   *a	Rear view of wire harness connector (to Network Gateway ECU)

NG	REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO NETWORK GATEWAY ECU (NETWORK GATEWAY ECU - NO. 1 JUNCTION CONNECTOR)

OK
REPLACE NETWORK GATEWAY ECU (LandCruiser RM0000039R5027X.html)

10.CONNECT CONNECTOR

1. Reconnect the G95 No. 3 junction connector.
   

NEXT

11.CHECK FOR OPEN IN CAN BUS WIRE (NO. 5 JUNCTION CONNECTOR - NO. 7 JUNCTION CONNECTOR)

1. Disconnect the A73 No. 5 junction connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   A73-1 (CANH) - A73-12 (CANL)	Ignition switch off	108 to 132 Ω

   Text in Illustration

   *a	Rear view of wire harness connector (to No. 5 Junction Connector)

NG	Go to step 13

OK

12.CHECK FOR OPEN IN CAN BUS WIRE (NO. 5 JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR)

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   A73-2 (CANH) - A73-13 (CANL)	Ignition switch off	108 to 132 Ω

   Text in Illustration

   *a	Rear view of wire harness connector (to No. 5 Junction Connector)

NG	REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 5 JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR)

OK
REPLACE NO. 5 JUNCTION CONNECTOR

13.CONNECT CONNECTOR

1. Reconnect the A73 No. 5 junction connector.
   

NEXT

14.CHECK FOR OPEN IN CAN BUS WIRE (NO. 7 JUNCTION CONNECTOR)

1. Disconnect the G102 No. 7 junction connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   G102-3 (CANH) - G102-2 (CANL)	Ignition switch off	108 to 132 Ω

   Text in Illustration

   *a	Rear view of wire harness connector (to No. 7 Junction Connector)

NG	REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 7 JUNCTION CONNECTOR - NO. 5 JUNCTION CONNECTOR)

OK
REPLACE NO. 7 JUNCTION CONNECTOR

15.CHECK FOR SHORT IN CAN BUS WIRES (NO. 5 JUNCTION CONNECTOR SIDE)

1. Disconnect the A73 No. 5 junction connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   G155-13 (CA2H) - G155-12 (CA2L)	Ignition switch off	108 to 132 Ω
   G155-13 (CA2H) - G155-4 (GND)	Ignition switch off	200 Ω or higher
   G155-12 (CA2L) - G155-4 (GND)	Ignition switch off	200 Ω or higher
   G155-13 (CA2H) - G155-2 (BATT)	Ignition switch off	6 kΩ or higher
   G155-12 (CA2L) - G155-2 (BATT)	Ignition switch off	6 kΩ or higher

   Text in Illustration

   *a	Component with harness connected (Network Gateway ECU)

NG	Go to step 22

OK

16.CHECK FOR SHORT IN CAN BUS WIRES (NO. 5 JUNCTION CONNECTOR - HEADLIGHT SWIVEL ECU ASSEMBLY)

NOTICE:

For vehicles with a halogen headlight, go to "Check for Short in CAN Bus Wires (No. 5 Junction Connector - 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
   A73-4 (CANH) - A73-15 (CANL)	Ignition switch off	200 Ω or higher
   A73-4 (CANH) - G48-4 (CG)	Ignition switch off	200 Ω or higher
   A73-15 (CANL) - G48-4 (CG)	Ignition switch off	200 Ω or higher
   A73-4 (CANH) - G48-16 (BAT)	Ignition switch off	6 kΩ or higher
   A73-15 (CANL) - G48-16 (BAT)	Ignition switch off	6 kΩ or higher

   Text in Illustration

   *a	Rear view of wire harness connector (to No. 5 Junction Connector)
   *b	Front view of DLC3

NG	Go to step 18

OK

17.CHECK FOR SHORT IN CAN BUS WIRES (NO. 5 JUNCTION CONNECTOR - 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
   A73-1 (CANH) - A73-12 (CANL)	Ignition switch off	108 to 132 Ω
   A73-1 (CANH) - G48-4 (CG)	Ignition switch off	200 Ω or higher
   A73-12 (CANL) - G48-4 (CG)	Ignition switch off	200 Ω or higher
   A73-1 (CANH) - G48-16 (BAT)	Ignition switch off	6 kΩ or higher
   A73-12 (CANL) - G48-16 (BAT)	Ignition switch off	6 kΩ or higher

   Text in Illustration

   *a	Rear view of wire harness connector (to No. 5 Junction Connector)
   *b	Front view of DLC3

NG	Go to step 20

OK
REPLACE NO. 5 JUNCTION CONNECTOR

18.CONNECT CONNECTOR

1. Reconnect the A73 No. 5 junction connector.
   

NEXT

19.CHECK FOR SHORT IN CAN BUS WIRES (HEADLIGHT SWIVEL ECU ASSEMBLY)

1. Disconnect the A58 headlight swivel ECU assembly connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   A58-12 (CANH) - A58-13 (CANL)	Ignition switch off	54 to 69 Ω
   A58-12 (CANH) - G48-4 (CG)	Ignition switch off	200 Ω or higher
   A58-13 (CANL) - G48-4 (CG)	Ignition switch off	200 Ω or higher
   A58-12 (CANH) - G48-16 (BAT)	Ignition switch off	6 kΩ or higher
   A58-13 (CANL) - G48-16 (BAT)	Ignition switch off	6 kΩ or higher

   Text in Illustration

   *a	Front view of wire harness connector (to Headlight Swivel ECU Assembly)
   *b	Front view of DLC3

NG	REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO HEADLIGHT SWIVEL ECU ASSEMBLY (CANH, CANL)

OK
REPLACE HEADLIGHT SWIVEL ECU ASSEMBLY (LandCruiser RM0000038VH021X.html)

20.CONNECT CONNECTOR

1. Reconnect the A73 No. 5 junction connector.
   

NEXT

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

1. Disconnect the G102 No. 7 junction connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   G102-3 (CANH) - G102-2 (CANL)	Ignition switch off	108 to 132 Ω
   G102-3 (CANH) - G48-4 (CG)	Ignition switch off	200 Ω or higher
   G102-2 (CANL) - G48-4 (CG)	Ignition switch off	200 Ω or higher
   G102-3 (CANH) - G48-16 (BAT)	Ignition switch off	6 kΩ or higher
   G102-2 (CANL) - G48-16 (BAT)	Ignition 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	REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 7 JUNCTION CONNECTOR - NO. 5 JUNCTION CONNECTOR)

OK
REPLACE NO. 7 JUNCTION CONNECTOR

22.CONNECT CONNECTOR

1. Reconnect the A73 No. 5 junction connector.
   

NEXT

23.CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 JUNCTION CONNECTOR - NO. 5 JUNCTION CONNECTOR)

1. Disconnect the G95 No. 3 junction connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   G95-3 (CANH) - G95-14 (CANL)	Ignition switch off	108 to 132 Ω
   G95-3 (CANH) - G48-4 (CG)	Ignition switch off	200 Ω or higher
   G95-14 (CANL) - G48-4 (CG)	Ignition switch off	200 Ω or higher
   G95-3 (CANH) - G48-16 (BAT)	Ignition switch off	6 kΩ or higher
   G95-14 (CANL) - G48-16 (BAT)	Ignition switch off	6 kΩ or higher

   Text in Illustration

   *a	Rear view of wire harness connector (to No. 3 Junction Connector)
   *b	Front view of DLC3

NG	REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 3 JUNCTION CONNECTOR - NO. 5 JUNCTION CONNECTOR)

OK

24.CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 JUNCTION CONNECTOR SIDE)

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   G155-13 (CA2H) - G155-12 (CA2L)	Ignition switch off	108 to 132 Ω
   G155-13 (CA2H) - G155-4 (GND)	Ignition switch off	200 Ω or higher
   G155-12 (CA2L) - G155-4 (GND)	Ignition switch off	200 Ω or higher
   G155-13 (CA2H) - G155-2 (BATT)	Ignition switch off	6 kΩ or higher
   G155-12 (CA2L) - G155-2 (BATT)	Ignition switch off	6 kΩ or higher

   Text in Illustration

   *a	Component with harness connected (Network Gateway ECU)

NG	Go to step 25

OK
REPLACE NO. 3 JUNCTION CONNECTOR

25.CONNECT CONNECTOR

1. Reconnect the G95 No. 3 junction connector.
   

NEXT

26.CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR)

1. Disconnect the G98 No. 1 junction connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   G98-3 (CANH) - G98-14 (CANL)	Ignition switch off	108 to 132 Ω
   G98-3 (CANH) - G48-4 (CG)	Ignition switch off	200 Ω or higher
   G98-14 (CANL) - G48-4 (CG)	Ignition switch off	200 Ω or higher
   G98-3 (CANH) - G48-16 (BAT)	Ignition switch off	6 kΩ or higher
   G98-14 (CANL) - G48-16 (BAT)	Ignition switch off	6 kΩ or higher

   Text in Illustration

   *a	Rear view of wire harness connector (to No. 1 Junction Connector)
   *b	Front view of DLC3

NG	REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 1 JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR)

OK

27.CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - CLEARANCE WARNING ECU ASSEMBLY)

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   G98-2 (CANH) - G98-13 (CANL)	Ignition switch off	200 Ω or higher
   G98-2 (CANH) - G48-4 (CG)	Ignition switch off	200 Ω or higher
   G98-13 (CANL) - G48-4 (CG)	Ignition switch off	200 Ω or higher
   G98-2 (CANH) - G48-16 (BAT)	Ignition switch off	6 kΩ or higher
   G98-13 (CANL) - G48-16 (BAT)	Ignition switch off	6 kΩ or higher

   Text in Illustration

   *a	Rear view of wire harness connector (to No. 1 Junction Connector)
   *b	Front view of DLC3

NG	Go to step 29

OK

28.CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - NETWORK GATEWAY ECU)

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   G98-1 (CANH) - G98-12 (CANL)	Ignition switch off	108 to 132 Ω
   G98-1 (CANH) - G48-4 (CG)	Ignition switch off	200 Ω or higher
   G98-12 (CANL) - G48-4 (CG)	Ignition switch off	200 Ω or higher
   G98-1 (CANH) - G48-16 (BAT)	Ignition switch off	6 kΩ or higher
   G98-12 (CANL) - G48-16 (BAT)	Ignition switch off	6 kΩ or higher

   Text in Illustration

   *a	Rear view of wire harness connector (to No. 1 Junction Connector)
   *b	Front view of DLC3

NG	Go to step 31

OK
REPLACE NO. 1 JUNCTION CONNECTOR

29.CONNECT CONNECTOR

1. Reconnect the G98 No. 1 junction connector.
   

NEXT

30.CHECK FOR SHORT IN CAN BUS WIRES (CLEARANCE WARNING ECU ASSEMBLY)

1. Disconnect the I1 clearance warning ECU assembly connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   I1-3 (R1) - I1-5 (R2)	Ignition switch off	54 to 69 Ω
   I1-3 (R1) - G48-4 (CG)	Ignition switch off	200 Ω or higher
   I1-5 (R2) - G48-4 (CG)	Ignition switch off	200 Ω or higher
   I1-3 (R1) - G48-16 (BAT)	Ignition switch off	6 kΩ or higher
   I1-5 (R2) - G48-16 (BAT)	Ignition switch off	6 kΩ or higher

   Text in Illustration

   *a	Front view of wire harness connector (to Clearance Warning ECU Assembly)
   *b	Front view of DLC3

NG	REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO CLEARANCE WARNING ECU ASSEMBLY (R1, R2)

OK
REPLACE CLEARANCE WARNING ECU ASSEMBLY (LandCruiser RM00000470500NX.html)

31.CONNECT CONNECTOR

1. Reconnect the G98 No. 1 junction connector.
   

NEXT

32.CHECK FOR SHORT IN CAN BUS WIRES (NETWORK GATEWAY ECU)

1. Disconnect the G155 network gateway ECU connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   G155-13 (CA2H) - G155-12 (CA2L)	Ignition switch off	108 to 132 Ω
   G155-13 (CA2H) - G48-4 (CG)	Ignition switch off	200 Ω or higher
   G155-12 (CA2L) - G48-4 (CG)	Ignition switch off	200 Ω or higher
   G155-13 (CA2H) - G48-16 (BAT)	Ignition switch off	6 kΩ or higher
   G155-12 (CA2L) - G48-16 (BAT)	Ignition switch off	6 kΩ or higher

   Text in Illustration

   *a	Rear view of wire harness connector (to Network Gateway ECU)
   *b	Front view of DLC3

NG	REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO NETWORK GATEWAY ECU (CA2H, CA2L)

OK
REPLACE NETWORK GATEWAY ECU (LandCruiser RM0000039R5027X.html)

33.CHECK HARNESS AND CONNECTOR (NETWORK GATEWAY ECU - BATTERY AND BODY GROUND)

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

   NOTICE:

   When disconnecting the cable, some systems need to be initialized after the cable is reconnected (LandCruiser RM000003YMF011X.html).

2. Disconnect the G155 network gateway ECU connector.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   G155-4 (GND) - Body ground	Always	Below 1 Ω

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

   Standard Voltage:

   Tester Connection	Condition	Specified Condition
   G155-2 (BATT) - Body ground	Always	11 to 14 V
   G155-10 (IG1) - Body ground	Ignition switch ON	11 to 14 V
   G155-9 (IG2) - Body ground	Ignition switch ON	11 to 14 V

Text in Illustration

*a	Rear view of wire harness connector (to Network Gateway ECU)

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK
REPLACE NETWORK GATEWAY ECU (LandCruiser RM0000039R5027X.html)