Networking. Can Communication System (For Rhd Without Entry And Start System) 4Wd Control Ecu Communication Stop Mode

DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

CHECK FOR OPEN IN CAN BUS WIRE (FOUR WHEEL DRIVE CONTROL ECU CAN BRANCH WIRE)

CHECK HARNESS AND CONNECTOR (FOUR WHEEL DRIVE CONTROL ECU - BATTERY AND BODY GROUND)

CAN COMMUNICATION SYSTEM (for RHD without Entry and Start System) - 4WD Control ECU Communication Stop Mode

DESCRIPTION

Detection Item	Symptom	Trouble Area
4WD Control ECU Communication Stop Mode	Either condition is met: "Four Wheel Drive Control" is not displayed on the "Bus Check". "4WD Control ECU Communication Stop Mode" in "DTC Combination Table" applies.	Power source circuit of four wheel drive control ECU Four wheel drive control ECU CAN branch wire or connector Four wheel drive control ECU

WIRING DIAGRAM

Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Networking.Lin Communication System.Can Communication System (For Rhd Without Entry And Start System) 4Wd Control Ecu Communication Stop Mode

INSPECTION PROCEDURE

NOTICE:

Inspect the fuses for circuits related to this system before performing the following 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

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 FOR OPEN IN CAN BUS WIRE (FOUR WHEEL DRIVE CONTROL ECU CAN BRANCH WIRE)

Disconnect the G53 four wheel drive control ECU connector.

Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Switch Condition
Specified Condition
G53-19 (CANH) - G53-20 (CANL)
Ignition switch off
54 to 69 Ω
Text in Illustration
*a
Rear view of wire harness connector
(to Four Wheel Drive Control ECU)

REPAIR OR REPLACE FOUR WHEEL DRIVE CONTROL ECU CAN BRANCH WIRE OR CONNECTOR (CANH, CANL)

OK

3.CHECK HARNESS AND CONNECTOR (FOUR WHEEL DRIVE CONTROL ECU - BATTERY AND BODY GROUND)

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).

Disconnect the G54 four wheel drive control ECU connector.

Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Condition
Specified Condition
G54-4 (GND) - Body ground
Always
Below 1 Ω

Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
Switch Condition
Specified Condition
G54-3 (IG) - Body ground
Ignition switch ON
11 to 14 V

Text in Illustration
*a	Rear view of wire harness connector (to Four Wheel Drive Control ECU)

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE FOUR WHEEL DRIVE CONTROL ECU (LandCruiser RM00000479S00VX.html)

Tester Connection	Switch Condition	Specified Condition
G53-19 (CANH) - G53-20 (CANL)	Ignition switch off	54 to 69 Ω

Tester Connection	Condition	Specified Condition
G54-4 (GND) - Body ground	Always	Below 1 Ω