Networking. Can Communication System (For Lhd Without Central Gateway Ecu) Multi-Media Module Receiver Assembly Communication Stop Mode

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

Networking. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

Detection Item	Symptom	Trouble Area
Multi-media Module Receiver Assembly Communication Stop Mode	Either Condition is met: "Display and Navigation (AVN1)" is not displayed on the "Bus Check" screen (Click here). Communication system DTCs (DTCs that start with U) that are output correspond to "Multi-media Module Receiver Assembly Communication Stop Mode" in "DTC Combination Table" (Click here).	Multi-media module receiver assembly CAN branch wire or connector Power source circuit of multi-media module receiver assembly Multi-media module receiver assembly ground circuit Multi-media module receiver assembly

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.
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).
Inspect the fuses for circuits related to this system before performing the following inspection procedure.

Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.
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 (MULTI-MEDIA MODULE RECEIVER ASSEMBLY CAN BRANCH WIRE)

REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO MULTI-MEDIA MODULE RECEIVER ASSEMBLY (CANH, CANL)

OK

2.CHECK HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY - BATTERY AND BODY GROUND)

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).

Text in Illustration
*a	Front view of wire harness connector (to Multi-media Module Receiver Assembly)

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY (Click here)

Tester Connection	Condition	Specified Condition
F77-1 (CANH) - F77-2 (CANL)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω