Networking. Can Communication System (For Hatchback Except Separate Type Yaw Rate Sensor) Ecm Communication Stop Mode

Inspect the fuses for circuits related to this system before performing the following inspection procedure.
Turn the ignition switch off before measuring the resistances between CAN bus main wires and between CAN bus branch wires.
Turn the ignition switch off before inspecting CAN bus wires for a ground short.
After the ignition switch is turned off, check that the key reminder warning system are not operating.
Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches or the doors. If any doors need to be opened in order to check connectors, open the doors and leave them open.

Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
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 MAIN WIRE (ECM MAIN WIRE)

Text in Illustration
*a	Front view of wire harness connector (to ECM)

REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (ECM MAIN WIRE)

OK

2.CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

Tester Connection	Switch Condition	Specified Condition
A72-13 (CANH) - A72-26 (CANL)	Ignition switch off	108 to 132 Ω