Main Body ECU Communication Stop Mode

CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: Main Body ECU Communication Stop Mode
- Main Body ECU Communication Stop Mode

DESCRIPTION





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
* Turn the ignition switch off before measuring the resistances of the CAN main wire and the CAN branch wire.
* After the ignition switch is turned off, check that the key reminder warning system and light 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 the connectors, open the doors and leave them open.

HINT
* 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.

PROCEDURE

1. CHECK CAN BUS LINE FOR DISCONNECTION (MAIN BODY ECU BRANCH WIRE)

(a) Turn the ignition switch off.

(b) Disconnect the main body ECU connector.

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





Standard resistance:





NG -- REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (MAIN BODY ECU BRANCH WIRE)
OK -- Continue to next step.

2. CHECK POWER SOURCE CIRCUIT (MAIN BODY ECU)

(a) Check the main body ECU power source circuit IG Signal Circuit.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (MAIN BODY ECU)