Bus Buffer ECU Communication Stop Mode

NETWORKING: CAN COMMUNICATION SYSTEM: Bus Buffer ECU Communication Stop Mode

Bus Buffer ECU Communication Stop Mode

DESCRIPTION





HINT: w/ Bus buffer ECU

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.

PROCEDURE

1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
(a) Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the main wire and the branch wire.

CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

NEXT -- Continue to next step.

2. CHECK FOR OPEN IN CAN BUS WIRE (BUS BUFFER ECU BRANCH WIRE)




(a) Disconnect the H66 bus buffer ECU connector.
(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE BUS BUFFER ECU BRANCH WIRE OR CONNECTOR (CAN+, CAN-)
OK -- REPLACE BUS BUFFER ECU