DTC B1275: Accessory Bus Buffer Communication Stop: Procedure

WARNING: This page is about a different car, the 2011 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

CHECK RESISTANCE OF COMMUNICATION LINE

Disconnect the D16, D7 and IR connectors.

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

Resistance

Tester Connection	Condition	Specified Condition
D16-1 (MPX+) - IR-9	Always	Below 1 Ω
D16-2 (GBSI) - D7-14 (GBS)	Always	Below 1 Ω

Result

Result	Proceed to
Both are OK	A
One is OK	B
Both are NG	C

B → REPLACE OPTION CONNECTOR AND REPAIR OR REPLACE HARNESS OR CONNECTOR

C → REPAIR OR REPLACE HARNESS OR CONNECTOR

A → REPLACE OPTION CONNECTOR