DTC B1794: Open in Occupant Classification ECU Battery Positive Line (TO 12/2010): Description

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.

This circuit consists of the occupant classification ECU and the power source circuit (battery, fuse, wire harness).

DTC B1794 is recorded when a malfunction is detected in the occupant classification ECU or the power source circuit.

HINT:

When DTC B1794 is output after switching the ignition switch off-on (IG)-off 50 times in a row when a malfunction occurs in the power circuit for the occupant classification system, the DTC is output again when a malfunction is detected even once after being cleared, unless the normal system code is input.

DTC No.	DTC Detecting Condition	Trouble Area
B1794	The ignition switch is turned from off to on (IG), hold for 10 seconds or more, and back to off again 50 times in a row when a malfunction occurs in the circuit for the occupant classification system. Occupant classification ECU malfunction	Battery ECU-B Fuse Floor wire No. 2 Front seat wire RH Occupant classification ECU