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DTC B1790: Center Airbag Sensor Assembly Communication Circuit Malfunction [10/2014 - 05/2019]: Description

The airbag ECU assembly communication circuit consists of the occupant detection ECU and airbag ECU assembly.

DTC B1790 is stored when a malfunction is detected in the airbag ECU assembly communication circuit.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B1790	Center Airbag Sensor Assembly Communication Circuit Malfunction	One of the following conditions is met: Occupant detection ECU detects a line short circuit signal, open circuit signal, short circuit to ground signal or short circuit to +B signal in the airbag ECU assembly communication circuit for 2 seconds. Airbag ECU assembly malfunction. Occupant detection ECU malfunction.	Floor wire Front seat wire RH Occupant detection ECU Airbag ECU assembly

HINT:

When DTC B1650/32 is stored as a result of troubleshooting the airbag system, perform troubleshooting for DTC B1790 of the occupant classification system.
Use the Techstream to check for DTCs of the occupant detection ECU, otherwise the DTCs cannot be read.