DTC B1800: Short in D Squib Circuit; DTC B1801: Open in D Squib Circuit; DTC B1802: Short in D Squib Circuit (to Ground); DTC B1803: Short in D Squib Circuit (to +B): Description

The driver side squib circuit consists of the airbag ECU assembly, spiral cable sub-assembly and horn button assembly.
The airbag ECU assembly uses this circuit to deploy the airbag when deployment conditions are met.
These DTCs are stored when a malfunction is detected in the driver side squib circuit.

DTC No.	DTC Detection Condition	Trouble Area
B1800	The airbag ECU assembly receives a line short circuit signal in the driver side squib circuit during primary check. Spiral cable sub-assembly malfunction Driver side squib malfunction Airbag ECU assembly malfunction	Instrument panel wire Spiral cable sub-assembly Horn button assembly (Driver side squib) Airbag ECU assembly
B1801	The airbag ECU assembly receives an open circuit signal in the driver side squib circuit. Spiral cable sub-assembly malfunction Driver side squib malfunction Airbag ECU assembly malfunction
B1802	The airbag ECU assembly receives a short circuit to ground signal in the driver side squib circuit. Spiral cable sub-assembly malfunction Driver side squib malfunction Airbag ECU assembly malfunction
B1803	The airbag ECU assembly receives a short circuit to B+ signal in the driver side squib circuit. Spiral cable sub-assembly malfunction Driver side squib malfunction Airbag ECU assembly malfunction