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) [06/2018 - ]: Description

The driver 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 squib circuit.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Warning Indicate	Test Mode / Check Mode
B1800	Short in D Squib Circuit	The airbag ECU assembly detects a line short in the driver squib circuit during the primary check. Spiral cable sub-assembly malfunction Driver squib malfunction Airbag ECU assembly malfunction	Instrument panel wire Spiral cable sub-assembly Driver squib (Horn button assembly) Airbag ECU assembly	Comes on	Applies to check mode
B1801	Open in D Squib Circuit	The airbag ECU assembly detects an open in the driver squib circuit. Spiral cable sub-assembly malfunction Driver squib malfunction Airbag ECU assembly malfunction	Instrument panel wire Spiral cable sub-assembly Driver squib (Horn button assembly) Airbag ECU assembly	Comes on	Applies to check mode
B1802	Short in D Squib Circuit (to Ground)	The airbag ECU assembly detects a short to ground in the driver squib circuit. Spiral cable sub-assembly malfunction Driver squib malfunction Airbag ECU assembly malfunction	Instrument panel wire Spiral cable sub-assembly Driver squib (Horn button assembly) Airbag ECU assembly	Comes on	Applies to check mode
B1803	Short in D Squib Circuit (to +B)	The airbag ECU assembly detects a short to B+ in the driver squib circuit. Spiral cable sub-assembly malfunction Driver squib malfunction Airbag ECU assembly malfunction	Instrument panel wire Spiral cable sub-assembly Driver squib (Horn button assembly) Airbag ECU assembly	Comes on	Applies to check mode