DTC B0004-11, B0004-12, B0004-13, B0004-19 Or B0004-1A: Driver-Side Knee Air Bag Module Circuit (Airbag) (Us): Outline

WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.

DTC B0004:11, B0004:12, B0004:13, B0004:19 OR B0004:1A [SAS CONTROL MODULE] DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	B0004:11: Driver-side knee air bag module circuit short to body ground B0004:12: Driver-side knee air bag module circuit short to power supply B0004:13: Driver-side knee air bag module circuit open circuit or resistance high B0004:19: Short circuit to driver-side knee air bag module and other air bag module circuits B0004:1A: Driver-side knee air bag module circuit resistance low
Detection condition	WARNING: Detection conditions are for understanding the DTC outline before performing an inspection. Performing an inspection according to only the detection conditions may cause injury due to an operating error, or damage the system. When performing an inspection, always follow the inspection procedure. Resistance other than 0.81-6.42 ohms detected in the driver-side knee air bag module circuit Malfunction in the wiring harness between the driver-side knee air bag module and SAS control module
Fail-safe	Not applicable
Possible cause	Driver-side knee air bag module connector malfunction Open circuit in driver-side knee air bag module deployment signal circuit Short circuit to body ground in driver-side knee air bag module deployment signal circuit Short circuit to power supply in driver-side knee air bag module deployment signal circuit Short circuit to each other in driver-side knee air bag module deployment signal circuit Short circuit to other air bag module circuits in driver-side knee air bag module deployment signal circuit Driver-side knee air bag module malfunction SAS control module malfunction
Courtesy of MAZDA MOTORS CORP.