B0012 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B0012 – Driver Frontal Deployment Loop Stage 1

 

B0012 Possible Symptoms

 

Air Bag Warning Light ON

 

B0012 Possible Causes

 

Faulty Steering Wheel Inflator Module,Faulty Steering Wheel Module Coil,Steering Wheel Inflator Module harness is open or shorted,Steering Wheel Inflator Module circuit poor electrical connection,Faulty Sensing and Diagnostic Module (SDM)

 

B0012 Description

 

If a malfunction is detected, a Diagnostic Trouble Code (DTC) will be stored in non-volatile memory. During a frontal crash of sufficient force the inflatable restraint Sensing and Diagnostic Module (SDM) will allow current to flow through the deployment loop in order to deploy the steering wheel module. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage. There are 2 shorting bars used within each connector which will short together both steering wheel module stage 1 high circuit and steering wheel module stage 1 low circuit and both steering wheel module stage 2 high circuit and steering wheel module stage 2 low circuit when the connector is disconnected. This will help to prevent unwanted deployment of the inflator module during servicing.