B1102 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B1102 – Airbag Battery Voltage Low

 

B1102 Possible Symptoms

 

Air Bag Warning Light ON

 

B1102 Possible Causes

 

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

 

B1102 Description

 

When the ignition switch is turned to ON, the Sensing and Diagnostic Module (SDM) will perform turn-on test to diagnose critical malfunctions within SDM itself. Upon passing these test ignition and deployment loop voltages are measured to ensure that they are within their normal voltage ranges. The SDM monitors the voltages at the driver low and the passenger low to detect shorts to ground or voltage in the deploy loops. The SDM checks the wiring connection to each inflator by letting the infinitesimal current flow through the internal circuit and verify the resistance. But if the voltage is out of range, SDM is unable to check the airbag system properly.