DTC 057
DTC 057CIRCUIT DESCRIPTION
When the ignition switch is turned to ON, the sensing and diagnostic module (SDM) will perform a turn-on test to diagnose critical malfunctions within the SDM itself.
The 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 inspects the wiring connection to the passenger side air bag module by letting the infinitesimal current flow through the internal circuit and verify the resistance.
CONDITIONS FOR SETTING THE DTC
- The resistance of the driver side air bag deployment loop is lower than 1.4 ohms.
- The shorting bar is damaged and the SDM must be replaced.
TEST
