B2500

DTC B2500

Circuit 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.

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.

If the warning lamp operates properly ON and OFF, the SDM measures the voltage continuously from the warning lamp terminal.

Conditions for Setting the DTC

The warning lamp does not blink properly ON and OFF.

Reference

When the ignition switch is turned ON, the warning lamp blinks 7 times during 7 seconds.

If the warning lamp stays ON or blinks a second after the above normal blinking, 7 times during 7 seconds, then it is regarded as a defect, old or current. Please inspect the defect with the scan tool.