DTC 025
DTC 025CIRCUIT 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 air bag module by letting the infinitesimal current flow through the internal circuit and verify the resistance. 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.
DIAGNOSTIC AIDS
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 normal blinking, 7 times during 7 seconds, then it is regarded as a defect, old or current. Please inspect the defect with a scan tool.
TEST
