Air bag warning lamp is located at cluster. When key is in ‘ignition on’ position, SRSCM performs diagnosis of overall air bag system.If there’s no fault, air bag. Warning lamp in cluster flickers for a whlie and then goes out. SRSCM measures voltage of out terminal of warning lamp to check if warnning lamp is operated in accordance with signal SRSCM sends.
The SRSCM sets DTC B2500 if there is any fault in air bag warning light circuit.
Item | Detecting Condition | Possible cause | |
DTC Strategy | ● Check voltage | ● Burnt-out fuse. ● Burnt-out warning lamp. ● Open circuit in warning lamp harness. ● Short circuit in warning lamp harness. ● Faulty SRSCM. | |
Case 1 | Enable conditions | ● Ignition "ON" ● When AWL is commanded ON by the ACU and Shorted to Battery | |
Threshold value | ● Battery voltage > 1.5 V | ||
Case 2 | Enable conditions | ● Ignition "ON" ● When AWL is commanded OFF by the ACU and Open or shorted to ground | |
Threshold value | ● Battery voltage < 5 V | ||
Diagnostic Time | Qualification | ● More than 1.2 sec remaining | |
De-Qualification | ● More than 2(Open)~17(Short) sec remaining | ||
