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. | |
Enable Conditions | ● Ignition "ON" | ||
Threshold Value | ● Battery Short : If the voltage at the TL Driver is more than 1 Vol when TL is ON. ● Ground Short : If the voltage at the WL Driver is less than 1 Vol when WL is OFF. | ||
Diagnostic Time | Qualification | ● More than 2 sec | |
De-Qualification | ● More than 4 sec | ||
Test Condition | Voltage |
Telltale Lamp "ON" | VWL ≤ 6V |
Telltale Lamp "OFF" | VWL ≥ 4V |
