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 an open circuit or short to ground in air bag circuit harness.
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
Lamp "OFF"
Warning lamp failure Ground short or Battery short
Diagnostic
Time
Qualification
More than 1s (100msx10)
De-Qualification
More than 2 sec