Cee´d(ED) > 2010 > D 1.
6 TCI-U2 > Airbag > Airbag Control > B2500 Warning lamp
Failure
B2500 Warning lamp Failure > General Information
Component Location
General Description
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.
DTC Description
The SRSCM sets DTC B2500 if there is an open circuit or short to ground in air bag circuit harness.
DTC Detecting Condition
Item Detecting Condition Possible cause
DTC Strategy • Check voltage
• Ignition "ON"
Enable
• When AWL is commanded ON by the ACU and Shorted to
conditions
Case 1 Battery
Threshold • Burnt-out fuse.
• Battery voltage > 1.5 V • Burnt-out warning lamp.
value
• Open circuit in warning lamp
• Ignition "ON"
harness.
Qualification • When AWL is commanded OFF by the ACU and Open or
• Short circuit in warning lamp
Case 2 shorted to ground
harness.
De- • Faulty SRSCM.
• Battery voltage < 5 V
Qualification
Qualification • More than 1.2 sec remaining
Diagnostic
Time De-
• More than 2(Open)~17(Short) sec remaining
Qualification
Diagnostic Circuit Diagram
B2500 Warning lamp Failure > Scantool Diagnostics
Monitor Scantool Data
1. Ignition "OFF", connect scantool.
2. Ignition "ON"& Engine "OFF", select "Diagnostic Trouble Codes(DTC)" mode.
3. Monitor diagnostic trouble code and present of trouble code.
4. Using a scan tool, clear the DTC.
5. Is DTC present problem ?
▶ Go to "W/Harness Inspection" procedure.
▶ Displaying nothing(no DTC) or DTC with label "H"(historical) shows that Fault is intermittent caused by
poor contact in the part's and/or SRSCM connector or was repaired and SRSCM memory was not cleared.
Thoroughly check shorting bar/shorting bar release pin and connectors for looseness, poor connection,
bending, corrosion, contamination, deterioration, or damage.
▶ Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.
B2500 Warning lamp Failure > Inspection/Repair > W/Harness Inspection
Terminal and Connector Inspection
1. Many malfunctions in the electrical system are caused by poor harness and terminals.
Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check shorting connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or
damage.
3. Has a problem been found?
▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure.
▶ Go to "Warning lamp Circuit Inspection" procedure.
Warning lamp Circuit Inspection
1. Ignition "OFF".
2. Remove the Instrument cluster from crash pad assembly.
3. Ignition "ON" & Engine "OFF".
4. Measure voltage between terminal "Air bag indicator" of the Instrument cluster harness connector and chassis ground.
Specification : Battery Voltage
5. Is the measured voltage within specifications?
▶ Check warning lamp and connectors for looseness, poor connection, bending, corrosion, contamination,
deterioration, or damage.
Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.
▶ Check airbag fuse, passenger compartment junction block, harness between junction block and SRSCM .
Repair as necessary and go to "Verification of Vehicle Repair" procedure.
B2500 Warning lamp Failure > Verification of Vehicle Repair
Verification of Vehicle Repair
After a repair, it is essential to verify that the fault has been corrected.
1. Connect scan tool and select "Diagnostic Trouble Codes(DTC)" mode
2. Using a scan tool, clear the DTC.
3. Operate the vehicle within DTC Enable conditions in General information.
4. Are any DTC present ?
▶ Go to the applicable troubleshooting procedure.
▶ System is performing to specification at this time.
