4.
Using a scantool, clear the DTC.
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. | |
Case1 | Enable Conditions | ● Ignition "ON" ● When AWL is commanded ON by the ACU and Shorted to Battery | |
Threshold Value | ● Battery voltage ＞ 1.5 V | ||
Case2 | 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 | ||
Ignition "OFF", connect scantool.
Ignition "ON"＆ Engine "OFF", select "Diagnostic Trouble Codes(DTC)" mode.
Monitor diagnostic trouble code and present of trouble code.
Using a scantool, clear the DTC.
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.
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.
Thoroughly check shorting connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
Has a problem been found?
▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure.
▶ Go to "Warning lamp Circuit Inspection" procedure.
Ignition "OFF".
Remove the Instrument cluster from crash pad assembly.
Ignition "ON" ＆ Engine "OFF".
Measure voltage between terminal "M01-B(11)"of the Instrument cluster harness connector and chassis ground.
pecification : Batt Voltage
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, junction block, Warning Lamp, harness between junction block and SRSCM . Repair as necessary and go to "Verification of Vehicle Repair" procedure.
Refer to the DESCRIPTION in this TROUBLESHOOTING section.
