B2500
DTC B2500 SRS WARNING LAMP FAILUREGENERAL 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 while and then goes out. SRSCM measures voltage of out terminal of warning lamp to check if warming lamp is operated in accordance with signal SRSCM sends.
DTC DESCRIPTION
The SRSCM sets DTC B2500 if there is on open circuit or short to ground in airbag circuit harness.
DTC Detecting Condition:
Schematic Diagram:
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 scantool, clear the DTC.
5. Is DTC present problem?
YES - Go to "W/Harness Inspection" procedure.
NO
- 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.
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?
YES - Repair as necessary and then go to "Verification of Vehicle Repair" procedure.
NO - Go to "Main Harness Circuit Inspection" procedure.
MAIN HARNESS CIRCUIT INSPECTION
1. Ignition "OFF".
2. Disconnect the battery (-) terminal cable from the battery, and wait at least one minutes.
3. Disconnect SRSCM main harness connector.
4. Connect the battery (-) terminal cable to the battery and Ignition "ON" & Engine "OFF".
5. Measure voltage between Air Bag IND terminal of the SRSCM harness connector and chassis ground.
Specification : Approx. Batt Voltage
6. Is the measured voltage within specifications?
YES - 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.
NO - Check airbag fuse, junction block, Warning Lamp, harness between junction block and SRSCM . Repair as necessary and go to "Verification of Vehicle Repair" procedure.
VERIFICATION OF VEHICLE REPAIR
After a repair, it is essential to verify that the fault has been corrected.
1. Connect scantool and select "Diagnostic Trouble Codes (DTC)" mode.
2. Using a scantool, clear the DTC.
3. Operate the vehicle within DTC Enable conditions in General information.
4. Are any DTC present?
YES - Go to the applicable troubleshooting procedure.
NO - System is performing to specification at this time.