General Description

Never measure resistance of BPT directly, Current of measuring device may cause unexpected BPT depoy.

DTC Description

DTC Detecting Condition

Item		Detecting Condition	Possible cause
DTC Strategy		• Check Resistance	• Short to ground in DBPT harness. • Poor connection of connected part. • Faulty BPT. • Faulty SRSCM.
Enable Conditions		• Ignition "ON"
Threshold Value		• Rs < 2 kΩ
Diagnostic Time	Qualification	• More than 4 sec
	De-Qualification	• More than 8 sec

Specification

Test Condition	Resistance
Ignition ON	RS >10kΩ

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 ? ▶ 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.

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 bar/shorting bar release pin and 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 "Squib Circuit Inspection" procedure.

Squib Circuit Inspection

1.	Ignition "OFF".

2.	Disconnect (-) terminal cable from battery and wait for 1 minutes or more.

3.	Disconnect BPT module and connect the dummy (0957A-38200) and dummy adapter (0957A-2G000) to main harness connector. If dummy and dummy adaptor are not able to be prepared, use a known-good BPT or 2Ω resistor.

4.	Connect (-) terminal cable to battery and Ignition "ON" & Engine "OFF" and wait for 30 seconds or more.

5.	Connect scantool to Data Link Connector(DLC) and clear DTC with scantool and diagnose again.

6.	Is DTC present problem ? ▶ Go to "Main harness circuit inspection" procedure. ▶ Substitute a known-good BPT assembly, and check for proper operation. If the problem is corrected, replace BPT and then go to "Verification of Vehicle Repair" procedure.

1.	Ignition "OFF".

2.	Disconnect the battery (-) terminal cable from the battery and wait at least one minutes.

3.	Disconnect BPT connector and SRSCM main harness connector.

4.	Connect the battery (-) terminal cable to the battery and Ignition "ON" & Engine "OFF"

5.	Measure voltage between terminal "Low" or "High" of the BPT harness connector and chassis ground. Specification : approx. 0V

6.

Is the measured voltage within specifications? ▶ Substitute a known-good SRSCM, and check for proper operation. If the problem is corrected, replace SRSCM and then go to "Verification of Vehicle Repair" procedure. ▶ Substitute the SRS main harness and check for proper operation. If the problem is corrected, replace SRS main harness and then go to "Verification of Vehicle Repair" procedure.

Verification of Vehicle Repair