General Description

DTC Description

DTC Detecting Condition

Item		Detecting Condition	Possible cause
DTC Strategy		• Check current(PWM type)	• Short to power in BS harness. • Open circuit in BBS harness. • Poor connection of connected part. • Faulty BS. • Faulty SRSCM.
Enable Conditions		• Ignition "ON"
Threshold Value		• I < 3 mA
Diagnostic Time	Qualification	• More than 1 sec.
	De-Qualification	• More than 2 sec.

Specification

Test Condition	Ampere (mA)
Ignition ON	• Unbuckled (S/W OFF) : Approx . 4 ~ 7 mA • Buckled (S/W ON) : Approx. 12 ~ 18 mA

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 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 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 "Main harness circuit inspection" procedure.

Main harness Circuit Inspection (I)

1.	Ignition "OFF".

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

3.	Disconnect Seat-belt Buckle Switch connector and SRSCM main harness connector.

4.	Measure resistance between of the Buckle switch wiring connector and SRSCM harness connector. ■ Specification : approx. 1 Ω below

5.	Is the measured resistance within specifications? ▶ Go to "Main harness circuit inspection" 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.

Main harness Circuit Inspection (II)

1.	Ignition "OFF".

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

3.	Disconnect Seat-belt Buckle Switch 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 "High" of the Seat-belt Buckle Switch harness connector and chassis ground. ■ Specification : 0V

6.	Is the measured voltage within specifications? ▶ Go to "Component Inspection" 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.

Component Inspection

1.	Ignition "ON" & Engine "OFF" and Using a scantool, clear the DTC.

2.	Ignition "OFF".

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

4.	Disconnect Seat-belt Buckle Switch connector.

5.	Substitute the Seat-belt Buckle Switch and check for proper operation.

6.

Is DTC present problem ? ▶ 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 a known-good Seat-belt Buckle Switch, and check for proper operation. If the problem is corrected, replace Seat-belt Buckle Switch and then go to "Verification of Vehicle Repair" procedure.

Verification of Vehicle Repair