General Description

DTC Description

DTC Detecting Condition

Item		Detecting Condition	Possible cause
DTC Strategy		• Check voltage	• Poor connection of connected part • Open/Short circuit in power harness. • Open/Short circuit in ground harness. • Faulty charging system • Faulty SRSCM.
Enable Conditions		• Ignition "ON"
Threshold Value		• Vbat ≤ 9.0 V
Diagnostic Time	Qualification	• More than 4 sec
	De-Qualification	• When the SRSCM returns to normal condition

Specification

Test Condition	Voltage
Idle & WOT	Approx. 8.9 V ≤ Vbatt ≤ 16.2 V

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 "Charging System Inspection" procedure.

Power Circuit Inspection

1.	Ignition "OFF".

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

3.	Disconnect the SRSCM connector.

4.	Connect the battery (-) terminal cable and start engine.

5.	Measure voltage between "Power" terminal of the SRSCM harness connector and chassis ground. Specification : Approx. 8.9 V ≤ Vbatt ≤ 16.2 V

6.

Is the measured voltage within specifications? ▶ Go to "Ground circuit inspection" procedure. ▶ Thoroughly check all connectors (and connections) for looseness, bending, corrosion, contamination, deterioration, and/or damage. Repair as necessary and then go to "Verification of Vehicle Repair" procedure.

Ground Circuit Inspection

1.	Ignition "OFF".

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

3.	Disconnect the SRSCM connector.

4.	Measure resistance between ground terminal of the SRSCM harness connector and chassis ground. Specification : Approx. 1 Ω below.

5.

Is the measured resistance 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.

Charging System Inspection

1.	Engine "ON", headight and heatwire "ON".

2.	Measure voltage between the battery terminal (+) and (-) maintaining ENG. RPM 2,500RPM (idle) over 2 minutes. Specification : Approx. 8.9 ≤ Vbatt ≤ 16.2

3.	Is the measured voltage within specifications? ▶ Go to "Power Circuit Inspection" procedure. ▶ Substitute with a known-good alternator and check for proper operation. If the problem is corrected, replace alternator and then go to "Verification of Vehicle Repair" procedure.

Verification of Vehicle Repair

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 ? ▶ Go to the applicable troubleshooting procedure. ▶ System is performing to specification at this time.