B1495

DTC B1495 BTS (BELT-TENSION SENSOR) DEFECT

GENERAL DESCRIPTION
Sensing seat belt tension, belt tension sensor sends signals to PODS ECU. Sensing the intensity of pressure from pressure sensor and tension from belt tensioner, PODS ECU decide a passenger as an adult or a child.

DTC DESCRIPTION
The SRSCM sets DTC B1450 if OC Passenger Sensor with wrong ID is detected.

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 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?

YES - Repair as necessary and then go to "Verification of Vehicle Repair" procedure.

NO - Go to "CAN COMM' LINE Inspection" procedure.

POWER CIRCUIT INSPECTION
1. Engine "OFF".
2. Disconnect the battery (-) terminal cable from the battery and wait at least one minute.
3. Disconnect Belt tension sensor connector.
4. Ignition "ON" & Engine "OFF".




5. Measure voltage between terminal "3" of the Belt tension sensor connector and chassis ground.

Specification : approx. 5 V

6. Is the measured voltage within specifications?

YES - Go to "Ground Circuit Inspection" procedure.

NO
- After reparing open in power circuit or short circuit of belt tension sensor, go to "Verification vehicle Repair" procedure.
- Substitute a known-good Belt tension sensor, and check for proper operation. If the problem is corrected, replace the Belt.

GROUND CIRCUIT INSPECTION
1. Engine "OFF".
2. Disconnect Belt tension sensor connector.




3. Measure resistance between terminal "2" of the Belt tension sensor connector and chassis ground.

Specification : approx. 1 ohm below.

4. Is the measured resistance within specifications?

YES - Go to "Signal Circuit Inspection" procedure.

NO
- After reparing open in ground circuit or short circuit of belt tension sensor, go to "Verification vehicle Repair" procedure.
- Substitute a known-good Belt tension sensor, and check for proper operation. If the problem is corrected, replace the Belt.

SIGNAL CIRCUIT INSPECTION
1. Connect Belt tension sensor connector & PODS MODULE.
2. Ignition "ON" & Engine "OFF".
3. When mounting seat belt, check belt tension signals for change for various belt tension.




4. Measure voltage between terminal "8" of the Belt tension sensor connector and chassis ground.

Specification : approx. 0 - 5 V

5. Is the measured voltage within specifications?

YES
- Check Belt tension sensor for contamination, deterioration, or damage.
- Substitute with a known-good Belt tension sensor and check for proper operation.
If the problem is corrected, replace Belt tension sensor and then go to "Verification of Vehicle Repair".

NO
- Substitute a known-good Belt tension sensor, and check for proper operation.
If the problem is corrected, replace the Belt tension sensor and then go to "Verification of Vehicle Repair" procedure.

- Substitute a known-good PODS ECU, and check for proper operation.
If the problem is corrected, replace the PODS ECU and then 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. Initialize PODS using scantool when replacing PODS ECU.
2. Connect scantool and select "Diagnostic Trouble Codes (DTCs)" mode.
3. Using a scantool, clear the DTCs.
4. Operate the vehicle within DTC Enable conditions in General information.

YES - Go to the applicable troubleshooting procedure.

NO - System is performing to specification at this time.