COMPONENT LOCATION |
GENERAL DESCRIPTION |
Seat Belt Pretensioner(hereinafter referred to BPT) is located at both side of center pillar.
BPT tightens seat belt before air bag deploys to protect passenger from bumping against crush pad, steering wheel and front window.
In BPT, there are a ignition circuit and cylinder for rewinding belt.
Cylinder has piston that can rewind seat belt in it.
Gas chamber generates expansive force of gases to push piston in cylinder.
Never measure resistance of BPT directly, Current of measuring device may cause unexpected BPT depoy. |
DTC DESCRIPTION |
The SRSCM sets DTC B1362 if the measured resistance value of DBPT circuit is less than the threshold value.
*In this case, SRSCM checks if there’s any fault in circuit by sending current for a while.
DTC DETECTING CONDITION |
Item | Detecting Condition | Possible cause | |||||||||||
DTC Strategy |
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Enable Conditions |
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Threshold Value |
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Diagnostic Time | Qualification |
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De-Qualification |
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SPECIFICATION |
Test Condition | Resistance |
Ignition ON | 1.6Ω ≤ Squib resistance ≤ 6.0Ω |
DIAGNOSTIC CIRCUIT DIAGRAM |
MONITOR SCANTOOL DATA |
1. | Ignition “OFF”, connect scantool. |
2. | Ignition “ON”& Engine “OFF”, select “Current Data” mode. |
3. | Monitor the “Pretensioner front-Driver resistance” parameter on the Scantool.
Fig.1) Normal Data |
4. | Is parameter displayed within specifications?
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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?
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SQUIB CIRCUIT INSPECTION |
1. | Ignition “OFF”. |
2. | Disconnect (-) terminal cable from battery and wait for 1 minutes or more. |
3. | Disconnect DBPT module and connect the dummy and dummy adapter to main harness connector.
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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 ?
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MAIN HARNESS CIRCUIT INSPECTION |
1. | Ignition “OFF”. |
2. | Disconnect the battery (-) terminal cable from the battery and wait at least one minutes. |
3. | Disconnect DBPT connector and SRSCM main harness connector. |
4. | Measure resistance between terminal “Low” and “High” of the DBPT harness connector.
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5. | Is the measured resistance within specifications?
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