Buckle pretensioner (hereinafter referred to BUPT) is located beside driver and passenger seat. BUPT tightens seat belt with BPT and keeps seat belt tensioned. It is consist of buckle and gas generator. Buckle tightens seat belt. Gas generator generates gas to tighten cable.
Never measure resistance of any air bag module directly, Current of measuring device may cause unexpected airbag depoy.
The SRSCM sets DTC B1704 if there is a short to power in DBUPT harness.
*In this case, SRSCM checks if there’s any fault in circuit by sending current for a while.
Item | Detecting Condition | Possible Cause | |
DTC Strategy | ● Check Voltage | ● Short to power in DBUPT harness. ● Poor connection of connected part. ● Poor connection between shorting bar and release pin. ● Faulty DBUPT. ● Faulty SRSCM. | |
Enable Conditions | ● Ignition "ON" | ||
Threshold Value | ● Squib circuit voltage > 4.1 V | ||
Diagnostic Time | Qualification | ● More than 2 sec | |
De-Qualification | ● More than 4 sec | ||
Test Condition | Voltage |
Ignition ON | Squib circuit voltage : approx. 2.5 ~ 3V |
