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Home >> Scion >> 2013 >> iQ Base >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Supplemental Restraint System (Diagnostic Codes B1693/81 - B1908/74 & Symptom Tests) (Except Electric) >> Airbag System >> DTC B1905/74: Short in Front Pretensioner Squib LH Circuit; DTC B1906/74: Open in Front Pretensioner Squib LH Circuit; DTC B1907/74: Short to GND in Front Pretensioner Squib LH Circuit; DTC B1908/74: Short to B+ in Front Pretensioner Squib LH Circuit >> Description

DTC B1905/74: Short in Front Pretensioner Squib LH Circuit; DTC B1906/74: Open in Front Pretensioner Squib LH Circuit; DTC B1907/74: Short to GND in Front Pretensioner Squib LH Circuit; DTC B1908/74: Short to B+ in Front Pretensioner Squib LH Circuit: Description

The front pretensioner squib LH circuit consists of the center airbag sensor assembly and the front seat outer belt assembly LH.

This circuit signals the SRS to deploy when deployment conditions are met.

These DTCs are recorded when a malfunction is detected in the front pretensioner squib LH circuit.

DTC No. DTC Detection Condition Trouble Area
B1905/74 When one of following conditions is met:
  • Center airbag sensor assembly detects line short circuit signal in front pretensioner squib LH circuit 5 times during primary check.
  • Front pretensioner squib LH malfunction
  • Center airbag sensor assembly malfunction
  • Floor wire
  • Front seat outer belt assembly LH (Front pretensioner squib LH)
  • Center airbag sensor assembly
B1906/74 When one of following conditions is met:
  • Center airbag sensor assembly detects open circuit signal in front pretensioner squib LH circuit for 2 seconds.
  • Front pretensioner squib LH malfunction
  • Center airbag sensor assembly malfunction
B1907/74 When one of following conditions is met:
  • Center airbag sensor assembly detects short circuit to ground signal in front pretensioner squib LH circuit for 0.5 seconds.
  • Front pretensioner squib LH malfunction
  • Center airbag sensor assembly malfunction
B1908/74 When one of following conditions is met:
  • Center airbag sensor assembly detects short circuit to B+ signal in front pretensioner squib LH circuit for 0.5 seconds.
  • Front pretensioner squib LH malfunction
  • Center airbag sensor assembly malfunction