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Home >> Lexus >> 2008 >> IS 250 RWD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 33 (Supplemental Restraint System) >> Airbag System >> DTC B1905/74 Short in Front Passenger Side Pretensioner Squib Circuit; DTC B1906/74 Open in Front Passenger Side Pretensioner Squib Circuit; DTC B1907/74 Short to GND in Front Passenger Side Pretensioner Squib Circuit; DTC B1908/74 Short to B+ in Front Passenger Side Pretensioner Squib Circuit >> Description

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

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.

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

This circuit instructs SRS to deploy when deployment conditions are met

These DTCs are recorded when a malfunction is detected in the front passenger side pretensioner squib circuit

DTC DETECTION CONDITION CHART

DTC No. DTC Detection Condition Trouble Area
B1905/74
  • The center airbag sensor assembly receives a line short circuit signal 5 times in the front passenger side pretensioner squib circuit during primary check
  • Front passenger side pretensioner squib malfunction
  • Center airbag sensor assembly malfunction
  • Floor wire
  • Front seat outer belt assembly RH (Front passenger side pretensioner squib)
  • Center airbag sensor assembly
B1906/74
  • The center airbag sensor assembly receives an open circuit signal in the front passenger side pretensioner squib circuit for 2 seconds
  • Front passenger side pretensioner squib malfunction
  • Center airbag sensor assembly malfunction
  • Floor wire
  • Front seat outer belt assembly RH (Front passenger side pretensioner squib)
  • Center airbag sensor assembly
B1907/74
  • The center airbag sensor assembly receives a short circuit to ground signal in the front passenger side pretensioner squib circuit for 0 5 seconds
  • Front passenger side pretensioner squib malfunction
  • Center airbag sensor assembly malfunction
  • Floor wire
  • Front seat outer belt assembly RH (Front passenger side pretensioner squib)
  • Center airbag sensor assembly
B1908/74
  • The center airbag sensor assembly receives a short circuit to B+ signal in the front passenger side pretensioner squib circuit for 0 5 seconds
  • Front passenger side pretensioner squib malfunction
  • Center airbag sensor assembly malfunction
  • Floor wire
  • Front seat outer belt assembly RH (Front passenger side pretensioner squib)
  • Center airbag sensor assembly
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