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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 B1900/73: Short in Front Pretensioner Squib RH Circuit; DTC B1901/73: Open in Front Pretensioner Squib RH Circuit; DTC B1902/73: Short to GND in Front Pretensioner Squib RH Circuit; DTC B1903/73: Short to B+ in Front Pretensioner Squib RH Circuit >> Description

DTC B1900/73: Short in Front Pretensioner Squib RH Circuit; DTC B1901/73: Open in Front Pretensioner Squib RH Circuit; DTC B1902/73: Short to GND in Front Pretensioner Squib RH Circuit; DTC B1903/73: Short to B+ in Front Pretensioner Squib RH Circuit: Description

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

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 RH circuit.

DTC No. DTC Detection Condition Trouble Area
B1900/73 When one of following conditions is met:
  • Center airbag sensor assembly detects line short circuit signal in front pretensioner squib RH circuit 5 times during primary check.
  • Front pretensioner squib RH malfunction
  • Center airbag sensor assembly malfunction
  • Floor wire
  • Front seat outer belt assembly RH (Front pretensioner squib RH)
  • Center airbag sensor assembly
B1901/73 When one of following conditions is met:
  • Center airbag sensor assembly detects open circuit signal in front pretensioner squib RH circuit for 2 seconds.
  • Front pretensioner squib RH malfunction
  • Center airbag sensor assembly malfunction
B1902/73 When one of following conditions is met:
  • Center airbag sensor assembly detects short circuit to ground signal in front pretensioner squib RH circuit for 0.5 seconds.
  • Front pretensioner squib RH malfunction
  • Center airbag sensor assembly malfunction
B1903/73 When one of following conditions is met:
  • Center airbag sensor assembly detects short circuit to B+ signal in front pretensioner squib RH circuit for 0.5 seconds.
  • Front pretensioner squib RH malfunction
  • Center airbag sensor assembly malfunction