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Home >> Lexus >> 2007 >> RX 400h AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 320 (Supplemental Restraint System) >> Occupant Classification System >> DTC B1780 Front Occupant Classification Sensor LH Circuit Malfunction >> Description

DTC B1780 Front Occupant Classification Sensor LH Circuit Malfunction: Description

WARNING: This page is about a different car, the 2008 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.

The front occupant classification sensor LH circuit consists of the occupant classification ECU and the front occupant classification sensor LH.

DTC B1780 is recorded when a malfunction is detected in the front occupant classification sensor LH circuit.

DTC TROUBLE DETECTION CONDITION

DTC No. DTC Detection Condition Trouble Area
B1780 When one of following conditions is met:
  • Occupant classification ECU detects line short signal, open signal, short to ground signal or short to B+ signal in the front occupant classification sensor LH circuit for 2 seconds
  • Front occupant classification sensor LH malfunction
  • Occupant classification ECU malfunction
  • Front seat wire RH
  • Front seat RH (Front occupant classification sensor LH)
  • Occupant classification ECU