DTC B1793: Occupant Classification Sensor Power Supply Circuit Malfunction [08/2013 - 08/2016]: Description

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The occupant classification sensor power supply circuit consists of the occupant detection ECU and rear occupant classification sensors.

DTC B1793 is stored when a malfunction is detected in the occupant classification sensor power supply circuit.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B1793	Occupant Classification Sensor Power Supply Circuit Malfunction	The occupant detection ECU detects a line short, short to ground or B+ in the occupant classification sensor power supply circuit. Rear occupant classification sensor LH malfunction Rear occupant classification sensor RH malfunction Occupant detection ECU malfunction	for TMMMS Made: Front seat wire RH Rear occupant classification sensor LH (Separate type front seat cushion spring assembly RH)* Rear occupant classification sensor RH (Separate type front seat cushion spring assembly RH)* Occupant detection ECU for TMMC Made: Front seat inner belt assembly RH Front seat wire RH Rear occupant classification sensor LH (Front seat adjuster sub-assembly RH)* Rear occupant classification sensor RH (Front seat adjuster sub-assembly RH)* Occupant detection ECU

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B1793

Occupant Classification Sensor Power Supply Circuit Malfunction

The occupant detection ECU detects a line short, short to ground or B+ in the occupant classification sensor power supply circuit.
Rear occupant classification sensor LH malfunction
Rear occupant classification sensor RH malfunction
Occupant detection ECU malfunction

for TMMMS Made:

Front seat wire RH
Rear occupant classification sensor LH (Separate type front seat cushion spring assembly RH)*
Rear occupant classification sensor RH (Separate type front seat cushion spring assembly RH)*
Occupant detection ECU

for TMMC Made:

Front seat inner belt assembly RH
Front seat wire RH
Rear occupant classification sensor LH (Front seat adjuster sub-assembly RH)*
Rear occupant classification sensor RH (Front seat adjuster sub-assembly RH)*
Occupant detection ECU

*: The rear occupant classification sensor LH and RH are built into the separate type front seat cushion spring assembly RH or front seat adjuster sub-assembly RH.