Circuit Description

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

DTC B1781 is recorded when a malfunction is detected in the occupant classification sensor front RH circuit.

Fig 1: DTC Condition Detecting Chart

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HINT:

• When DTC B1650/32 is detected as a result of troubleshooting for the supplemental restraint system, perform troubleshooting for DTC B1781 of the passenger occupant classification system.
• Use the hand-held tester to check the DTC of the occupant classification ECU, otherwise the DTC cannot be read.