Dtc B Center Airbag Sensor Assembly Communication Circuit Malfunction

2007 RESTRAINTS Supplemental Restraint System - Sequoia

DESCRIPTION

The center airbag sensor assembly communication circuit consists of the occupant classification ECU and the center airbag sensor assembly.

DTC B1790 is recorded when a malfunction is detected in the center airbag sensor assembly communication circuit.

DIAGN

OSTIC TROUBLE CODE CHART

DTC No.

DTC Detecting Condition

Trouble Area

B1790

• The occupant classification ECU receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the center airbag sensor assembly communication circuit for 2 seconds.

• Occupant classification ECU

• Center airbag sensor assembly

• Seat wire No. 1

• Center airbag sensor assembly malfunction

• Occupant classification ECU malfunction

HINT:

HINT:

When DTC B1650/32 is detected as a result of troubleshooting for the supplemental restraint system, check the DTCs stored in the occupant classification ECU. When DTC B1790 is output, perform troubleshooting for the DTC.

WIRING DIAGRAM

2007 RESTRAINTS Supplemental Restraint System - Sequoia

Occupant Classification Ecu
Fig. 177: Center Airbag Sensor Assembly Communication Circuit Malfunction - Wiring Diagram Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

HINT:

• If troubleshooting (wire harness inspection) is difficult to perform, remove the passenger seat installation bolts to see the under surface of seat cushion.

• In the above case, hold the seat so that it does not fall down. Holding the seat for a long period of time may cause a problem, such as seat rail deformation. Hold the seat only as necessary.

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Responses

  • sven
    WHAT IS PART OF A CENTER AIRBAG SENSOR ASSEMBLY?
    9 years ago
  • Aloisia
    How does the occupancy classification ecu communications?
    8 years ago

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