Up to 08/2009
SUPPLEMENTAL RESTRAINT SYSTEMS: OCCUPANT CLASSIFICATION SYSTEM: B1790: Center Airbag Sensor Assembly
Communication Circuit Malfunction
B1790 - Center Airbag Sensor Assembly Communication Circuit Malfunction
DESCRIPTION
The center airbag sensor assembly communication circuit consists of the occupant classification ECU and center airbag sensor assembly.
DTC B1790 is stored when a malfunction is detected in the center airbag sensor assembly communication circuit.
HINT
When DTC B1650/32 is detected as a result of troubleshooting for the airbag system, check the DTCs stored in the occupant
classification ECU. When DTC B1790 is output, perform troubleshooting for the DTC.
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT
* If troubleshooting (wire harness inspection) is difficult to perform, remove the front passenger seat installation bolts to see
under the seat cushion.
* In the above case, hold the seat so that it does not fall down. Hold the seat only as necessary because holding the seat for a long
period of time may cause seat rail deformation.
PROCEDURE
1. CHECK CONNECTORS
(a) Turn the engine switch off.
(b) Disconnect the cable from the negative (-) battery terminal.
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
(c) Check that the connectors are properly connected to the center airbag sensor assembly and occupant classification ECU. Also check
that the connectors that link the front seat wire RH and floor wire are properly connected.
OK:
The connectors are properly connected.
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