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HOMESERVICE MANUALSTOYOTA2009COROLLA S, 1.8 U, STANDARDREPAIR AND DIAGNOSISRESTRAINTSAIR BAG, SRSSUPPLEMENTAL RESTRAINT SYSTEMOCCUPANT CLASSIFICATION SYSTEMDIAGNOSTIC TROUBLE CODE CHART
2009 Toyota Corolla S, 1.8 U, Standard

Diagnostic Trouble Code Chart

2009 Toyota Corolla S, 1.8 U, StandardSECTION Diagnostic Trouble Code Chart

HINT:

When DTC B1650/32 is detected as a result of troubleshooting for the airbag system, perform troubleshooting for the occupant classification system as shown in the chart below.

Occupant Classification System 

DIAGNOSTIC TROUBLE CODE CHART

DTC Code Detection Item Trouble Area Passenger Airbag ON/ OFF Indicator (OFF Indicator)
B1771  Passenger Side Buckle Switch Circuit Malfunction
  1. Front seat wire RH
  2. Front seat inner belt assembly RH (Passenger side buckle switch)
  3. Occupant classification ECU
 ON
B1772  Seat Position Sensor Circuit Malfunction
  1. Front seat wire RH
  2. Seat position airbag sensor (Passenger side)
  3. Occupant classification ECU
 ON
B1773  Belt Tension Sensor Circuit Malfunction
  1. No. 2 floor wire
  2. Front seat wire RH
  3. Front seat outer belt assembly RH (Seat belt tension sensor)
  4. Occupant classification ECU
 ON
B1774  Pressure Sensor Circuit Malfunction
  1. Front seat wire RH
  2. Occupant classification sensor
  3. Occupant classification ECU
 ON
B1775  Pressure Sensor Power Source Circuit Malfunction
  1. Front seat wire RH
  2. Occupant classification sensor
  3. Occupant classification ECU
 ON
B1776  Seat Belt Tension Sensor Power Source Circuit Malfunction
  1. No. 2 floor wire
  2. Front seat wire RH
  3. Front seat outer belt assembly RH (Seat belt tension sensor)
  4. Occupant classification ECU
 ON
B1790  Center Airbag Sensor Assembly Communication Circuit Malfunction
  1. No. 2 floor wire
  2. Front seat wire RH
  3. Occupant classification ECU
  4. Center airbag sensor assembly
 ON
B1795  Occupant Classification ECU Malfunction Occupant classification ECU ON
B1797  Calibration Malfunction
  1. There is no malfunction if this DTC is not output again after performing occupant classification system zero point calibration.
  2. Occupant classification sensor
  3. Occupant classification ECU
 ON
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.