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Home >> Nissan-Datsun >> 2003 >> Sentra SE-R Spec V >> Repair and Diagnosis >> External Pages >> Different car >> Section 2203 (SRS Airbag Control System) >> DTC/Circuit Diagnosis >> DTC B1017, B1018, B1019, B1020, B1021, B1022: Occupant Classification System >> DTC Logic >> DTC Detection Logic
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DTC Detection Logic

WARNING: This page is about a different car, the 2011 Nissan Xterra. However, it is still accessible from the selected car via links, so may be relevant.

With CONSULT-III

DTC DETECTION LOGIC REFERENCE CHART

CONSULT-III name DTC DTC detecting condition Repair order
OCCUPANT SENS C/U [UNIT FAIL] B1017 The OCS control unit is malfunctioning.
  1. Replace the RH front seat cushion assembly. Do not disassemble the seat cushion assembly.
B1021
B1020 The OCS control unit is malfunctioning.
  1. Replace the harness if it has visible damage.
  2. Replace the RH front seat cushion assembly. Do not disassemble the seat cushion assembly.
  3. Replace the RH front seat belt assembly.
OCCUPANT SENS [UNIT FAIL] B1018 The OCS sensor is malfunctioning.
  1. Visually check the wiring harness connection to the OCS sensor.
  2. Replace the RH front seat cushion assembly. Do not disassemble the seat cushion assembly.
BELT TENSION SENS [UNIT FAIL] B1019 The belt tension sensor is malfunctioning.
  1. Visually check the wiring harness connection.
  2. Replace the harness if it has visible damage.
  3. Replace the RH front seat belt assembly.
  4. Replace the RH front seat cushion assembly. Do not disassemble the seat cushion assembly.
  5. Replace the related harness.
OCCUPANT SENS C/U [COMM FAIL] B1022 Communication between the OCS control unit and the air bag diagnosis sensor unit is interrupted.
  1. Visually check the wiring harness connection.
  2. Replace the harness if it has visible damage.
  3. Replace the RH front seat cushion assembly. Do not disassemble the seat cushion assembly.
  4. Replace the air bag diagnosis sensor unit.
  5. Replace the related harness.

Without CONSULT-III

DTC DETECTION LOGIC REFERENCE CHART

< Occupant classification system >
Flash pattern Repair order
a through d are repeated.
d: Five flashes indicate malfunctioning occupant classification system control unit.
G07155666
  1. Visually check the wiring harness connection.
  2. Replace the harness if it has visible damage.
  3. Replace the RH front seat cushion occupant classification system control unit assembly.
  4. Replace the air bag diagnosis sensor unit.
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