Nissan Versa

 Sedan Service Manual

Restraints » SRS Airbag control system (SRC)
Occupant classification system

OCCUPANT CLASSIFICATION SYSTEM : System Diagram

OCCUPANT CLASSIFICATION SYSTEM : System Description

The occupant classification system (OCS) identifies different size occupants, out of position occupants, and detects if child seat is present in the front passenger seat. The OCS control unit (2) receives inputs from the occupant classification sensors (1) (located inside the passenger seat cushion assembly). Depending on classification of the passenger, the OCS sends a signal to the air bag diagnosis sensor unit. The air bag diagnosis sensor unit uses this signal and the seat belt buckle switch RH signal to determine deployment or non deployment of the passenger front air bag in the event of a collision. Depending on the signals received, the air bag diagnosis sensor unit can disable the passenger front air bag completely. The OCS (weight sensors) must be set to zero point using CONSULT after servicing the OCS system.

NOTE:

• CONSULT can be used to confirm when "zero point reset" for OCS is complete.
• Always perform zero point reset after the removal and installation of the seat or when disconnecting the OCS control unit harness connector even if zero point reset has been completed in the past.
• If zero point reset is incomplete, the passenger air bag will be disabled and the passenger air bag off indicator will be ON.
• In case of customer concern, CONSULT can be used to confirm the passenger air bag status (readiness).

Passenger Air Bag Status Conditions   

NOTE: Passenger does not meet Occupant Classification System specifications for passenger air bag activation.

Precautions

Component parts

SRS Air bag system

Occupant classification system

Seat belt warning lamp system

Diagnosis system (air bag)

Diagnosis sensor unit

Diagnosis and repair work flow

Inspection and adjustment

B1049 - B1052, B1054 - B1057 Driver airbag module

B1065 - B1068, B1070 - B1073 Passenger airbag module

B1134 - B1137 Side airbag module LH

B1129 - B1132 Side airbag module RH

B1150 - B1153 Side curtain air bag module LH

B1145 - B1148 Side curtain air bag module RH

B1086 - B1089 Seat belt pre-tensioner LH

B1081 - B1084 Seat belt pre-tensioner RH

B1033 - B1035 Crash zone sensor

B1118 - B1120 Satellite sensor LH

B1113 - B1115 Satellite sensor RH

B1343 - B1349 Front door satellite sensor LH

B1336 - B1342 Front door satellite sensor RH

B1350 Front door satellite sensors

B1XXX Air bag diagnosis sensor unit

B1023 Passenger air bag off indicator

B1017, B1018, B1020, B1021, B1022, B1025, B1032, B1048 OCS System

B1209 - B1210 Collision detection

SRS Air bag warning lamp does not turn on

SRS Air bag warning lamp does not turn off

Seat belt warning system