Nissan Altima (L32) 2007-2012 Service Manual: Occupant classification system
System Diagram
Occupant Classification System (OCS)
The occupant classification system (OCS) identifies if a child or child seat is present in the front passenger seat. The OCS receives inputs from the occupant classification sensor mat (located inside the passenger seat cushion assembly). Depending on classification of the passenger, the OCS control unit 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 front passenger air bag module in the event of a collision. Depending on the signals received, the air bag diagnosis sensor unit can disable the front passenger air bag module completely.
NOTE: In case of customer concern, CONSULT-III can be used to confirm the front passenger air bag status (readiness).
Front Passenger Air Bag Status Conditions
NOTE: Passenger does not meet Occupant Classification System specifications for passenger air bag activation.
1. Seat cushion foam
2. OCS control unit
3. OCS sensor mat
4. OCS sensor mat cell (internal)
SRS air bag system
SRS Configuration The air bag deploys if the air bag diagnosis sensor unit is activated while the ignition switch is in the ON or START position. The collision modes for which supplemental r ...Passenger seat belt warning system
System Diagram System Description The seat belt warning lamp (1) will remind the driver if the driver or front passenger seat belt should be buckled. The system works in conjunction with the oc ...Other materials:
Hazard switch
Removal and Installation
Removal
1. Remove the cluster lid C. Refer to IP-12, "Removal and Installation".
2. Remove CVT finisher or M/T finisher. Refer to TM-255, "Removal and
Installation" or TM-21, "Removal
and Installation".
3. Remove the hazard switch scr ...
Refrigeration system
HFC-134a (R-134a) Service Procedure
SETTING OF SERVICE TOOLS AND EQUIPMENT
WARNING:
Avoid breathing the A/C refrigerant and oil vapor or mist. Exposure may irritate
eyes, nose, and throat.
Remove the HFC-134a (R-134a) from the A/C system using certified service
equipment meeting the
requ ...
ABS branch line circuit
Diagnosis Procedure
INSPECTION PROCEDURE
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connectors of the ABS actuator and electric unit
(control unit) for damage, bend
and loose connection (unit ...