Nissan Altima 2007-2012 Service Manual: B1017 – b1022 occupant classification system
Description
DTC B1017 – B1022 OCCUPANT CLASSIFICATION SYSTEM (OCS)
The occupant classification system control unit is wired to the air bag diagnosis sensor unit. The air bag diagnosis sensor unit will monitor the occupant classification system for control unit and sensor mat failures and interuptions in communication between the OCS control unit and the air bag diagnosis sensor unit.
PART LOCATION
Refer to SRC-7, "SRS Component Parts Location".
DTC Logic
DTC DETECTION LOGIC
With CONSULT-lll
Without CONSULT-lll
DTC CONFIRMATION PROCEDURE (With CONSULT-lll)
1.INSPECTION START
Turn ignition switch ON.
>> GO TO 2.
2.CHECK SELF-DIAG RESULT
Check for the DTC on CONSULT-lll.
Is the DTC detected? YES >> Refer to SRC-55, "Diagnosis Procedure (Component Diagnosis)".
NO >> Inspection End.
DTC CONFIRMATION PROCEDURE (Without CONSULT-lll)
NOTE: SRS will not enter diagnosis mode if no malfunction is detected in user mode.
1.IGNITION SWITCH
Turn ignition switch ON.
>> GO TO 2
2.IGNITION SWITCH
After air bag warning lamp lights for 7 seconds, turn ignition switch OFF within 1 second.
>> GO TO 3
3.WAIT TIME
Wait more than 3 seconds.
>> GO TO 4
4.REPEAT STEPS
Repeat steps 1 to 3 twice.
>> GO TO 5
5.IGNITION SWITCH
Turn ignition switch ON.
>> GO TO 6
6.DIAGNOSTIC MODE
SRS system is now in diagnostic mode and AIR BAG warning lamp flashes. Refer to SRC-7, "SRS Component Parts Location".
>> END
Diagnosis Procedure (Component Diagnosis)
Recheck SRS after each replacement.
1.DTC
Does CONSULT-III indicate B1022? YES or NO
YES >> GO TO 2
NO >> GO TO 4
2.HARNESS CONNECTOR
Is there any visible damage to the connector? YES or NO
YES >> Replace the harness.
NO >> GO TO 3
3.WIRING HARNESS
Is there any visible damage to the harness? YES or NO
YES >> Replace the harness.
NO >> GO TO 4
4.RH FRONT SEAT CUSHION ASSEMBLY
Replace the RH front seat cushion assembly. Refer to SE-23, "Removal and Installation".
>> GO TO 5
5.AIR BAG DIAGNOSIS SENSOR UNIT
Replace the air bag diagnosis sensor unit. Refer to SR-17, "Removal and Installation".
>> END.
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On-vehicle repair
BATTERY
Removal and Installation
REMOVAL
1. Remove air duct (front). Refer to EM-25, "Removal and Installation" QR25DE
models, EM-129, "Removal
and Installation" VQ35DE models.
2. Loosen battery terminal nuts, and disconnect both battery terminals.
CAUTION:
When disc ...
Power distribution system
System Description
INPUT/OUTPUT SIGNAL CHART
SYSTEM DESCRIPTION
• PDS (POWER DISTRIBUTION SYSTEM) is the system that BCM controls with the
operation of the pushbutton
ignition switch and performs the power distribution to each power circuit. This
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of the mechanical ...
Automatic door locks
● All doors lock automatically when the vehicle
speed reaches 15 MPH (24 km/h).
● All doors unlock automatically when the ignition
is placed in the OFF position.
The automatic unlock function can be deactivated
or activated. To deactivate or activate
the automatic door unlock sys ...