REMOVAL
CAUTION:
Before servicing, turn the ignition switch OFF, disconnect both battery terminals and wait at least three minutes.
Do not use air or electric tools when removing or installing the combination switch.
Remove the chassis control module (with built in steering angle sensor). Refer to Removal and Installation.
Loosen
screw (A). 
Disconnect the harness connector from the combination switch and remove.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
After the work is completed, make sure no system malfunction is detected by air bag warning lamp.
In case a malfunction is detected by the air bag warning lamp, reset with the self-diagnosis function and delete the memory with CONSULT.
If a malfunction is still detected after the above operation, perform self-diagnosis to repair malfunctions. Refer to Description.
Exploded ViewPrecaution for supplemental restraint system (SRS) "air bag" and "seat
belt pre-tensioner"
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”,
used along
with a front seat belt, helps to reduce the risk or severity of injury to the
driver and front passenger for certain
types of collision. Information necessary to service the system ...
Signal Buffer
Consult Function (bcm - Signal Buffer)
CONSULT Function
(BCM - SIGNAL BUFFER)
DATA MONITOR
Note:
The following table includes information (items)
inapplicable to this Nissan Sentra vehicle. For information (items) applicable to
this vehicle, refer to CONSULT display items.
...
Back-Up Lamp Relay Circuit
Component Function Check
Component Function
Check
CHECK BACK-UP LAMP OPERATION
Ignition switch ON.
With operating the shift selector, check that the
back-up lamp is turn ...