Nissan Sentra Service Manual: Precaution
Precaution 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 safely is
included in the SR and SB section of
this Service Manual.
WARNING:
- To avoid rendering the SRS inoperative, which could increase
the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all
maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
- Improper maintenance, including incorrect removal and
installation of the SRS, can lead to personal
injury caused by unintentional activation of the system. For removal of
Spiral Cable and Air Bag
Module, see the SR section.
- Do not use electrical test equipment on any circuit related to
the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or
orange harnesses or harness
connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
- When working near the Airbag Diagnosis Sensor Unit or other
Airbag System sensors with the Ignition
ON or engine running, DO NOT use air or electric power tools or strike near
the sensor(s) with a
hammer. Heavy vibration could activate the sensor(s) and deploy the air
bag(s), possibly causing
serious injury.
- When using air or electric power tools or hammers, always
switch the Ignition OFF, disconnect the
battery and wait at least three minutes before performing any service.
Precaution for Procedure without Cowl Top Cover
When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc to prevent damage to
windshield.

Liquid Gasket
REMOVAL OF LIQUID GASKET SEALING
- After removing the bolts and nuts, separate the mating surface and
remove the liquid gasket using Tool (A).
Tool Number (A): KV10111100 (J-37228)
CAUTION:
Be careful not to damage the mating surfaces.
- In areas where the cutter is difficult to use, use a plastic hammer to
lightly tap (1) the cutter where the liquid gasket is applied. Use a
plastic hammer to slide (2) the cutter by tapping on the side.
CAUTION:
Do not damage the mating surfaces.

LIQUID GASKET APPLICATION PROCEDURE
- Using suitable tool (A), remove old liquid gasket adhering to the
liquid gasket application surface and the mating surface.
- Remove liquid gasket completely from the groove of the liquid
gasket application surface, mounting bolts, and bolt holes.
- Wipe the liquid gasket application surface and the mating surface
with white gasoline (lighting and heating use) to remove
adhering moisture, grease and foreign materials.

- Attach liquid gasket tube using suitable tool.
Use Genuine Liquid Gasket or equivalent.
- Apply liquid gasket without gaps to the specified location according
to the specified dimensions.
- If there is a groove for liquid gasket application, apply liquid
gasket to the groove.

(A) : Groove
: Inside

- Within five minutes of liquid gasket application,
install the mating
component.
- If liquid gasket protrudes, wipe it off immediately.
- Do not retighten mounting bolts or nuts after the
installation.
- After 30 minutes or more have passed from the
installation, fill
engine oil and engine coolant.
CAUTION:
If there are specific instructions in this manual,
observe them.
Precaution for TCM and Transaxle Assembly Replacement
CAUTION:
- To replace TCM, refer to TM-142, "Description".
- To replace transaxle assembly, refer to TM-144, "Description".
Precaution for G Sensor Removal/Installation or Replacement
CAUTION:
To remove/install or replace G sensor, refer to TM-147, "Description".
General Precautions
- Turn ignition switch OFF and disconnect the battery cable
from the negative terminal before connecting or disconnecting
the CVT assembly harness connector. Because battery
voltage is applied to TCM even if ignition switch is turned
OFF.




- Always use the specified brand of CVT fluid. Refer to MA-11, "Fluids and
Lubricants".
- Use lint-free paper not cloth rags during work.
- Dispose of the waste oil using the methods prescribed by law, ordinance,
etc. after replacing the CVT fluid.
On Board Diagnosis (OBD) System of CVT and Engine
The ECM has an on board diagnostic system. It will light up the malfunction
indicator lamp (MIL) to warn the
driver of a malfunction causing emission deterioration.
CAUTION:
- Be sure to turn the ignition switch OFF and disconnect the battery
cable from the negative terminal
before any repair or inspection work. The open/short circuit of related
switches, sensors, solenoid
valves, etc. will cause the MIL to light up.
- Be sure to connect and lock the connectors securely after work. A
loose (unlocked) connector will
cause the MIL to light up due to an open circuit. (Be sure the connector is
free from water, grease,
dirt, bent terminals, etc.)
- Be sure to route and secure the harnesses properly after work.
Interference of the harness with a
bracket, etc. may cause the MIL to light up due to a short circuit.
- Be sure to connect rubber tubes properly after work. A
misconnected or disconnected rubber tube
may cause the MIL to light up due to a malfunction of the EGR system or fuel
injection system, etc.
- Be sure to erase the unnecessary malfunction information (repairs
completed) from the TCM and
ECM before returning the vehicle to the customer.
Removal and Installation Procedure for CVT Unit Connector
REMOVAL
- Rotate bayonet ring (A) counterclockwise. Pull out CVT unit harness
connector (B) upward and remove it.

INSTALLATION
- Align marking (A) on CVT unit harness connector terminal with
marking (B) on bayonet ring. Insert CVT unit harness connector.
- Rotate bayonet ring clockwise.

- Rotate bayonet ring clockwise until marking (A) on CVT unit harness
connector terminal body is aligned with the slit (B) on bayonet
ring as shown in the figure (correctly fitting condition).

- Securely align marking (A) on CVT unit harness connector
terminal body with bayonet ring slit (B). Then, be careful
not to make a half fit condition as shown in the figure.
- Never mistake the slit of bayonet ring for other dent portion.

General Precautions
- Always use the specified brand of CVT fluid.
- Use lint-free paper not cloth rags during work.
- Dispose of the waste oil using the methods prescribed by law, ordinance,
etc. after replacing the CVT fluid.
Special Service Tools
The actual shapes of Kent-Moore tools may differ from those of special
service tools illustrated here.
*: The O-ring as a unit part is set as a SST.
Commercial Service ...
Other materials:
Fuel pump shut off
system
To minimize the risk of fuel leakage when the engine stalls or
when an airbag inflates upon collision, the fuel pump shut off
system stops the supply of fuel to the engine.
Follow the procedure below to restart the engine after the system is
activated.
Vehicles without a smart key system
1. Tu ...
Audio operation precautions
Compact disc (CD) player
CAUTION
Do not force a compact disc into the CD
insert slot. This could damage the CD
and/or CD player.
Trying to load a CD with the CD door
closed could damage the CD and/or CD
player.
Only one CD can be loaded into the CD
player at a time.
Only ...
Tcm branch line circuit
Diagnosis Procedure
1.Check connector
Turn the ignition switch off.
Disconnect the battery cable from the negative terminal.
Check the following terminals and connectors for damage, bend and loose
connection (unit side and connector
side).
TCM
Harness connector f50
Harness co ...
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