Nissan Versa
 Sedan Service Manual
Engine » Engine cooling system (CO)

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRETENSIONER"

The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRETENSIONER", 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. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.

Information necessary to service the system safely is included in the SR and SB section of this Service Manual.


  • 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.



  • 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 3 minutes before performing any service.


Special Service Tool

The actual shapes of KentMoore tools may from those of special service tools illustrated here.

Tool number (KentMoore No.) Tool name Description
KV991J0070 (J45695) Coolant refill tool                        Refilling engine cooling system
EG17650301 (J33984A) Radiator cap tester adapter    Adapting radiator cap tester to radiator cap and radiator filler neck a: 28 (1.10) dia.

b: 31.4 (1.236) dia.

c: 41.3 (1.626) dia.

Unit: mm (in)

- (J23688) Engine coolant refractometer Checking concentration of ethylene glycol in engine coolant

Commercial Service Tool

Tool name Description
Power tool                   Loosening nuts, screws and bolts
Radiator cap tester         Checking radiator and radiator cap
    More about «Engine cooling system (CO)»:



    Engine coolant


    Cooling fan

    Water pump


    Water outlet

    Nissan Versa Sedan Service Manual / Engine / Engine cooling system (CO) / Precaution

    Nissan Versa Sedan Service Manual


    © 2017-2023 Copyright