Nissan Versa

 Sedan Service Manual

Restraints » SRS Airbag (SR)
Diagnosis sensor unit

Removal and Installation

1. Diagnosis sensor unit 2. Diagnosis sensor unit harness bracket Front

REMOVAL

WARNING: When replacing the air bag diagnosis sensor unit, always check with the parts department for he latest parts information. Installing an incorrect air bag diagnosis sensor unit may or may not cause the air bag warning lamp to illuminate and may cause incorrect deployment of the supplemental air bags and seat belt pre-tensioner in a collision resulting in serious personal injury or death.

CAUTION:

• Before servicing, turn ignition switch OFF, disconnect both battery terminals and wait at least three minutes.
• Before disconnecting the air bag sensor unit harness connector, be sure to disconnect the harness connector of each air bag module and pre-tensioner seat belt to prevent air bag deployment by static electricity.
• Do not use air tools or electric tools for servicing.
• Do not use old bolts after removal; replace with new bolts.
• Do not cause an impact to the diagnosis sensor unit by dropping etc. Replace the diagnosis sensor unit if it has been dropped or sustained an impact.
• Replace the diagnosis sensor unit of deployed SRS air bag and deployed SRS front seat belt pre-tensioner.

1. Always check the air bag diagnosis sensor unit ECU discriminated number (identification number) or part number using CONSULT.
2. Disconnect the negative and positive battery terminals, then wait at least three minutes. Refer to PG "Removal and Installation".
3. Disconnect the harness connectors for the following SRS components: SR "Removal and Installation", (Side curtain air bag), SB "SEAT BELT RETRACTOR : Removal and Installation" (Font seat belt pretensioner), SE "DRIVER SIDE : Disassembly and Assembly" (Side air bag module - DRIVER SIDE), SE "PASSENGER SIDE : Disassembly and Assembly" (Side air bag module - PASSENGER SIDE).
4. Remove the center console assembly. Refer to IP "Removal and Installation".
5. Disconnect the harness connectors (A) from the diagnosis sensor unit.
6. Remove the bolts (B) and the harness bracket, then remove the diagnosis sensor unit.

Front

NOTE: Shown with diagnosis sensor unit harness bracket removed for clarity.

INSTALLATION

Installation is in the reverse order of removal.

CAUTION:

• Be careful not to damage the diagnosis sensor unit harness.

• 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 by the self-diagnosis function and delete the memory by CONSULT.

• If a malfunction is still detected after the above operation, perform self-diagnosis to repair malfunctions.

  Refer to SRC "SRS Operation Check".

• After replacing the air bag diagnosis sensor unit, confirm using CONSULT that the ECU discriminated number (identification number) or part number of the new replacement air bag diagnosis sensor unit matches the ECU discriminated number (identification number) or part number of the replaced (old) air bag diagnosis sensor unit.

NOTE: If the ECU discriminated number or part number of the new replacement air bag diagnosis sensor unit differs from the ECU discriminated number or part number of the replaced air bag diagnosis sensor unit, reconfirm the parts information and verify that the correct air bag diagnosis sensor unit was installed.

SEAT BELT PRE-TENSIONER

Removal and Installation

For removal and installation procedures, refer to SB "SEAT BELT RETRACTOR : Removal and Installation".

OCCUPANT CLASSIFICATION SYSTEM CONTROL UNIT

Removal and Installation

The occupant classification system control unit, system wiring harness, and system sensors are an integral part of the front passenger seat, and are replaced with the seat assembly. Refer to SE "DRIVER SIDE : Removal and Installation".

Precautions

Collision diagnosis

Driver air bag module

Spiral cable

Passenger air bag module

Side curtain air bag module

Side air bag module

Crash zone sensor

Side air bag (satellite) sensor

Diagnosis sensor unit