SRS Airbag Control System: Other Nissan Note E12

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 SRS AIRBAG and SEAT BELTS article of this Service Information.

PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS

Service

1. Never use electrical test equipment to check SRS circuits unless instructed to in this Service Information.
2. Before servicing the SRS, turn ignition switch OFF, disconnect battery negative terminal and wait 3 minutes or more. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, never work on any SRS connectors or wires until at least 3 minutes have passed.
3. Diagnosis sensor unit must always be installed with their arrow marks "<==" pointing towards the front of the vehicle for proper operation. Also check diagnosis sensor unit for cracks, deformities or rust before installation and replace as required.
4. The spiral cable must be aligned with the neutral position since its rotations are limited. Never turn steering wheel and column after removal of steering gear.
5. Handle air bag module carefully. Always place driver and front passenger air bag modules with the pad side facing upward and seat mounted front side air bag module standing with the stud bolt side facing down.
6. Conduct self-diagnosis to check entire SRS for proper function after replacing any components.
7. After air bag inflates, the front instrument panel assembly should be replaced if damaged.
8. Always replace instrument panel pad following front passenger air bag deployment.
9. Never solder the harness when making repairs. Check that harness is not pinched and that there is no contact with other components.
10. Never allow harness to come in contact with oil, grease, waste oil, or water.
11. Never insert foreign materials, such as a screwdriver, into the harness connector. (This is to prevent accidental activation caused by static electricity.)
12. Always use CONSULT or SRS air bag warning lamp to perform the circuit diagnosis. (Never use an electric tester such as a circuit tester.)

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Driver Air Bag Module

The driver air bag module is dual stage and located in the steering wheel assembly. It operates with the SRS system in a frontal collision exceeding a specified level.

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Front Passenger Air Bag Module

The front passenger air bag module is dual stage and is located behind the instrument panel assembly. It operates with the SRS system in a frontal collision exceeding a specified level. Refer to " SRS AIR BAG SYSTEM: SYSTEM DESCRIPTION " for more information.

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Front Side Air Bag Module

Front side air bag modules are built into the front seatback assemblies. Vehicles with side air bags are equipped with labels as shown below.

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Side Curtain Air Bag Module

Side curtain air bag modules are located above the vehicle headlining. Vehicles with side curtain air bags are equipped with labels on the pillar upper finishers.

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Front Seat Belt Pre-tensioner

The seat belt pre-tensioner system with load limiter is installed for both the driver's seat and the front passenger's seat. It operates simultaneously with the SRS air bag system in the event of a frontal collision with an impact exceeding a specified level.

When the frontal collision with an impact exceeding a specified level occurs, seat belt slack resulting from clothing or other factors is immediately taken up by the belt pre-tensioner. Vehicle passengers are securely restrained.

When passengers in a vehicle are thrown forward in a collision and the restraining force of the seat belt exceeds a specified level, the load limiter permits the specified extension of the seat belt by the twisting of the ELR shaft, and a relaxation of the chest-area seat belt web tension while maintaining force.

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Crash Zone Sensor

The crash zone sensor is located in front of the radiator. The crash zone sensor sends signals to the air bag diagnosis sensor unit during a frontal collision. This sensor may be identified by a yellow connector.

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Front Side Air Bag Satellite Sensor

The front side air bag satellite sensors are located on the front center pillar LH and RH next to the seat belt pretensioners. The front side air bag satellite sensors send signals to the air bag diagnosis sensor unit during a side collision. These sensors may be identified by yellow connectors.

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Rear Side Air Bag Satellite Sensor

The rear side air bag satellite sensors are located behind the luggage side lower finisher LH and RH. The rear side air bag satellite sensors send signals to the air bag diagnosis sensor unit during a side collision. These sensors may be identified by yellow connectors.

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Front Door Satellite Sensor

The front door satellite sensors are located in the driver and passenger doors. The front door satellite sensors send signals to the air bag diagnosis sensor unit during a side collision. These sensors may be identified by yellow connectors.

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DIRECT CONNECT

The following SRS components use direct-connect style harness connectors.

1. Driver front air bag module
2. Passenger front air bag module
3. LH side curtain air bag module
4. RH side curtain air bag module
5. Front LH seat belt pre-tensioner
6. Front RH seat belt pre-tensioner

Always pull up to release locking tab prior to removing connector from SRS component.

Always push down to lock locking tab after installing connector to SRS component. When locked, the locking tab is level with the connector housing.

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SLIDE DOUBLE LOCKING

1. A new style slide double locking type connector is used on certain systems and components, especially those related to airbag control systems.
2. The slide double locking type connectors help prevent incomplete locking and accidental looseness or disconnection.
3. The slide double locking type connectors are disconnected by pushing or pulling the slider. Refer to the figure below.

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METHOD OF STARTING

1. Diagnosis mode changes from user mode to diagnosis mode when changing operation is performed.
2. In user mode, when SRS air bag warning lamp is not turning ON, changing to diagnosis mode by ignition switch operation is not possible.
3. In diagnosis mode, when repair is complete and system is normal, the mode changes to user mode when ignition switch is turned from OFF to ON.

USER MODE

In USER MODE, air bag warning lamp on combination meter turns ON when a malfunction is detected and warns the customer (driver).

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1. Turn the ignition switch from OFF to ON, and check that the air bag warning lamp turns ON.
2. Compare the air bag warning lamp operation pattern with the examples. Air Bag Warning Lamp Examples: AIR BAG WARNING LAMP FLASHING PATTERN Warning lamp SRS condition Reference item No malfunction is detected. No further action is necessary. - The system is malfunctioning and needs to be repaired. Refer to " «TROUBLE DIAGNOSIS WITH CONSULT»(ref-675619-S27778745142014120500000) " or " «ON BOARD DIAGNOSIS FUNCTION»(ref-675619-S31519686352014120500000) ". Air bag is deployed. Seat belt pre-tensioner is deployed. Refer to " «FOR FRONTAL COLLISION»(ref-675573-S02035143862014120500000) " or " «FOR SIDE AND ROLLOVER COLLISION»(ref-675573-S10206977952014120500000) ". Air bag diagnosis sensor unit is malfunctioning. Air bag power supply circuit is malfunctioning. SRS air bag warning lamp circuit is malfunctioning. Refer to " «DIAGNOSIS PROCEDURE»(ref-675619-S08899293742014120500000) ". Air bag diagnosis sensor unit is malfunctioning. Air bag warning lamp circuit is malfunctioning. Refer to " «DIAGNOSIS PROCEDURE»(ref-675619-S19666399982014120500000) ".

SRS HISTORY CHECK

1. Check repair history of the SRS. If no repairs have been made, perform " «ON BOARD DIAGNOSIS FUNCTION»(ref-675619-S31519686352014120500000) ". If repairs have been made, GO TO step 2.
2. Erase "SELF-DIAG [PAST]" after repair. Refer to " «ON BOARD DIAGNOSIS FUNCTION»(ref-675619-S31519686352014120500000) ".

CONSULT Function (AIR BAG)

CONSULT can display each diagnostic item using the diagnostic test modes shown following.

How to read flash codes

1. Put the vehicle in Diagnosis Mode. Refer to " «ON BOARD DIAGNOSIS FUNCTION»(ref-675619-S31519686352014120500000) ".
2. All codes are proceded by a seven second "holding" flash.
3. Identify how many primary flashes are displayed as well as the length of each primary flash.
4. Refer to the tables and examples below to determine which SRS subsystem the code belongs to.
5. Count the short secondary flashes that follow the primary flashes.
6. Match the correct flashing pattern to the malfunctioning component and perform the Diagnosis Procedure. Refer to the illustrations below for an example of each flashing pattern.

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DETAILED FLOW

1. INTERVIEW THE CUSTOMER FOR THE SYMPTOM Interview the customer for the symptom (the condition and the environment when the incident/malfunction occurs). : GO TO 2.
2. CHECK SYMPTOM Check the symptom from the customer information. : GO TO 3.
3. CHECK WARNING LAMP OPERATION Check air bag warning lamp operation in the user mode. Are any malfunction detected? YES: GO TO 5 . NO: GO TO 4.
4. CHECK LOW VOLTAGE Check low voltage with CONSULT. Are any malfunction detected? YES: GO TO 9 . NO: Check intermittent incident. Refer to " «INTERMITTENT INCIDENT»(ref-675571-S38824794042014120500000) ".
5. CHECK SELF DIAGNOSTIC RESULTS Check self diagnostic result with CONSULT or diagnosis mode. If it is impossible to switch to diagnosis mode, follow the same procedure that DTC is not detected. NOTE: Perform the following procedure if DTC is detected. Record DTC (Print them out with CONSULT.) Erase self diagnostic result. Study the relationship between the malfunction that DTC or air bag warning lamp indicates and the symptom that the customer describes. Check related service bulletins for information. Is DTC detected? YES: GO TO 6. NO: GO TO 7 .
6. PERFORM DTC CONFIRMATION PROCEDURE Perform DTC CONFIRMATION PROCEDURE for the DTC. : GO TO 8 .
7. PERFORM DIAGNOSIS ACCORDING TO WARNING LAMP OPERATION Check air bag warning lamp operation in the user mode. Perform Diagnosis Procedure for the air bag warning lamp operation. : GO TO 9 .
8. DETECT MALFUNCTIONING PART BY DIAGNOSTIC PROCEDURE Inspect according to Diagnostic Procedure of the DTC. : GO TO 9.
9. REPAIR OR REPLACE THE MALFUNCTION PART Repair or replace the malfunctioning part. : GO TO 10.
10. ON BOARD DIAGNOSIS FUNCTION Check self diagnostic result and air bag warning lamp operation in the user mode. Is the malfunction repaired? YES: Inspection End. NO: GO TO 2 .

WORK PROCEDURE WHEN REPLACING CONTROL UNIT

1. PERFORM ZERO POINT RESET Perform zero point reset. Refer to " «ZERO POINT RESET: SPECIAL REPAIR REQUIREMENT»(ref-675619-S08005428972014120500000) ". Is zero point reset performed normally? YES: INSPECTION END NO: Check condition as per the following, and perform zero point reset again. Passenger seat is occupied by an object. Excessive vibration is applied while performing zero point reset. Occupant detection system is malfunctioning. NOTE: If "Incomplete" is displayed on "zero point reset current status", zero point reset is not completed normally. Check the condition as per the following and perform zero point reset again. Passenger seat is occupied by an object. Excessive vibration is applied while performing zero point reset. Occupant detection system is malfunctioning.

FRONT LH SIDE AIR BAG MODULE

The front LH side air bag module is wired to the air bag diagnosis sensor unit. The air bag diagnosis sensor unit will monitor for opens and shorts in detected lines to the front LH side air bag module.

With CONSULT

FRONT RH SIDE AIR BAG MODULE

The front RH side air bag module is wired to the air bag diagnosis sensor unit. The air bag diagnosis sensor unit will monitor for opens and shorts in detected lines to the front RH side air bag module.

SEAT BELT BUCKLE SWITCH LH

The air bag diagnosis sensor unit monitors the seat belt buckle switch LH status. If the control unit detects an open or short condition in the circuit, it will set the DTC.

SEAT BELT BUCKLE SWITCH RH

The air bag diagnosis sensor unit monitors the seat belt buckle switch RH status. If the control unit detects an open or short condition in the circuit, it will set the DTC.

FRONT SATELLITE SENSOR LH

The front side air bag satellite sensor LH is wired to the air bag diagnosis sensor unit. The air bag diagnosis sensor unit will monitor the front side air bag satellite sensor LH for internal failures and its circuits for communication errors.

FRONT SATELLITE SENSOR RH

The front side air bag satellite sensor RH is wired to the air bag diagnosis sensor unit. The air bag diagnosis sensor unit will monitor the front side air bag satellite sensor RH for internal failures and its circuits for communication errors.

REAR SATELLITE SENSOR LH

The rear side air bag satellite sensor LH is wired to the air bag diagnosis sensor unit. The air bag diagnosis sensor unit will monitor the rear side air bag satellite sensor LH for internal failures and its circuits for communication errors.

REAR SATELLITE SENSOR RH

The rear side air bag satellite sensor RH is wired to the air bag diagnosis sensor unit. The air bag diagnosis sensor unit will monitor the rear side air bag satellite sensor RH for internal failures and its circuits for communication errors.

OCCUPANT CLASSIFICATION SYSTEM (OCS)

The OCS control unit is wired to the air bag diagnosis sensor unit. The air bag diagnosis sensor unit will monitor the OCS for failures and interruptions in communication between the OCS control unit and the air bag diagnosis sensor unit.

IGNITION VOLTAGE

Ignition voltage is supplied to the air bag diagnosis sensor unit when the ignition is in the ON position. The air bag diagnosis sensor unit will monitor for low or high ignition voltage.

COLLISION DETECTION

The air bag diagnosis sensor unit will set this DTC if it has detected a collision which has resulted in a deployment of one or more air bags or pre-tensioners. If this DTC is detected after a SRS repair, the air bag diagnosis sensor unit has not yet been replaced. This DTC can not be erased.

Seat Belt Warning System Does Not Function

1. SEAT BELT WARNING LIGHT Turn ignition switch ON. Does the seat belt warning lamp come ON? YES: GO TO 2. NO: Check 10A fuse [No. 8, located in the fuse block (J/B)]. Check seat belt buckle switch (driver seat). Check harness between combination meter and seat belt buckle switch (driver seat). Check combination meter. Refer to " «METER SYSTEM: FAIL-SAFE»(ref-675593-S28372002092014120500000) ".
2. SEAT BELT BUCKLE (DRIVER SEAT) Fasten the seat belt buckle (driver seat). Does the seat belt warning lamp go OFF? YES: GO TO 3. NO: Check seat belt buckle switch (driver seat). Check harness between combination meter and seat belt buckle switch (driver seat).
3. OCCUPANT CLASSIFICATION SYSTEM Have a helper sit in the passenger seat. Does the seat belt warning lamp go ON? YES: GO TO 4. NO: Check occupant classification system. Refer to " «OCCUPANT CLASSIFICATION SYSTEM: SYSTEM DESCRIPTION»(ref-675619-S23026832672014120500000) ". Check harness between occupant classification control unit and air bag diagnosis sensor unit.
4. SEAT BELT BUCKLE (PASSENGER SEAT) Fasten the seat belt buckle (passenger seat). Does the seat belt warning lamp go OFF? YES: System OK. NO: Check seat belt buckle switch (passenger seat). Check harness between seat belt buckle switch (passenger seat) and air bag diagnosis sensor unit. Replace air bag diagnosis sensor unit. Refer to " «REMOVAL AND INSTALLATION»(ref-675573-S05882337292014120500000) ".