Nissan Altima 2007-2012 Service Manual: B1xxx air bag diagnosis sensor unit

Description

DTC B1XXX AIR BAG DIAGNOSIS SENSOR UNIT

The air bag diagnosis sensor unit will run self diagnostics when the ignition switch is turned ON. It has the potential to set many diagnostic trouble codes which will conform to the B1XXX format, but will not match any other SRS diagnostic trouble codes. Refer to SRC-67, "Trouble Diagnosis with CONSULT-III".

PART LOCATION

Refer to SRC-7, "SRS Component Parts Location".

DTC Logic

DTC DETECTION LOGIC

With CONSULT-lll

Without CONSULT-lll

DTC CONFIRMATION PROCEDURE (With CONSULT-lll)

1.INSPECTION START

Turn ignition switch ON.

>> GO TO 2.

2.CHECK SELF-DIAG RESULT

Check for the DTC on CONSULT-lll.

Is the DTC detected? YES >> Refer to SRC-50, "Diagnosis Procedure (Component Diagnosis)".

NO >> Inspection End.

DTC CONFIRMATION PROCEDURE (Without CONSULT-lll)

NOTE: SRS will not enter diagnosis mode if no malfunction is detected in user mode.

1.IGNITION SWITCH

Turn ignition switch ON.

>> GO TO 2

2.IGNITION SWITCH

After air bag warning lamp lights for 7 seconds, turn ignition switch OFF within 1 second.

>> GO TO 3

3.WAIT TIME

Wait more than 3 seconds.

>> GO TO 4

4.REPEAT STEPS

Repeat steps 1 to 3 twice.

>> GO TO 5

5.IGNITION SWITCH

Turn ignition switch ON.

>> GO TO 6

6.DIAGNOSTIC MODE

SRS system is now in diagnostic mode and AIR BAG warning lamp flashes. Refer to SRC-70, "Trouble Diagnosis without CONSULT-III".

>> END

Diagnosis Procedure (Component Diagnosis)

Recheck SRS after each replacement.

1.HARNESS CONNECTOR

Is there any visible damage to the connector? YES or NO

YES >> Replace the harness.

NO >> GO TO 2

2.WIRING HARNESS

Is there any visible damage to the harness? YES or NO

YES >> Replace the harness.

NO >> GO TO 3

3.AIR BAG DIAGNOSIS SENSOR UNIT

Replace the air bag diagnosis sensor unit. Refer to SR-17, "Removal and Installation".

>> GO TO 4

4.RELATED HARNESS

Replace the related harness.

>> END

    B1113 – B1115 satellite sensor RH
    Description DTC B1113 – B1115 SATELLITE SENSOR RH The satellite sensor RH is wired to the air bag diagnosis sensor unit. The air bag diagnosis sensor unit will monitor the satellite sensor RH f ...

    B1023 passenger air bag off indicator
    Description DTC B1023 FRONT PASSENGER AIR BAG OFF INDICATOR The front passenger air bag off indicator is wired to the air bag diagnosis sensor unit. The air bag diagnosis sensor unit monitors the ...

    Other materials:

    Basic inspection
    COMPONENT INSPECTION Inspection AFTER A COLLISION WARNING: Inspect all seat belt assemblies including retractors and attaching hardware after any collision. NISSAN/INFINITI recommends that all seat belt assemblies in use during a collision be replaced unless the collision was minor and t ...

    Precaution
    Supplemental Restraint System (SRS) AIR BA G 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 ...

    P1778 step motor - function
    Description • The step motor's 4 aspects of ON/OFF change according to the signal from TCM. As a result, the flow of line pressure to primary pulley is changed and pulley ratio is controlled. • This diagnosis item is detected when electrical system is OK, but mechanical system is NG. ...