Nissan Sentra B18 (2020-2025) Service Manual / Restraints / Srs Air Bag Control System :: Dtc/circuit Diagnosis / Air Bag (air Bag Diagnosis Sensor Unit) / B0012-55 Active Vent

Nissan Sentra B18 (2020-2025) Service Manual: B0012-55 Active Vent

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen items (Trouble diagnosis content)	DTC Detection Condition
B0012-55	ACTIVE VENT [NOT CONFIGURED]	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	Active vent circuit is shorted to each other (terminals 41 and 42).
		Threshold	When a mismatch is detected between in the configuration data stored in the air bag diagnosis sensor unit and Nissan Sentra vehicle specification
		Diagnosis delay time	—

POSSIBLE CAUSE

[NOT CONFIGURED]

Connection malfunction of harness and connector
Mistake of configuration for air bag diagnosis sensor unit
Internal malfunction of air bag diagnosis sensor unit

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

CHECK SELF DIAGNOSTIC RESULT
1. CONSULT
  1. Ignition switch ON.
  2. Select "Self Diagnostic Result" mode of "AIR BAG".
  3. Check for DTC.
Is the DTC detected?
YES>>
(Current DTC) Refer to DTC Diagnosis Procedure.
YES>>
(Past DTC) GO TO 2.
NO>>
Inspection End.
ERASE SELF DIAGNOSTIC RESULT
1. CONSULT
  
  Erase the DTC.
Can the DTC be erased?
YES>>
Inspection End.
NO>>
Refer to DTC Diagnosis Procedure.

Dtc Diagnosis Procedure

DTC Diagnosis Procedure

Warning:

Before servicing, ignition switch OFF, disconnect battery negative terminal, and wait at least 3 minutes or more (to discharge backup capacitor).

Never use an unspecified tester or other measuring device.

CHECK HARNESS CONNECTOR
1. Check the harness connector.
Is the inspection result normal?
YES >>
GO TO 2.
NO >>
Replace harness connector.
CHECK WIRING HARNESS
1. Check the wiring harness externals.
Is the inspection result normal?
YES >>
GO TO 3.
NO >>
Replace wiring harness.
PERFORM CONFIGURATION
1. 1. Perform configuration for air bag diagnosis sensor unit. Refer to Work Procedure.
  2. Perform DTC confirmation procedure. Refer to DTC Description.
Is DTC detected?
YES>>
GO TO 4.
NO>>
Inspection End.
REPLACE AIR BAG DIAGNOSIS SENSOR UNIT
1. 1. Replace air bag diagnosis sensor unit. Refer to Removal and Installation.
  2. Perform DTC confirmation procedure. Refer to DTC Description.
Is DTC detected?
YES >>
GO TO 1.
NO >>
Inspection End.

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