Nissan Sentra B18 (2020-2025) Service Manual / Restraints / Srs Air Bag Control System :: Dtc/circuit Diagnosis / Air Bag (air Bag Diagnosis Sensor Unit) / B1000-49 Air Bag Diagnosis Sensor Unit

Nissan Sentra B18 (2020-2025) Service Manual: B1000-49 Air Bag Diagnosis Sensor Unit

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen items (Trouble diagnosis content)	DTC Detection Condition
B1000-49	Air bag diagnosis sensor unit (Air bag diagnosis sensor unit)	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	—
		Threshold	Air bag diagnosis sensor unit is malfunctioning
		Diagnosis delay time	2 seconds or more.

POSSIBLE CAUSE

Malfunction in air bag diagnosis sensor unit

FAIL-SAFE

—

Confirmation Procedure

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 malfunctioning part detected?
YES >>
Refer to DTC Diagnosis Procedure.
NO >>
To check malfunction symptom before repair: Refer to Intermittent Incident.
NO >>
Confirmation after repair: Inspection End.

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.

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 Confirmation Procedure.
Is DTC detected?
YES>>
Check Intermittent incident. Refer to Intermittent Incident.
NO>>
Inspection End.

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