Nissan Sentra B18 (2020-2025) Service Manual / Restraints / Srs Air Bag Control System :: Dtc/circuit Diagnosis / Air Bag (air Bag Diagnosis Sensor Unit) / B1030 Front Seat Belt Force Limiter

Nissan Sentra B18 (2020-2025) Service Manual: B1030 Front Seat Belt Force Limiter

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen items (Trouble diagnosis content)	DTC Detection Condition
B1030-09	Front seat belt force limiter LH (Front seat belt force limiter left hand)	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	Front seat belt force limiter LH signal
		Threshold	Front seat belt force limiter LH is shorted to other.
		Diagnosis delay time	2 seconds or more.
B1030-11	Front seat belt force limiter LH (Front seat belt force limiter left hand)	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	Front seat belt force limiter LH signal
		Threshold	Front seat belt force limiter LH is shorted to ground.
		Diagnosis delay time	2 seconds or more.
B1030-12	Front seat belt force limiter LH (Front seat belt force limiter left hand)	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	Front seat belt force limiter LH signal
		Threshold	Front seat belt force limiter LH is shorted to power supply circuit.
		Diagnosis delay time	2 seconds or more.
B1030-13	Front seat belt force limiter LH (Front seat belt force limiter left hand)	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	Front seat belt force limiter LH signal
		Threshold	Front seat belt force limiter LH is open.
		Diagnosis delay time	2 seconds or more.
B1030-1A	Front seat belt force limiter LH (Front seat belt force limiter left hand)	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	Front seat belt force limiter LH signal
		Threshold	Front seat belt force limiter LH circuits are shorted to each other.
		Diagnosis delay time	2 seconds or more.
B1030-1B	Front seat belt force limiter LH (Front seat belt force limiter left hand)	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	Front seat belt force limiter LH signal
		Threshold	Front seat belt force limiter LH circuit resistance is above threshold.
		Diagnosis delay time	2 seconds or more.
B1030-55	Front seat belt force limiter LH (Front seat belt force limiter left hand)	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	Front seat belt force limiter LH signal
		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	2 seconds or more.

POSSIBLE CAUSE

B1030-09

Connection malfunction or short circuit of harness and connector
Internal malfunction of front seat belt force limiter LH
Internal malfunction of air bag diagnosis sensor unit

B1030-11

Connection malfunction or short circuit to ground of harness and connector
Internal malfunction of front seat belt force limiter LH
Internal malfunction of air bag diagnosis sensor unit

B1030-12

Connection malfunction or short circuit to power supply of harness and connector
Internal malfunction of front seat belt force limiter LH
Internal malfunction of air bag diagnosis sensor unit

B1030-13

Connection malfunction or open circuit of harness and connector
Internal malfunction of front seat belt force limiter LH
Internal malfunction of air bag diagnosis sensor unit

B1030-1A

Connection malfunction or short circuit of harness and connector
Internal malfunction of front seat belt force limiter LH
Internal malfunction of air bag diagnosis sensor unit

B1030-1B

Connection malfunction or high resistance of circuit of harness and connector
Internal malfunction of front seat belt force limiter LH
Internal malfunction of air bag diagnosis sensor unit

B1030-55

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

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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.

B1030-55

CHECK HARNESS CONNECTOR
1. Check the harness connector for disconnection, looseness or damage.
Is the inspection result normal?
YES >>
GO TO 2.
NO >>
Damage: Replace malfunctioning harness and connector.
NO >>
Disconnection or looseness: Securely lock the connector.
CHECK WIRING HARNESS
1. Check the wiring harness externals.
Is the inspection result normal?
YES >>
GO TO 3.
NO >>
Replace malfunctioning harness and connector.
PERFORM CONFIGURATION
1. 1. Perform configuration for air bag diagnosis sensor unit. Refer to Work Procedure.
  2. Perform DTC confirmation procedure. Refer to DTC Confirmation Procedure.
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 Confirmation Procedure.
Is DTC detected?
YES >>
GO TO 1.
NO >>
Inspection End.

EXCEPT B1030-55

CHECK HARNESS CONNECTOR
1. Check the harness connector for disconnection, looseness or damage.
Is the inspection result normal?
YES >>
GO TO 2.
NO >>
Damage: Replace malfunctioning harness and connector.
NO >>
Disconnection or looseness: Securely lock the connector.
CHECK WIRING HARNESS
1. Check the wiring harness externals.
Is the inspection result normal?
YES >>
GO TO 3.
NO >>
Replace malfunctioning harness and connector.
REPLACE FRONT SEAT BELT FORCE LIMITER LH
1. 1. Replace front seat belt force limiter LH. Refer to Removal and Installation.
  2. Perform DTC confirmation procedure. Refer to DTC Confirmation Procedure.
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 Confirmation Procedure.
Is DTC detected?
YES >>
GO TO 1.
NO >>
Inspection End.

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