Nissan Sentra B18 (2020-2025) Service Manual / Restraints / Srs Air Bag Control System :: Dtc/circuit Diagnosis / Air Bag (air Bag Diagnosis Sensor Unit) / B0091 Front Door Satellite Sensor

Nissan Sentra B18 (2020-2025) Service Manual: B0091 Front Door Satellite Sensor

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen items (Trouble diagnosis content)	DTC detecting condition
B0091–11	DOOR SATEL SENS LH (Left side Restraints Sensor 1)	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	Front door satellite sensor LH signal
		Threshold	Front door satellite sensor LH is shorted to ground
		Diagnosis delay time	2 seconds or more.
B0091–12	DOOR SATEL SENS LH (Left side Restraints Sensor 1)	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	Front door satellite sensor LH signal
		Threshold	Front door satellite sensor LH circuit is shorted to power supply circuit
		Diagnosis delay time	2 seconds or more.
B0091–25	DOOR SATEL SENS LH (Left side Restraints Sensor 1)	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	Front door satellite sensor LH signal
		Threshold	Diagnosis malfunction of front door satellite sensor LH
		Diagnosis delay time	2 seconds or more.
B0091–28	DOOR SATEL SENS LH (Left side Restraints Sensor 1)	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	Front door satellite sensor LH signal
		Threshold	Offset malfunction of front door satellite sensor LH
		Diagnosis delay time	2 seconds or more.
B0091–55	DOOR SATEL SENS LH (Left side Restraints Sensor 1)	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	Front door satellite sensor 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.
B0091–81	DOOR SATEL SENS LH (Left side Restraints Sensor 1)	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	Front door satellite sensor LH signal
		Threshold	Communication malfunction of front door satellite sensor LH
		Diagnosis delay time	2 seconds or more.
B0091–86	DOOR SATEL SENS LH (Left side Restraints Sensor 1)	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	Front door satellite sensor LH signal
		Threshold	Front door satellite sensor LH is out of specified range
		Diagnosis delay time	2 seconds or more.
B0091–88	DOOR SATEL SENS LH (Left side Restraints Sensor 1)	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	Front door satellite sensor LH signal
		Threshold	Front door satellite sensor LH circuit is open
		Diagnosis delay time	2 seconds or more.
B0091–93	DOOR SATEL SENS LH (Left side Restraints Sensor 1)	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	Front door satellite sensor LH signal
		Threshold	Reset malfunction of front door satellite sensor LH
		Diagnosis delay time	2 seconds or more.

POSSIBLE CAUSE

B0091–11

Connection malfunction or short circuit to ground of harness and connector
Internal malfunction of front door satellite sensor LH
Internal malfunction of air bag diagnosis sensor unit

B0091–12

Connection malfunction or short circuit to power supply of harness and connector
Internal malfunction of front door satellite sensor LH
Internal malfunction of air bag diagnosis sensor unit

B0091–25

Internal malfunction of front door satellite sensor LH
Internal malfunction of air bag diagnosis sensor unit

B0091–28

Internal malfunction of front door satellite sensor LH
Internal malfunction of air bag diagnosis sensor unit

B0091–55

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

B0091–81

Connection malfunction of harness and connector
Internal malfunction of front door satellite sensor LH
Internal malfunction of air bag diagnosis sensor unit

B0091–86

Air bag diagnosis sensor unit and front door satellite sensor LH is different from the part specified

B0091–88

Connection malfunction or open circuit of harness and connector
Internal malfunction of front door satellite sensor LH
Internal malfunction of air bag diagnosis sensor unit

B0091–93

Connection malfunction of harness and connector
Internal malfunction of front door satellite sensor LH
Internal malfunction of 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.

B0091–55

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 B0091–55

CHECK DTC
1. Perform each inspection according to the displayed DTC.
Which DTC is displayed?
[B0091–86] >>
GO TO 4.
Other than the above >>
GO TO 2.
CHECK HARNESS CONNECTOR
1. Check the harness connector for disconnection, looseness or damage.
Is the inspection result normal?
YES>>
GO TO 3.
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 4.
NO>>
Replace malfunctioning harness and connector.
REPLACE FRONT DOOR SATELLITE SENSOR LH
1. 1. Replace the front door satellite sensor LH. Refer to Removal and Installation - Front Door Satellite Sensor.
  2. Perform DTC confirmation procedure. Refer to DTC Confirmation Procedure.
Is DTC detected?
YES>>
GO TO 5.
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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