Nissan Pathfinder: Dtc/circuit Diagnosis (B100e Knee Air Bag Module Rh ... B142a Ignition Voltage)

Nissan Pathfinder (R53) 2022-2025 Service Manual / Restraints :: Srs Air Bag Control System / Dtc/circuit Diagnosis / Dtc/circuit Diagnosis (B100e Knee Air Bag Module Rh ... B142a Ignition Voltage)

B100e Knee Air Bag Module Rh
B1029 Seat Belt Pre-Tensioner
B1036 Ignition Voltage
B1040-22 Vehicle Speed
B1041-82 Vehicle Speed Signal
B107b-55 Ecu Setting
B12b5-97 Frontal Collision
B12ba-97 Air Bag Disposal Deployment
B1428 Seat Belt Buckle Switch Lh
B142a Ignition Voltage

B100e Knee Air Bag Module Rh Nissan Pathfinder Fifth generation

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen items (Trouble diagnosis content)	DTC Detection Condition
B100E-1A	Knee air bag module RH (Knee air bag module right hand)	Diagnosis condition	Ignition switch ON.
		Signal (terminal)	Knee air bag module RH signal
		Threshold	Knee air bag module RH circuits are shorted to each other
		Diagnosis delay time	2 seconds or more.
B100E-1B	Knee air bag module RH (Knee air bag module right hand)	Diagnosis condition	Ignition switch ON.
		Signal (terminal)	Knee air bag module RH signal
		Threshold	Knee air bag module RH circuit resistance is above threshold
		Diagnosis delay time	2 seconds or more.
B100E-09	Knee air bag module RH (Knee air bag module right hand)	Diagnosis condition	Ignition switch ON.
		Signal (terminal)	Knee air bag module RH signal
		Threshold	Knee air bag module RH circuit is shorted to other
		Diagnosis delay time	2 seconds or more.
B100E-11	Knee air bag module RH (Knee air bag module right hand)	Diagnosis condition	Ignition switch ON.
		Signal (terminal)	Knee air bag module RH signal
		Threshold	Knee air bag module RH circuit is shorted to ground
		Diagnosis delay time	2 seconds or more.
B100E-12	Knee air bag module RH (Knee air bag module right hand)	Diagnosis condition	Ignition switch ON.
		Signal (terminal)	Knee air bag module RH signal
		Threshold	Knee air bag module RH circuit is shorted to power supply circuit
		Diagnosis delay time	2 seconds or more.
B100E-13	Knee air bag module RH (Knee air bag module right hand)	Diagnosis condition	Ignition switch ON.
		Signal (terminal)	Knee air bag module RH signal
		Threshold	Knee air bag module RH circuit is open
		Diagnosis delay time	2 seconds or more.
B100E-55	Knee air bag module RH (Knee air bag module right hand)	Diagnosis condition	Ignition switch ON.
		Signal (terminal)	Knee air bag module RH signal
		Threshold	When a mismatch is detected between in the configuration data stored in the air bag diagnosis sensor unit and Nissan Pathfinder vehicle specification.
		Diagnosis delay time	2 seconds or more.

POSSIBLE CAUSE

Connection malfunction or short circuit of harness and connector
Internal malfunction of knee air bag module RH
Internal malfunction of air bag diagnosis sensor unit

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

CHECK SELF-DIAG RESULT

CONSULT

Ignition switch ON.
Select “Self Diagnostic Result” mode of “AIR BAG”.

Is malfunctioning part detected?

YES>>

Refer to Diagnosis Procedure.

NO>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO>>

Confirmation after repair: Inspection End.

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 unspecified tester or other measuring device.

CHECK HARNESS CONNECTOR

Check the harness connector.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Replace harness connector.

CHECK WIRING HARNESS

Check the wiring harness externals.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Replace wiring harness.

REPLACE KNEE AIR BAG MODULE RH

Replace knee air bag module RH. Refer to Removal and Installation.
Perform DTC confirmation procedure. Refer to DTC Description.

Is DTC detected?

YES>>

GO TO 4.

NO>>

Inspection End.

REPLACE AIR BAG DIAGNOSIS SENSOR UNIT

Replace air bag diagnosis sensor unit. Refer to Removal and Installation.
Perform DTC confirmation procedure. Refer to DTC Description.

Is DTC detected?

YES>>

GO TO 1.

NO>>

Inspection End.

B1029 Seat Belt Pre-Tensioner Nissan Pathfinder 2025

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen items (Trouble diagnosis content)	DTC detecting condition
B1029-09	PRE-TEN FRONT LH [SHORT]	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	Front LH seat belt pre-tensioner (shoulder belt) signal
		Threshold	Front LH seat belt pre-tensioner (shoulder belt) circuit is shorted to other
		Diagnosis delay time	2 seconds or more.
B1029-11	PRE-TEN FRONT LH [GND-SHORT]	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	Front LH seat belt pre-tensioner (shoulder belt) signal
		Threshold	Front LH seat belt pre-tensioner (shoulder belt) circuit is shorted to ground
		Diagnosis delay time	2 seconds or more.
B1029-12	PRE-TEN FRONT LH [VB-SHORT]	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	Front LH seat belt pre-tensioner (shoulder belt) signal
		Threshold	Front LH seat belt pre-tensioner (shoulder belt) circuit is shorted to power supply circuit
		Diagnosis delay time	2 seconds or more.
B1029-13	PRE-TEN FRONT LH [OPEN]	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	Front LH seat belt pre-tensioner (shoulder belt) signal
		Threshold	Front LH seat belt pre-tensioner (shoulder belt) circuit is open
		Diagnosis delay time	2 seconds or more.
B1029-1A	PRE-TEN FRONT LH [SHORT]	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	Front LH seat belt pre-tensioner (shoulder belt) signal
		Threshold	Front LH seat belt pre-tensioner (shoulder belt) circuit is shorted to other
		Diagnosis delay time	2 seconds or more.
B1029-1B	PRE-TEN FRONT LH [ABOVE]	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	Front LH seat belt pre-tensioner (shoulder belt) signal
		Threshold	Front LH seat belt pre-tensioner (shoulder belt) circuit resistance is above threshold
		Diagnosis delay time	2 seconds or more.
B1029-55	PRE-TEN FRONT LH [CONFIGURATION]	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	Front LH seat belt pre-tensioner (shoulder belt) signal
		Threshold	When a mismatch is detected between in the configuration data stored in the air bag diagnosis sensor unit and Nissan Pathfinder vehicle specification.
		Diagnosis delay time	2 seconds or more.

POSSIBLE CAUSE

[SHORT]

Connection malfunction or short circuit of harness and connector
Internal malfunction of front LH seat belt pre-tensioner (shoulder belt)
Internal malfunction of air bag diagnosis sensor unit

[GND-SHORT]

Connection malfunction or short circuit to ground of harness and connector
Internal malfunction of front LH seat belt pre-tensioner (shoulder belt)
Internal malfunction of air bag diagnosis sensor unit

[VB-SHORT]

Connection malfunction or short circuit to power supply of harness and connector
Internal malfunction of front LH seat belt pre-tensioner (shoulder belt)
Internal malfunction of air bag diagnosis sensor unit

[OPEN]

Connection malfunction or open circuit of harness and connector
Internal malfunction of front LH seat belt pre-tensioner (shoulder belt)
Internal malfunction of air bag diagnosis sensor unit

[ABOVE]

Connection malfunction of harness and connector
Internal malfunction of front LH seat belt pre-tensioner (shoulder belt)
Internal malfunction of air bag diagnosis sensor unit

[CONFIGURATION]

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

CONSULT

Ignition switch ON.
Select "Self Diagnostic Result" mode of "AIR BAG".
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.

Diagnosis Procedure

WARNING:

B1029-55

CHECK HARNESS CONNECTOR

Check the harness connector.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Replace harness connector.

CHECK WIRING HARNESS

Check the wiring harness externals.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Replace wiring harness.

PERFORM CONFIGURATION

Perform configuration for air bag diagnosis sensor unit. Refer to Work Procedure.
Perform DTC confirmation procedure. Refer to DTC Description.

Is DTC detected?

YES>>

GO TO 4.

NO>>

Inspection End.

REPLACE AIR BAG DIAGNOSIS SENSOR UNIT

Replace air bag diagnosis sensor unit. Refer to Removal and Installation.
Perform DTC confirmation procedure. Refer to DTC Description.

Is DTC detected?

YES>>

GO TO 1.

NO>>

Inspection End.

EXCEPT B1029-55

CHECK HARNESS CONNECTOR

Check the harness connector.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Replace harness connector.

CHECK WIRING HARNESS

Check the wiring harness externals.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Replace wiring harness.

REPLACE FRONT LH SEAT BELT PRE-TENSIONER (SHOULDER BELT)

Replace front LH seat belt pre-tensioner (shoulder belt). Refer to Removal and Installation.
Perform DTC confirmation procedure. Refer to DTC Description.

Is DTC detected?

YES>>

GO TO 4.

NO>>

Inspection End.

REPLACE AIR BAG DIAGNOSIS SENSOR UNIT

Replace air bag diagnosis sensor unit. Refer to Removal and Installation.
Perform DTC confirmation procedure. Refer to DTC Description.

Is DTC detected?

YES>>

GO TO 1.

NO>>

Inspection End.

B1036 Ignition Voltage Nissan Pathfinder R53

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen items (Trouble diagnosis content)	DTC Detection Condition
B1036-16	Ignition voltage (Ignition voltage)	Diagnosis condition	Ignition switch ON.
		Signal (terminal)	Ignition low voltage signal
		Threshold	Power supply malfunction (low voltage) of air bag diagnosis sensor unit
		Diagnosis delay time	10 seconds or more.
B1036-17	Ignition voltage (Ignition voltage)	Diagnosis condition	Ignition switch ON.
		Signal (terminal)	Ignition low voltage signal
		Threshold	Power supply malfunction (high voltage) of air bag diagnosis sensor unit
		Diagnosis delay time	10 seconds or more.

POSSIBLE CAUSE

Malfunction of battery voltage (9 V or less)
Connection malfunction of harness or connector
Internal malfunction of air bag diagnosis sensor unit

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

CHECK SELF-DIAG RESULT

CONSULT

Ignition switch ON and wait for 10 seconds or more.
Select “Self Diagnostic Result” mode of “AIR BAG”.

Is malfunctioning part detected?

YES>>

Refer to Diagnosis Procedure.

NO>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO>>

Confirmation after repair: Inspection End.

Diagnosis Procedure

WARNING:

CHECK BATTERY VOLTAGE

Check battery voltage. Refer to Work Flow.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace the malfunctioning parts.

CHECK HARNESS CONNECTOR

Check the harness connector.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Replace harness connectors.

CHECK WIRING HARNESS

Check the wiring harness externals.

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Replace wiring harness.

REPLACE AIR BAG DIAGNOSIS SENSOR UNIT

Replace air bag diagnosis sensor unit. Refer to Removal and Installation.
Perform DTC confirmation procedure. Refer to DTC Description.

Is DTC detected?

YES>>

GO TO 1.

NO>>

Inspection End.

B1040-22 Vehicle Speed Nissan Pathfinder SUV

DTC Description

DTC DETECTION LOGIC

NOTE:

This DTC may be detected when drive the Nissan Pathfinder vehicle at vehicle speed of 186 MPH (300 km/h) or more.

DTC No.	CONSULT screen items (Trouble diagnosis content)	DTC Detection Condition
B1040-22	Nissan Pathfinder Vehicle speed (Vehicle speed)	Diagnosis condition	Ignition switch ON.
		Signal (terminal)	Nissan Pathfinder Vehicle speed signal
		Threshold	186 MPH (300 km/h) or more
		Diagnosis delay time	2 seconds or more.

POSSIBLE CAUSE

Drive the vehicle at vehicle speed of 186 MPH (300 km/h) or more.
ECM
Air bag diagnosis sensor unit

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

CHECK SELF-DIAG RESULT

CONSULT

Ignition switch ON.
Select “Self Diagnostic Result” mode of “AIR BAG”.

Is malfunctioning part detected?

YES>>

Refer to Diagnosis Procedure.

NO>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO>>

Confirmation after repair: Inspection End.

Diagnosis Procedure

WARNING:

REPLACE ECM

Replace ECM. Refer to Removal and Installation.
Perform DTC confirmation procedure. Refer to DTC Description.

Is DTC detected?

YES>>

Replace air bag diagnosis sensor unit. Refer to Removal and Installation.

NO>>

Inspection End.

B1041-82 Vehicle Speed Signal Nissan Pathfinder 2025

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen items (Trouble diagnosis content)	DTC Detection Condition
B1041-82	Nissan Pathfinder Vehicle speed signal (Vehicle speed signal)	Diagnosis condition	Ignition switch ON.
		Signal (terminal)	CAN communication signal
		Threshold	Error signal that is received from ABS actuator and electric unit (control unit)
		Diagnosis delay time	2 seconds or more.

POSSIBLE CAUSE

ABS actuator and electric unit (control unit)
Air bag diagnosis sensor unit

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

CHECK DTC PRIORITY

If DTC B1041-82 is displayed with Network-DTC, first perform the trouble diagnosis for Network-DTC.

Is applicable DTC detected?

YES>>

Perform diagnosis of applicable. Refer to DTC Index.

NO>>

GO TO 2.

CHECK SELF-DIAG RESULT

CONSULT

Ignition switch ON.
Select “Self Diagnostic Result” mode of “AIR BAG”.

Is malfunctioning part detected?

YES>>

Refer to Diagnosis Procedure.

NO>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO>>

Confirmation after repair: Inspection End.

Diagnosis Procedure

WARNING:

CHECK DTC PRIORITY

If DTC B1041-82 is displayed with Network-DTC, first perform the trouble diagnosis for Network-DTC.

Is applicable DTC detected?

YES>>

Perform diagnosis of applicable. Refer to DTC Index.

NO>>

GO TO 2.

CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS RESULTS

Check if any DTC is detected in “Self Diagnostic Result” of “ABS”.

Is any DTC detected?

YES>>

Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to DTC Index.

NO>>

Replace air bag diagnosis sensor unit. Refer to Removal and Installation.

B107b-55 Ecu Setting Nissan Pathfinder

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen items (Trouble diagnosis content)	DTC Detection Condition
B107B-55	ECU setting (Electronic control unit setting)	Diagnosis condition	Ignition switch ON.
		Signal (terminal)	—
		Threshold	When no data are stored in the air bag diagnosis sensor unit or when errors are detected in the configuration data stored in the air bag diagnosis sensor unit.
		Diagnosis delay time	2 seconds or more.

POSSIBLE CAUSE

Incomplete or mistake of configuration for air bag diagnosis sensor unit

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

CHECK SELF-DIAG RESULT

CONSULT

Ignition switch ON.
Select “Self Diagnostic Result” mode of “AIR BAG”.

Is malfunctioning part detected?

YES>>

Refer to Diagnosis Procedure.

NO>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO>>

Confirmation after repair: Inspection End.

Diagnosis Procedure

PERFORM CONFIGURATION

Perform configuration for air bag diagnosis sensor unit.

Refer to DTC Description.

B12b5-97 Frontal Collision Nissan Pathfinder SUV

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen items (Trouble diagnosis content)	DTC Detection Condition
B12B5-97	Frontal collision (Frontal collision)	Diagnosis condition	Ignition switch ON.
		Signal (terminal)	Collision signal
		Threshold	Frontal collision detected
		Diagnosis delay time	2 seconds or more.

POSSIBLE CAUSE

Frontal collision

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

CHECK SELF-DIAG RESULT

CONSULT

Ignition switch ON.
Perform “Self Diagnostic Result” mode of “AIR BAG”.

Is malfunctioning part detected?

YES>>

Refer to Diagnosis Procedure.

NO>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO>>

Confirmation after repair: Inspection End.

Diagnosis Procedure

WARNING:

PERFORM COLLISION DIAGNOSIS

Perform collision diagnosis. Refer to For Frontal Collision..

GO TO 2.

REPLACE AIR BAG DIAGNOSIS SENSOR UNIT

When DTC B12B5-97 is detected, replace air bag diagnosis sensor unit.

Replace air bag diagnosis sensor unit. Refer to Removal and Installation.

B12ba-97 Air Bag Disposal Deployment Nissan Pathfinder 2025

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen items (Trouble diagnosis content)	DTC Detection Condition
B12BA-97	Air bag disposal completion (Air bag disposal completion)	Diagnosis condition	Ignition switch ON.
		Signal (terminal)	Disposal deployment detection signal
		Threshold	Reuse of air bag diagnosis sensor unit
		Diagnosis delay time	2 seconds or more.

POSSIBLE CAUSE

Reuse of air bag diagnosis sensor unit after disposal deployment

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

CHECK SELF-DIAG RESULT

CONSULT

Ignition switch ON.
Select “Self Diagnostic Result” mode of “AIR BAG”.

Is malfunctioning part detected?

YES>>

Refer to Diagnosis Procedure.

NO>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO>>

Confirmation after repair: Inspection.

Diagnosis Procedure

WARNING:

REPLACE AIR BAG DIAGNOSIS SENSOR UNIT

Replace air bag diagnosis sensor unit. Refer to Removal and Installation.

Inspection End.

B1428 Seat Belt Buckle Switch Lh Nissan Pathfinder

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen items (Trouble diagnosis content)	DTC detecting condition
B1428	BUCKLE SW LH [OPEN]	13	Diagnosis condition	Ignition switch ON.
			Signal (terminal)	Seat belt buckle switch LH circuit is open. (terminal 17).
			Threshold	—
			Diagnosis delay time	—
	BUCKLE SW LH [VB-SHORT]	12	Diagnosis condition	Ignition switch ON.
			Signal (terminal)	Seat belt buckle switch LH circuit is shorted to power. (terminal 17).
			Threshold	—
			Diagnosis delay time	—
	BUCKLE SW LH [GND-SHORT]	11	Diagnosis condition	Ignition switch ON.
			Signal (terminal)	Seat belt buckle switch LH circuit is shorted to ground (terminal 17).
			Threshold	—
			Diagnosis delay time	—
	BUCKLE SW LH [UNDEFINED]	00	Diagnosis condition	Ignition switch ON.
			Signal (terminal)	Seat belt buckle switch LH (terminal 17).
			Threshold	—
			Diagnosis delay time	—

POSSIBLE CAUSE

[OPEN]

Connection malfunction or open circuit of harness and connector
Internal malfunction of seat belt buckle switch LH

[VB-SHORT]

Connection malfunction or short circuit to power supply of harness and connector
Internal malfunction of seat belt buckle switch LH
Internal malfunction of diagnosis sensor unit

[GND-SHORT]

Connection malfunction or short circuit to ground of harness and connector
Internal malfunction of seat belt buckle switch LH
Internal malfunction of diagnosis sensor unit

[UNDEFINED]

Connection malfunction or open circuit of harness and connector
Internal malfunction of seat belt buckle switch LH
Internal malfunction of diagnosis sensor unit

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE (With CONSULT)

CHECK SELF-DIAG RESULT

CONSULT

Ignition switch ON.
Check for DTC.

Is the DTC detected?

YES>>

Refer to Diagnosis Procedure.

YES>>

GO TO 2.

NO>>

Inspection End.

ERASE SELF-DIAG RESULT

CONSULT

Erase the DTC.

Can the DTC be erased?

YES>>

Inspection End.

NO>>

Refer to Diagnosis Procedure.

DTC CONFIRMATION PROCEDURE (Without CONSULT)

CHECK SELF-DIAG RESULT

Ignition switch ON.
Check the air bag warning lamp status. Refer to Trouble Diagnosis without CONSULT.

NOTE:

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

Is the DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO>>

Inspection End.

Diagnosis Procedure

WARNING:

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

Never use unspecified tester or other measuring device.

HARNESS CONNECTOR

Visually inspect all applicable harness connectors for the following:

Visible damage to connector or terminal
Loose terminal
Poor connection

NOTE:
All harness connectors should be inspected from the air bag diagnosis unit to the end component (including any in-line connectors).

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Perform one of the following repairs:

Visible damage: Replace the harness.
Loose terminal: Secure the terminal.
Poor connection: Secure the connection.

CONFIRM DTC

CONSULT

Reconnect all harness connectors.
Ignition switch ON.
Check for DTC.

Is DTC still current?

YES>>

GO TO 3.

NO>>

Refer to Intermittent Incident.

WIRING HARNESS

Check the wiring harness for visible damage.

NOTE:

The entire wiring harness should be inspected from the air bag diagnosis sensor unit to the end component (including any in-line connectors).

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Replace the harness.

CONFIRM DTC

CONSULT

Reconnect all harness connectors.
Ignition switch ON.
Check for DTC.

Is DTC still current?

YES>>

GO TO 5.

NO>>

Refer to Intermittent Incident.

SEAT BELT BUCKLE SWITCH LH

CONSULT

Replace the seat belt buckle switch LH. Refer to Removal and Installation.
Ignition switch ON.
Check for DTC.

Is DTC still current?

YES>>

GO TO 6.

NO>>

Clear DTC. Inspection End.

AIR BAG DIAGNOSIS SENSOR UNIT

CONSULT

Replace the air bag diagnosis sensor unit. Refer to Removal and Installation.
Ignition switch ON.
Check for DTC.

Is DTC still current?

YES>>

GO TO 7.

NO>>

Clear DTC. Inspection End.

RELATED HARNESS

Replace the related harness.

Inspection End.

B142a Ignition Voltage Nissan Pathfinder 2025

DTC Description

DESCRIPTION

DTC DETECTION LOGIC

DTC No.	CONSULT screen items (Trouble diagnosis content)	DTC detecting condition
B142A	IGNITION VOLTAGE [VB-LOW]	16	Diagnosis condition	Ignition switch ON.
			Signal (terminal)	Ignition voltage low at air bag diagnosis sensor unit.
			Threshold	—
			Diagnosis delay time	—
	IGNITION VOLTAGE [VB-HIGH]	17	Diagnosis condition	Ignition switch ON.
			Signal (terminal)	Ignition voltage high at air bag diagnosis sensor unit.
			Threshold	—
			Diagnosis delay time	—

POSSIBLE CAUSE

[VB-LOW]

Malfunction of battery voltage (low voltage)
Connection malfunction of harness or connector
Internal malfunction of air bag diagnosis sensor unit

[VB-HIGH]

Malfunction of battery voltage (high voltage)
Connection malfunction of harness or connector
Internal malfunction of air bag diagnosis sensor unit

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE (With CONSULT)

CHECK SELF-DIAG RESULT

CONSULT

Ignition switch ON.
Check for DTC.

Is the DTC detected?

YES>>

Refer to Diagnosis Procedure.

YES>>

GO TO 2.

NO>>

Inspection End.

ERASE SELF-DIAG RESULT

CONSULT

Erase the DTC.

Can the DTC be erased?

YES>>

Inspection End.

NO>>

Refer to Diagnosis Procedure.

DTC CONFIRMATION PROCEDURE (Without CONSULT)

CHECK SELF-DIAG RESULT

Ignition switch ON.
Check the air bag warning lamp status. Refer to Trouble Diagnosis without CONSULT.

NOTE:

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

Is the DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO>>

Inspection End.

Diagnosis Procedure

WARNING:

HARNESS CONNECTOR

Visually inspect all applicable harness connectors for the following:

Visible damage to connector or terminal
Loose terminal
Poor connection

NOTE:
All harness connectors should be inspected from the air bag diagnosis unit to the end component (including any in-line connectors).