Nissan Sentra B18 (2020-2025) Service Manual: B2a1a Rear Camera

Nissan Sentra B18 (2020-2025) Service Manual / Driver Information & Multimedia / Audio, Visual & Navigation System :: Intelligent Around View Monitor System / Dtc/circuit Diagnosis / B2a1a Rear Camera

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
B2A1A-38	Rear camera (Rear camera image signal)	Diagnosis condition	Ignition switch ON
		Signal (terminal)	RV video signal circuit (terminal 20)
		Threshold	RV video signal circuit is open or short
		Diagnosis delay time	—

POSSIBLE CAUSE

RV video signal circuit
Rear camera
Around view monitor control unit

FAIL-SAFE

Camera image may not be displayed.
MOD (Moving Object Detection) function is stopped.

Confirmation Procedure

Confirmation Procedure

PERFORM DTC CONFIRMATION PROCEDURE
1. CONSULT
  1. Ignition switch ON.
  2. Ignition switch OFF and wait at least 30 seconds.
  3. Ignition switch ON and wait at least 30 seconds or more.
  4. Select “Self Diagnostic Result” mode of “AVM”.
  5. Check DTC.
Is DTC B2A1A–38 detected?
YES >>
Proceed 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

CHECK CONTINUITY OF REAR CAMERA POWER SUPPLY AND GROUND CIRCUIT

Ignition switch OFF.
Disconnect around view monitor control unit connector and rear camera connector.

Check continuity between around view monitor control unit connector and rear camera connector.

Around view monitor control unit		Rear camera		Continuity
Connector	Terminal	Connector	Terminal	Continuity
B72	17	B69	7	Yes
B72	18	B69	8	Yes

Check continuity between around view monitor control unit connector and ground.

Around view monitor control unit		—	Continuity
Connector	Terminal	—	Continuity
B72	18	Ground	No

Is the inspection result normal?

YES >>

GO TO 2.

NO >>

Repair harness or connector.

CHECK VOLTAGE OF REAR CAMERA POWER SUPPLY

Connect around view monitor control unit connector and rear camera connector.
Ignition switch ON.

Check voltage between around view monitor control unit connector and ground.

(+)	(−)	Condition	Voltage (Approx.)
B72	18	Ground	“CAMERA” switch is ON or shift position is “R”.	6.0 V

(+)

(−)

Condition

Voltage

(Approx.)

Around view monitor control unit

Connector

Terminal

B72

Ground

“CAMERA” switch is ON or shift position is “R”.

6.0 V

Is inspection result normal?

YES >>

GO TO 3.

NO >>

Replace around view monitor control unit. Refer to Removal and Installation.

CHECK CONTINUITY OF REAR CAMERA IMAGE SIGNAL CIRCUIT

Ignition switch OFF.
Disconnect around view monitor control unit connector and rear camera connector.

Check continuity between around view monitor control unit connector and rear camera connector.

Around view monitor control unit		Rear camera		Continuity
Connector	Terminal	Connector	Terminal	Continuity
B72	19	B69	1	Yes
B72	20	B69	5	Yes

Check continuity between around view monitor control unit harness connector and ground.

Around view monitor control unit		—	Continuity
Connector	Terminal	—	Continuity
B72	20	Ground	No

Is inspection result normal?

YES >>

GO TO 4.

NO >>

Repair harness or connector.

CHECK REAR CAMERA IMAGE SIGNAL

Connect around view monitor control unit connector and rear camera connector.
Ignition switch ON.

Check signal between around view monitor control unit connector.

Around view monitor control unit			Condition
Connector	Terminals
Connector	(+)	(—)
B72	20	19	“CAMERA” switch is ON or shift position is “R”.

Is inspection result normal?

YES >>

Replace around view monitor control unit. Refer to Removal and Installation.

NO >>

Replace rear camera. Refer to Removal and Installation.

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