Nissan Sentra B18 (2020-2025) Service Manual: B273b Rear Sensor Power
Dtc Description
DTC Description
DTC DETECTION LOGIC
|
DTC No. |
CONSULT screen terms (Trouble diagnosis content) |
DTC detection condition |
||
|---|---|---|---|---|
|
B273B–11 |
REAR SENSOR POWER (Rear sensor power) |
— |
Diagnosis condition |
Ignition switch ON |
|
Signal (terminal) |
Rear sensor power supply (terminal 23) |
|||
|
Threshold |
Rear sensor power supply is short to ground |
|||
|
Diagnosis delay time |
4 seconds or more |
|||
|
B273B–12 |
Diagnosis condition |
Ignition switch ON |
||
|
Signal (terminal) |
Rear sensor power supply (terminal 23) |
|||
|
Threshold |
Rear sensor power supply is short to voltage |
|||
|
Diagnosis delay time |
4 seconds or more |
|||
|
B273B–87 |
Diagnosis condition |
Ignition switch ON |
||
|
Signal (terminal) |
Rear sensor power supply (terminal 23) |
|||
|
Threshold |
Connection error is detected between sonar control unit and rear sonar sensors |
|||
|
Diagnosis delay time |
4 seconds or more |
|||
POSSIBLE CAUSE
-
Harness or connectors
-
Sonar control unit
FAIL-SAFE
Obstacle detection function is deactivated
Dtc Confirmation Procedure
DTC Confirmation Procedure
-
DTC CONFIRMATION PROCEDURE
-
CONSULT-
Ignition switch ON.
-
Ignition switch OFF and wait at least 30 seconds.
-
Ignition switch ON and wait at least 2 seconds or more.
-
Select “Self Diagnostic Result” mode of “SONAR”.
-
Is DTC B273B 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
-
DETERMINE MALFUNCTION TYPE
-
CONSULT-
Ignition switch ON.
-
Select “Self Diagnostic Result” mode of “SONAR”.
-
Check the DTC.
-
Is DTC B273B–11, 12 or 87 detected?
YES >>11 – GO TO 2.
YES >>12 – GO TO 3.
YES >>87 – GO TO 4.
NO >>Refer to Intermittent Incident.
-
-
CHECK REAR SENSOR POWER SUPPLY CIRCUIT FOR SHORT TO GROUND
-
-
Ignition switch OFF.
-
Disconnect sonar control unit and all rear sonar sensor connectors.
-
Check continuity between sonar control unit connector and ground.
Sonar control unit
—
Continuity
Connector
Terminal
B87
23
Ground
No
-
Is the inspection result normal?
YES >>Replace sonar control unit. Refer to Removal and Installation.
NO >>Repair or replace harness or connectors.
-
-
CHECK REAR SENSOR POWER SUPPLY FOR SHORT TO VOLTAGE
-
-
Ignition switch OFF.
-
Disconnect sonar control unit and all rear sonar sensor connectors.
-
Ignition switch ON.
-
Check the voltage between sonar control unit connector and ground.
(+)
(-)
Voltage
(Approx.)
Sonar control unit
Connector
Terminal
B87
23
Ground
0 V
-
Is the inspection result normal?
YES >>Replace sonar control unit. Refer to Removal and Installation.
NO >>Repair or replace harness or connectors.
-
-
CHECK SONAR CONTROL UNIT AND REAR SENSOR CONNECTORS
-
Check the terminals and connectors of each rear sonar sensor and sonar control unit for damage, bends and looseness.
Is the inspection result normal?
YES >>GO TO 5.
NO >>Repair or replace harness or connectors.
-
-
CHECK REAR SENSOR POWER SUPPLY CIRCUIT FOR OPEN
-
-
Ignition switch OFF.
-
Disconnect sonar control unit and all rear sonar sensor connectors.
-
Check continuity between sonar control unit connector and rear sonar sensor connectors.
Sonar control unit
Rear sonar sensors
Continuity
Connector
Terminal
Connector
Terminal
B87
23
B402 (rear sonar sensor LH outer)
3
Yes
B401 (rear sonar sensor RH outer)
B403 (rear sonar sensor LH inner)
B404 (rear sonar sensor RH inner)
-
Is the inspection result normal?
YES >>GO TO 6.
NO >>Repair or replace harness or connectors.
-
-
CHECK INTERMITTENT INCIDENT
-
Perform intermittent incident. Refer to Intermittent Incident.
Is the inspection result normal?
YES >>Replace sonar control unit. Refer to Removal and Installation.
NO >>Repair or replace the applicable malfunctioning components.
-
Other materials:
Diagnosis System (intelligent Key). Intelligent Key
Intelligent Key
Consult Function (intelligent Key Unit)
CONSULT Function (INTELLIGENT KEY UNIT)
SELF DIAGNOSTIC RESULT
Refer to DTC Index.
DATA MONITOR
Note:
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