Nissan Sentra B18 (2020-2025) Service Manual: Driver Assistance Buzzer Circuit
Component Function Check
-
CHECK DRIVER ASSISTANCE BUZZER
CONSULT-
Select “ADAS buzzer 2” in “Active Test” mode of “ICC/ADAS 2”.
-
Check that the function operates normally.
Is the inspection result normal?
YES >>Inspection End.
NO >>Refer to Diagnosis Procedure.
-
Diagnosis Procedure
-
CHECK DRIVER ASSISTANCE BUZZER POWER SUPPLY CIRCUIT
-
Turn ignition switch OFF.
-
Disconnect the driver assistance buzzer harness connector.
-
Turn ignition switch ON.
-
Check voltage between the driver assistance buzzer harness connector and ground.
Terminal
Voltage
(Approx.)
(+)
(−)
Driver assistance buzzer
Ground
Connector
Terminal
M149
1
Battery voltage
Is the inspection result normal?
YES >>GO TO 2.
NO >>Repair the driver assistance buzzer power supply circuit.
-
-
CHECK DRIVER ASSISTANCE BUZZER CONTROL CIRCUIT
-
Turn ignition switch OFF.
-
Disconnect the ADAS control unit 2 harness connector.
-
Check continuity between the ADAS control unit 2 harness connector and driver assistance buzzer harness connector.
ADAS control unit 2
Driver assistance buzzer
Continuity
Connector
Terminal
Connector
Terminal
M148
1
M149
1
Yes
-
Check continuity between the ADAS control unit 2 harness connector and ground.
ADAS control unit 2
Ground
Continuity
Connector
Terminal
M148
13
No
Is the inspection result normal?
YES >>Replace the driver assistance buzzer. Refer to Removal and Installation.
NO >>Repair the harness or connector.
-
Right/left Switching Signal Circuit
Diagnosis Procedure
Diagnosis Procedure
CHECK CONNECTOR
Turn the ignition switch OFF.
Check the terminals and connectors of
...
Other materials:
Wheel alignment
Inspection
PRELIMINARY INSPECTION
WARNING:
Always adjust the wheel alignment with the vehicle on a flat surface.
NOTE:
If the wheel alignment is out of specification, inspect and replace any
damaged or worn rear suspension parts
before making any adjustments.
Check and adjust the wheel ...
Component Parts
Component Parts Location
Component Parts Location
1.
Distance sensor
2.
TCM
3.
...
System
System Description
System Description
SYSTEM DIAGRAM
INPUT SIGNAL AND OUTPUT SIGNAL
Control unit
Signal status
ABS actuator and electric unit
...
