Nissan Sentra B18 (2020-2025) Service Manual: Driver Assistance Buzzer Circuit
Component Function Check
Component Function Check
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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
Diagnosis Procedure
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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.
-
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Brake Booster
Exploded View
Exploded View
1.
Brake booster
2.
Vacuum sensor
3.
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Front Auxiliary Input Jacks
Diagnosis Procedure
Diagnosis Procedure
AUX JACK
CHECK AUX JACK HARNESS CONTINUITY
Ignition switch OFF.
Disconnect AV control unit connector and front
auxiliary input j ...