Nissan Sentra B18 (2020-2025) Service Manual: Diagnosis Procedure
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CHECK INPUT 1 - 6 CIRCUIT FOR OPEN
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-
Ignition switch OFF.
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Disconnect BCM connector and combination switch connector.
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Check continuity between BCM harness connector and combination switch harness connector.
Combination switch signal
BCM
Combination switch
Continuity
Connector
Terminal
Connector
Terminal
INPUT 1
M83
67
M28
1
Yes
INPUT 2
68
3
INPUT 3
69
4
INPUT 4
70
6
INPUT 5
71
8
INPUT 6
72
13
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Is the inspection result normal?
YES >>GO TO 2.
NO >>Repair harness or connectors.
-
-
CHECK INPUT 1 - 6 CIRCUIT FOR SHORT
-
Check for continuity between BCM harness connector and ground.
Combination switch signal
BCM
—
Continuity
Connector
Terminal
INPUT 1
M83
67
Ground
No
INPUT 2
68
INPUT 3
69
INPUT 4
70
INPUT 5
71
INPUT 6
72
Is the inspection result normal?
YES >>GO TO 3.
NO >>Repair harness or connectors.
-
-
CHECK COMBINATION SWITCH INPUT VOLTAGE
-
-
Connect BCM connector.
-
Ignition switch ON.
-
Check voltage between BCM harness connector and ground.
Combination switch signal
(+)
(−)
Voltage
(Approx.)
BCM
Connector
Terminal
INPUT 1
M83
67
Ground
Refer to Reference Value.
INPUT 2
68
INPUT 3
69
INPUT 4
70
INPUT 5
71
INPUT 6
72
-
Is the inspection result normal?
YES >>Replace combination switch. Refer to Removal and Installation.
NO >>Replace BCM. Refer to Removal and Installation.
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Other materials:
Diagnosis Procedure
Diagnosis Procedure
Vehicle conditions:
Seat belt indicator lamp is ON, passenger air bag
indicator lamp is ON or OFF.
Passenger seat is unoccupied.
Driver seat belt is buckled.
Passenger seat belt buckle harness and front seat
...
Av Control Unit
Exploded View
Exploded View
1.
AV control unit bracket
(LH)
2.
AV control unit
3.
...
Charging system
System Diagram
System Description
The generator provides DC voltage to operate the vehicle's electrical system
and to keep the battery charged.
The voltage output is controlled by the IC regulator.
Component Description
...
