Nissan Sentra B18 (2020-2025) Service Manual: Trunk Lamp Switch
Component Function Check
Component Function Check
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CHECK FUNCTION
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CONSULT-
Select "Back door/trunk lid switch" in "Data Monitor" mode of "BCM(TRUNK)".
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Check that the function operates normally according to the following conditions:
Monitor item
Condition
Status
Back door/trunk lid switch
Trunk lid
Open
On
Closed
Off
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Is the inspection result normal?
YES >>Trunk room lamp switch is OK.
NO >>Refer to Diagnosis Procedure.
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Diagnosis Procedure
Diagnosis Procedure
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CHECK TRUNK ROOM LAMP SWITCH INPUT SIGNAL
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Ignition switch OFF.
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Check voltage between trunk lid opener assembly (ajar switch) harness connector and ground.
(+)
(–)
Voltage
(Approx.)
Trunk lid opener assembly (ajar switch)
Connector
Terminal
B59
1
Ground
Battery voltage
-
Is the inspection result normal?
YES >>GO TO 3.
NO >>GO TO 2.
-
-
CHECK TRUNK ROOM LAMP SWITCH CIRCUIT
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Disconnect BCM connector and trunk lid opener assembly (ajar switch) connector.
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Check continuity between BCM harness connector and trunk lid opener assembly (ajar switch) harness connector.
BCM
Trunk lid opener assembly (ajar switch)
Continuity
Connector
Terminal
Connector
Terminal
M85
96
B59
1
Yes
-
Check continuity between BCM harness connector and ground.
BCM
—
Continuity
Connector
Terminal
M85
96
Ground
No
-
Is the inspection result normal?
YES >>Replace BCM. Refer to Removal and Installation.
NO >>Repair or replace harness.
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-
CHECK TRUNK ROOM LAMP SWITCH GROUND CIRCUIT
-
-
Disconnect trunk lid opener assembly (ajar switch) connector.
-
Check continuity between trunk lid opener assembly (ajar switch) harness connector and ground.
Trunk lid opener assembly (ajar switch)
—
Continuity
Connector
Terminal
B59
2
Ground
Yes
-
Is the inspection result normal?
YES >>GO TO 4.
NO >>Repair or replace harness.
-
-
CHECK TRUNK ROOM LAMP SWITCH
-
Refer to Component Inspection.
Is the inspection result normal?
YES >>GO TO 5.
NO >>Replace trunk lid opener assembly (ajar switch). Refer to Removal and Installation.
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CHECK INTERMITTENT INCIDENT
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Refer to Intermittent Incident.
Inspection End.
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Component Inspection
Component Inspection
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CHECK TRUNK ROOM LAMP SWITCH
-
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Ignition switch OFF.
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Disconnect trunk lid opener assembly (ajar switch)connector.
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Check continuing between trunk lid opener assembly (ajar switch) terminal.
Trunk lid opener assembly (ajar switch)
Condition
Continuity
Terminals
1
2
Trunk lid
Open
Yes
Close
No
-
Is the inspection result normal?
YES >>Inspection End.
NO >>Replace trunk lid opener assembly (ajar switch). Refer to Removal and Installation.
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