Nissan Xterra. Instruction — part 471
INL-16
< DTC/CIRCUIT DIAGNOSIS >
BATTERY SAVER OUTPUT/POWER SUPPLY CIRCUIT
BATTERY SAVER OUTPUT/POWER SUPPLY CIRCUIT
Description
INFOID:0000000009483124
Provides the battery saver output/power supply. Also cuts the power supply when the interior room lamp bat-
tery saver is activating.
Component Function Check
INFOID:0000000009483125
1.
CHECK BATTERY SAVER OUTPUT/POWER SUPPLY FUNCTION
CONSULT
1. Turn ignition switch ON.
2. Turn each interior room lamp ON.
-
Front room/map lamp assembly
-
Cargo lamp
-
Room lamp 2nd row
3. Select “BATTERY SAVER” of BCM (BATTERY SAVER) active test item.
4. While operating the test item, check that each interior room lamp turns ON/OFF.
Is the inspection result normal?
YES
>> Battery saver output/power supply circuit is normal.
NO
>> Refer to
.
Diagnosis Procedure
INFOID:0000000009483126
Regarding Wiring Diagram information, refer to
.
1.
CHECK BATTERY SAVER OUTPUT/POWER SUPPLY OUTPUT
CONSULT
1. Turn ignition switch ON.
2. Select “BATTERY SAVER” of BCM (BATTERY SAVER) active
test item.
3. While operating the test item, check voltage between BCM con-
nector M20 terminal 56 and ground.
Is the inspection result normal?
YES
>> GO TO 2
NO
>> Replace BCM after making sure the battery saver output/power supply circuit is not shorted to
voltage. Refer to
BCS-50, "Removal and Installation"
.
2.
CHECK BATTERY SAVER OUTPUT/POWER SUPPLY OPEN CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect the following connectors.
-
BCM M20
-
Ignition keyhole illumination (if equipped)
-
Front room/map lamp assembly
-
Cargo lamp
-
Room lamp 2nd row
OFF
: Interior room lamp OFF
ON
: Interior room lamp ON
(+)
(-)
Test item
Voltage
Connector
Terminal
BATTERY SAVER
M20
56
Ground
OFF
0V
ON
Battery voltage
ALLIA0408GB
BATTERY SAVER OUTPUT/POWER SUPPLY CIRCUIT
INL-17
< DTC/CIRCUIT DIAGNOSIS >
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3. Check continuity between BCM connector and each interior room lamp connector.
Is the inspection result normal?
YES
>> GO TO 3
NO
>> Repair the harness or connectors.
3.
CHECK BATTERY SAVER OUTPUT/POWER SUPPLY SHORT CIRCUIT
Check continuity between BCM connector M20 terminal 56 and
ground.
Is the inspection result normal?
YES
>> Replace the interior room lamp. Refer to
.
NO
>> Repair the harness or connectors.
BCM
Interior room lamp
Continuity
Connector
Terminal
Connector
Terminal
M20
56
Ignition keyhole illumination (if equipped)
M150
1
Yes
Front room/map lamp assembly
R9
1
Cargo lamp
R11
2
Room lamp 2nd row
R12
2
Connector
Terminal
—
Continuity
M20
56
Ground
No
ALLIA0409GB
INL-18
< DTC/CIRCUIT DIAGNOSIS >
INTERIOR ROOM LAMP CONTROL CIRCUIT
INTERIOR ROOM LAMP CONTROL CIRCUIT
Description
INFOID:0000000009483127
Controls the following interior room lamps (ground side) by PWM signal.
• Front room/map lamp assembly
• Room lamp 2nd row
NOTE:
PWM signal control period is approximately 250 Hz (in the gradual brightening/dimming).
Component Function Check
INFOID:0000000009483128
CAUTION:
Before performing the diagnosis, check that the following is normal.
• Battery saver output/power supply
• Front room/map lamp bulbs
• Room lamp 2nd row bulb
1.
CHECK INTERIOR ROOM LAMP CONTROL FUNCTION
CONSULT
1. Switch the front room/map lamp assembly and room lamp 2nd row switches to DOOR.
2. Turn ignition switch ON.
3. Select “INT LAMP” of BCM (INT LAMP) active test item.
4. While operating the test item, check that each interior room lamp turns ON/OFF (gradual brightening/dim-
ming).
Is the inspection result normal?
YES
>> Interior room lamp control circuit is normal.
NO
>> Refer to
.
Diagnosis Procedure
INFOID:0000000009483129
Regarding Wiring Diagram information, refer to
.
1.
CHECK INTERIOR ROOM LAMP CONTROL OUTPUT
CONSULT
1. Turn ignition switch ON.
2. Select “INT LAMP” of BCM (INT LAMP) active test item.
3. While operating the test item, check voltage between BCM con-
nector M20 terminal 63 and ground.
Is the inspection result normal?
YES
>> Interior room lamp control circuit is operating normally.
Fixed ON>> GO TO 3
Fixed OFF>> GO TO 2
2.
CHECK INTERIOR ROOM LAMP CONTROL OPEN CIRCUIT
ON
: Interior room lamp gradual brightening
OFF
: Interior room lamp gradual dimming
(+)
(-)
INT LAMP
Voltage
Connector
Terminal
M20
63
Ground
ON
0V
OFF
Battery voltage
ALLIA0410GB
INTERIOR ROOM LAMP CONTROL CIRCUIT
INL-19
< DTC/CIRCUIT DIAGNOSIS >
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1. Turn ignition switch OFF.
2. Disconnect BCM connector M20, room lamp 2nd row connector
and front room/map lamp connector.
3. Check continuity between BCM connector M20 (A) terminal 63
and interior room lamp connectors.
Is the inspection result normal?
YES
>> Check interior room lamp for an open. If OK, replace the
BCM. Refer to
BCS-50, "Removal and Installation"
NG, replace the interior room lamp. Refer to
.
NO
>> Repair the harness or connectors.
3.
CHECK INTERIOR ROOM LAMP CONTROL SHORT CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector M20, room lamp 2nd row connector
and front room/map lamp connector.
3. Check continuity between BCM connector M20 terminal 63 and
ground.
Is the inspection result normal?
YES
>> Check interior room lamp for a short circuit. If OK,
replace the BCM. Refer to
. If NG, replace the interior room lamp. Refer to
INL-59, "Removal and Installation"
.
NO
>> Repair the harness or connectors.
Terminal
Terminal
Continuity
Connector
Terminal
Component
Connector
Terminal
M20 (A)
63
Room lamp 2nd
row
R12 (B)
1
Yes
Front room/map
lamp
R9 (C)
2
AWLIA0727ZZ
Connector
Terminal
—
Continuity
M20
63
Ground
No
ALLIA0413GB
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