Nissan Sentra. Instruction — part 471
DIAGNOSIS AND REPAIR WORK FLOW
EXL-87
< BASIC INSPECTION >
C
D
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G
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A
B
EXL
N
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YES
>> Inspection End.
NO
>> GO TO 3
EXL-88
< DTC/CIRCUIT DIAGNOSIS >
HEADLAMP (HI) CIRCUIT
DTC/CIRCUIT DIAGNOSIS
HEADLAMP (HI) CIRCUIT
Description
INFOID:0000000009757507
The IPDM E/R (intelligent power distribution module engine room) controls the headlamp high relay based on
inputs from the BCM over the CAN communication lines. When the headlamp high relay is energized, power
flows through fuses 41 and 42, located in the IPDM E/R. Power then flows to the front combination lamps to
the headlamp high beam.
Component Function Check
INFOID:0000000009757508
1.
CHECK HEADLAMP (HI) OPERATION
WITHOUT CONSULT
1. Start IPDM E/R auto active test. Refer to
EXL-24, "Diagnosis Description"
(with Intelligent Key system) or
EXL-28, "Diagnosis Description"
(without Intelligent Key system).
2. Check that the headlamp switches to the high beam.
NOTE:
HI/LO is repeated 1 second each when using the IPDM E/R auto active test.
CONSULT
1. Select EXTERNAL LAMP of IPDM E/R active test item.
2. While operating the test items, check that the headlamp switches to the high beam.
Is the inspection result normal?
YES
>> Headlamp (HI) circuit is normal.
NO
>> Refer to
.
Diagnosis Procedure
INFOID:0000000009757509
Regarding Wiring Diagram information, refer to
1.
CHECK HEADLAMP (HI) FUSES
1. Turn the ignition switch OFF.
2. Check that the following fuses are not blown.
Is the fuse blown?
YES
>> Replace the fuse after repairing the affected circuit.
NO
>> GO TO 2.
2.
CHECK HEADLAMP (HI) OUTPUT VOLTAGE
CONSULT ACTIVE TEST
1. Turn the ignition switch OFF.
2. Disconnect the front combination lamp harness connector in question.
3. Turn the ignition switch ON.
4. Select EXTERNAL LAMP of IPDM E/R active test item.
5. With EXTERNAL LAMP ON, check the voltage between the combination lamp connector and ground.
HI
: Headlamp switches to the high beam.
OFF
: Headlamp OFF
Unit
Location
Fuse No.
Capacity
Headlamp HI (LH)
IPDM E/R
42
10A
Headlamp HI (RH)
IPDM E/R
41
10A
HEADLAMP (HI) CIRCUIT
EXL-89
< DTC/CIRCUIT DIAGNOSIS >
C
D
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F
G
H
I
J
K
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A
B
EXL
N
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Is the inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 3.
3.
CHECK HEADLAMP (HI) CIRCUIT FOR OPEN
1. Turn the ignition switch OFF.
2. Disconnect IPDM E/R connector.
3. Check continuity between the IPDM E/R harness connector and the front combination lamp harness con-
nector.
Is the inspection result normal?
YES
>> Replace IPDM E/R. Refer to
PCS-30, "Removal and Installation"
(with Intelligent Key system) or
PCS-58, "Removal and Installation"
(without Intelligent Key system).
NO
>> Repair or replace the harness or connector.
4.
CHECK FRONT COMBINATION LAMP (HI) GROUND CIRCUIT
Check continuity between the front combination lamp harness connector terminal and ground.
Is the inspection result normal?
YES
>> Inspect the headlamp bulb.
NO
>> Repair or replace the harness or connector.
(+)
(
−)
Voltage
Connector
Terminal
RH
E20
2
Ground
Battery voltage
LH
E21
IPDM E/R
Front combination lamp
Continuity
Connector
Terminal
Connector
Terminal
RH
E43
5
E20
2
Yes
LH
6
E21
Connector
Terminal
—
Continuity
RH
E20
6
Ground
Yes
LH
E21
EXL-90
< DTC/CIRCUIT DIAGNOSIS >
HEADLAMP (LO) CIRCUIT
HEADLAMP (LO) CIRCUIT
Description
INFOID:0000000009757510
The IPDM E/R (intelligent power distribution module engine room) controls the headlamp low relay based on
inputs from the BCM over the CAN communication lines. When the headlamp low relay is energized, power
flows through fuses 43 and 44, located in the IPDM E/R. Power then flows to the front combination lamps to
the headlamp low beam.
Component Function Check
INFOID:0000000009757511
1.
CHECK HEADLAMP (LO) OPERATION
WITHOUT CONSULT
1. Start IPDM E/R auto active test. Refer to
EXL-24, "Diagnosis Description"
(with Intelligent Key system) or
EXL-28, "Diagnosis Description"
(without Intelligent Key system).
2. Check that the headlamp is turned ON.
NOTE:
HI/LO is repeated 1 second each when using the IPDM E/R auto active test.
CONSULT
1. Select EXTERNAL LAMP of IPDM E/R active test item.
2. While operating the test items, check that the headlamp is turned ON.
Is the inspection result normal?
YES
>> Headlamp (LO) is normal.
NO
>> Refer to
.
Diagnosis Procedure
INFOID:0000000009757512
Regarding Wiring Diagram information, refer to
1.
CHECK HEADLAMP (LO) FUSES
1. Turn the ignition switch OFF.
2. Check that the following fuses are not blown.
Is the fuse blown?
YES
>> Replace the fuse after repairing the affected circuit.
NO
>> GO TO 2.
2.
CHECK HEADLAMP (LO) OUTPUT VOLTAGE
CONSULT
1. Turn the ignition switch OFF.
2. Disconnect the front combination lamp harness connector in question.
3. Turn the ignition switch ON.
4. Select EXTERNAL LAMP of IPDM E/R active test item.
5. With EXTERNAL LAMP ON, check the voltage between the combination lamp connector and ground.
LO
: Headlamp ON
OFF
: Headlamp OFF
Unit
Location
Fuse No.
Capacity
Headlamp LO (RH)
IPDM E/R
44
15A
Headlamp LO (LH)
IPDM E/R
43
15A
(+)
(
−)
Voltage
Connector
Terminal
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