Nissan Titan A60. Instruction — part 496
HEADLAMP (HI) CIRCUIT
EXL-39
< DTC/CIRCUIT DIAGNOSIS >
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Is the fuse open?
YES
>> Repair the harness and replace the fuse.
NO
>> GO TO 2.
2.
CHECK HEADLAMP (HI) OUTPUT VOLTAGE
1. Turn the ignition switch OFF.
2. Disconnect the front combination lamp connector E6 or E108.
3. Turn the ignition switch ON.
4. Turn the high beam headlamps ON.
5. With the high beam headlamps ON, check the voltage between
the combination lamp connector and ground.
Are the voltage readings as specified?
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 E123.
3. Check continuity between the IPDM E/R harness connector (A)
and the front combination lamp harness connector (B).
Does continuity exist?
YES
>> Replace IPDM E/R. Refer to
PCS-28, "Removal and Installation of IPDM E/R"
NO
>> Repair the harnesses or connectors.
4.
CHECK FRONT COMBINATION LAMP (HI) GROUND CIRCUIT
Check continuity between the front combination lamp harness con-
nector terminal and ground.
Does continuity exist?
YES
>> Inspect the headlamp bulb.
NO (Except LH with DTRL)>>Repair the harness.
NO (LH with DTRL)>>GO TO 5.
5.
CHECK CONTINUITY BETWEEN FRONT COMBINATION LAMP LH (HI) AND DAYTIME LIGHT RELAY
1. Disconnect daytime light relay connector.
Unit
Location
Fuse No.
Capacity
Headlamp HI (LH)
IPDM E/R
35
10A
Headlamp HI (RH)
IPDM E/R
34
10A
(+)
(
−)
Voltage
Connector
Terminal
LH
E6
2
Ground
Battery voltage
RH
E108
2
ALLIA0386GB
A
B
Continuity
Connector
Terminal
Connector
Terminal
LH
E123
55
E6
2
Yes
RH
56
E108
2
ALLIA0387GB
Connector
Terminal
—
Continuity
LH
E6
3
Ground
Yes
RH
E108
3
ALLIA0388GB
EXL-40
< DTC/CIRCUIT DIAGNOSIS >
HEADLAMP (HI) CIRCUIT
2. Check continuity between front combination lamp LH harness connector and daytime light relay harness
connector.
Does continuity exist?
YES
>> GO TO 6.
NO
>> Repair the harness or connector.
6.
CHECK DAYTIME LIGHT RELAY GROUND CIRCUIT
Check continuity between daytime light relay harness connector and ground.
Does continuity exist?
YES
>> GO TO 7.
NO
>> Repair the harness or connector.
7.
CHECK DAYTIME LIGHT RELAY FUSE
Check that the following fuses are not open.
Is the fuse open?
YES
>> Replace the fuse after repairing the affected circuit.
NO
>> GO TO 8.
8.
CHECK DAYTIME LIGHT CIRCUIT FOR OPEN
1. Disconnect IPDM E/R connector E119 and E122.
2. Check continuity between the IPDM E/R harness connector and the daytime light relay harness connec-
tor.
Does continuity exist?
YES
>> GO TO 9
NO
>> Repair the harnesses or connectors.
9.
CHECK DAYTIME LIGHT RELAY
Check daytime light relay. Refer to
EXL-40, "Component Inspection"
Is the inspection result normal?
YES
>> Replace IPDM E/R. Refer to
PCS-28, "Removal and Installation of IPDM E/R"
NO
>> Replace daytime light relay.
Component Inspection
INFOID:0000000006607848
1.
CHECK DAYTIME LIGHT RELAY
1. Turn ignition switch OFF.
Front combination lamp LH
Daytime light relay
Continuity
Connector
Terminal
Connector
Terminal
E6
3
E103
3
Yes
Daytime light relay
Ground
Continuity
Connector
Terminal
E103
4
Yes
Unit
Location
Fuse No.
Capacity
Daytime light relay
IPDM E/R
45
10A
IPDM E/R
Daytime light relay
Continuity
Connector
Terminal
Connector
Terminal
E119
10
E103
2
Yes
5
E122
44
1
HEADLAMP (HI) CIRCUIT
EXL-41
< DTC/CIRCUIT DIAGNOSIS >
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A
B
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2. Remove daytime light relay.
3. Check the continuity between daytime light relay terminals under the following conditions.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Replace daytime light relay
Terminals
Condition
Continuity
3 and 5
12V direct current supply between terminals 1 and 2
Yes
No current supply
No
3 and 4
12V direct current supply between terminals 1 and 2
No
No current supply
Yes
EXL-42
< DTC/CIRCUIT DIAGNOSIS >
HEADLAMP (LO) CIRCUIT
HEADLAMP (LO) CIRCUIT
Description
INFOID:0000000006179026
The IPDM E/R (intelligent power distribution module engine room) controls the headlamp low relay based on
inputs from the BCM via the CAN communication lines. When the headlamp low relay is energized, power
flows through fuses 40 and 41, located in the IPDM E/R. Power then flows to the front combination lamps to
the headlamp low beam.
Component Function Check
INFOID:0000000006179027
1.
CHECK HEADLAMP (LO) OPERATION
WITHOUT CONSULT-III
1. Start IPDM E/R auto active test. Refer to
PCS-11, "Diagnosis Description"
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-III
1. Select "EXTERNAL LAMPS" of IPDM E/R active test item.
2. With the test items operating, check that the headlamp is turned ON.
Is the headlamp turned ON?
YES
>> Headlamp (LO) is normal.
NO
>> Refer to
EXL-42, "Diagnosis Procedure - Without Daytime Light System"
Procedure - With Daytime Light System"
Diagnosis Procedure - Without Daytime Light System
INFOID:0000000006179028
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 open.
Is the fuse open?
YES
>> Repair the harness and replace the fuse.
NO
>> GO TO 2.
2.
CHECK HEADLAMP (LO) OUTPUT VOLTAGE
LO
: Headlamp ON
OFF
: Headlamp OFF
Unit
Location
Fuse No.
Capacity
Headlamp LO (LH)
IPDM E/R
40
15A
Headlamp LO (RH)
IPDM E/R
41
15A
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