2010 INFINITI QX56 headlamp

EXL-24
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (IPDM E/R)
CONSULT - III Func tion (IPDM E/R)
INFOID:0000000005369887
APPLICATION ITEM
CONSULT-III performs the following functi ons via CAN communication with IPDM E/R.
SELF DIAGNOSTIC
Refer to PCS-32, "DTCIndex".
DATA MONITOR
Monitor item
Any of the following components do not operate
• Front wipers
•Tail lamps
• License plate lamps
• Parking lamps
•Front fog lamps
• Headlamps (Hi, Lo) Perform auto active test.
Does the applicable system
operate?YES BCM signal input system
NO • Lamp or front wiper motor
malfunction
• Lamp or front wiper motor ground circuit
• Harness or connector be-
tween IPDM E/R and appli-
cable system
• IPDM E/R (integrated relay
malfunction)
A/C compressor does not operate Perform auto active test.
Does the A/C compressor op-
erate?YES
• BCM signal input circuit
• CAN communication signal
between BCM and ECM
• CAN communication signal between ECM and IPDM E/
R
NO • Magnetic clutch malfunction
• Harness or connector be-
tween IPDM E/R and mag-
netic clutch
• IPDM E/R (integrated relay malfunction)
Cooling fan does not operate Perform auto active test.
Does the cooling fan operate?YES
• ECM signal input circuit
• CAN communication signal
between ECM and IPDM E/
R
NO • Cooling fan motor malfunc-
tion
• Harness or connector be- tween IPDM E/R and cool-
ing fan
• IPDM E/R (integrated relay malfunction)
Symptom
Inspection contentsPossible cause
Diagnosis mode Description
Self Diagnostic Result Displays the diagnosis results judged by IPDM E/R.
Data Monitor Displays the real-time input/output data from IPDM E/R input/output data.
Active Test IPDM E/R can provide a drive signal to electronic components to check their operations.
CAN Diag Support Monitor The results of transmit/receive diagnosis of CAN communication can be read.
Monitor Item
[Unit] MAIN SIG-
NALS Description
MOTOR FAN REQ
[1/2/3/4] ×
Displays the status of the cooling fan speed request signal received from ECM via
CAN communication.
A/C COMP REQ
[OFF/ON] ×Displays the status of the A/C request signal received from AV control unit via
CAN communication.
Revision: April 20092010 QX56

EXL-26
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (IPDM E/R)
EXTERNAL LAMPSOFF
OFF
TAIL Operates the tail lamp relay.
LO Operates the headlamp low relay.
HI Operates the headlamp low relay and the headlamp high LH/RH relays at 1 sec-
ond intervals.
FOG Operates the front fog lamp relay
HORN ONOperates horn relay for 20 ms.
Test item
Operation Description
Revision: April 20092010 QX56

EXL-30
< COMPONENT DIAGNOSIS >
HEADLAMP (HI) CIRCUIT
HEADLAMP (HI) CIRCUIT
DescriptionINFOID:0000000005370270
The IPDM E/R (intelligent power distribution module engine room) controls the headlamp LH high and head-
lamp RH high relays based on inputs from the BCM via the CAN communication lines. When the headlamp LH
high and headlamp RH high relays are energized, power flows through fuse\
s 34 and 35, located in the IPDM
E/R. Power then flows to the front combination lamps to the headlamp high beam.
Component Function CheckINFOID:0000000005146640
1.CHECK HEADLAMP (HI) OPERATION
WITHOUT CONSULT-III
1. Start IPDM E/R auto active test. Refer to PCS-12, "
Diagnosis Description".
2. Check that the headlamp switches to the high beam. NOTE:
HI/LO is repeated 1 second each when usi ng the IPDM E/R auto active test.
CONSULT-III
1. Select "EXTERNAL LAMPS" of IPDM E/R active test item.
2. With the test item operating, check that the headlamp switches to high beam.
Does the headlamp switch to high beam?
YES >> Headlamp (HI) circuit is normal.
NO >> Refer to EXL-30, "
Diagnosis Procedure - Without Daytime Light System", EXL-31, "Diagnosis
Procedure - With Daytime Light System".
Diagnosis Procedure - Wit hout Daytime Light SystemINFOID:0000000005146641
Regarding Wiring Diagram information, refer to EXL-52, "Wiring Diagram".
1.CHECK HEADLAMP (HI) 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 (HI) OUTPUT VOLTAGE Hi : Headlamp switches to the high beam.
Off : Headlamp OFF
Unit
LocationFuse No.Capacity
Headlamp HI (LH) IPDM E/R3510A
Headlamp HI (RH) IPDM E/R3410A
Revision: April 20092010 QX56

HEADLAMP (HI) CIRCUITEXL-31
< COMPONENT DIAGNOSIS >
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1. Turn the ignition switch OFF.
2. Disconnect the front combination lamp connector E11 or E107.
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 >> GO TO 4.
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 >> Repair the harness.
Diagnosis Procedure - With Daytime Light SystemINFOID:0000000005146642
Regarding Wiring Diagram information, refer to EXL-56, "Wiring Diagram".
1.CHECK HEADLAMP (HI) FUSES
1. Turn the ignition switch OFF.
2. Check that the following fuses are not open.
(+) (−)Voltage
Connector Terminal
LH E11 6 Ground Battery voltage
RH E107 6
ALLIA0852ZZ
AB Continuity
Connector Terminal Connector Terminal
LH E123 55
E11 6
Ye s
RH 56E107 6
AWLIA1371ZZ
Connector Terminal —Continuity
LH E11 2
Ground Yes
RH E107 2
ALLIA0854ZZ
Revision: April 20092010 QX56

EXL-32
< COMPONENT DIAGNOSIS >
HEADLAMP (HI) CIRCUIT
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 >> GO TO 4.
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 - RH>>Repair the harness.
NO - LH >>Inspect daytime light rela y. If OK, repair harness. If NG,
replace the daytime light relay.
Unit LocationFuse No.Capacity
Headlamp HI (LH) IPDM E/R3510A
Headlamp HI (RH) IPDM E/R3410A
(+)
(−)Voltage
Connector Terminal
LH E6 6 GroundBattery voltage
RH E108 6
ALLIA0852ZZ
AB
Continuity
Connector Terminal Connector Terminal
LH E123 55
E66
Ye s
RH 56E108 6
AWLIA1371ZZ
Connector Terminal —Continuity
LH E6 2
Ground Yes
RH E108 2
ALLIA0854ZZ
Revision: April 20092010 QX56

HEADLAMP (LO) CIRCUITEXL-33
< COMPONENT DIAGNOSIS >
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HEADLAMP (LO) CIRCUIT
DescriptionINFOID:0000000005146643
The IPDM E/R (intelligent power distribution modul e engine room) controls the headlamp low relay based on
inputs from the BCM via the CAN communication li nes. 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 CheckINFOID:0000000005146644
1.CHECK HEADLAMP (LO) OPERATION
WITHOUT CONSULT-III
1. Start IPDM E/R auto active test. Refer to PCS-12, "
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, c heck that the headlamp is turned ON.
Is the headlamp turned ON?
YES >> Headlamp (LO) is normal.
NO >> Refer to EXL-33, "
Diagnosis Procedure - Without Daytime Light System", EXL-34, "Diagnosis
Procedure - With Daytime Light System".
Diagnosis Procedure - Without Daytime Light SystemINFOID:0000000005146645
Regarding Wiring Diagram information, refer to EXL-52, "Wiring Diagram".
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
LocationFuse No.Capacity
Headlamp LO (LH) IPDM E/R4015A
Headlamp LO (RH) IPDM E/R4115A
Revision: April 20092010 QX56

EXL-34
< COMPONENT DIAGNOSIS >
HEADLAMP (LO) CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect the front combination lamp connector.
3. Turn the ignition switch ON.
4. Turn the low beam headlamps ON.
5. With the low beam headlamps ON, check the voltage betweenthe combination lamp connector and ground.
Is voltage reading as specified?
YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK HEADLAMP (LO) 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 connector.
Does continuity exist?
YES >> GO TO 4.
NO >> Repair the harnesses or connectors.
4.CHECK FRONT COMBINATION LAMP (LO) GROUND CIRCUIT
Check continuity between the front combination lamp harness con-
nector terminal and ground.
Does continuity exist?
YES >> Inspect the headlamp bulb.
NO >> Repair the harness.
Diagnosis Procedure - With Daytime Light SystemINFOID:0000000005146646
Regarding Wiring Diagram information, refer to EXL-56, "Wiring Diagram".
1.CHECK HEADLAMP (LO) FUSES
1. Turn the ignition switch OFF.
2. Check that the following fuses are not open.
(+) (−)V olt a ge
Connector Terminal
LH E11 5
Ground Battery voltage
RH E107 5
ALLIA0855ZZ
AB
Continuity
Connector Terminal Connector Terminal
LH E123 52
E11 5
Ye s
RH 54E107 5
AWLIA1372ZZ
Connector Terminal —Continuity
LH E11 1
Ground Yes
RH E107 1
ALLIA0856ZZ
Revision: April 20092010 QX56

HEADLAMP (LO) CIRCUITEXL-35
< COMPONENT DIAGNOSIS >
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Is the fuse open?
YES >> Repair the harness and replace the fuse.
NO >> GO TO 2.
2.CHECK HEADLAMP (LO) OUTPUT VOLTAGE
1. Turn the ignition switch OFF.
2. Disconnect the front combination lamp connector.
3. Turn the ignition switch ON.
4. Turn the low beam headlamps ON.
5. With the low beam headlamps ON, check the voltage between the combination lamp connector and ground.
Is voltage reading as specified?
YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK HEADLAMP (LO) 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 connector.
Does continuity exist?
YES >> GO TO 4.
NO >> Repair the harnesses or connectors.
4.CHECK FRONT COMBINATION LAMP (LO) GROUND CIRCUIT
Check continuity between the front combination lamp harness con-
nector terminal and ground.
Does continuity exist?
YES >> Inspect the headlamp bulb.
NO - RH>>Repair the harness.
NO - LH>>Inspect the daytime light relay. If OK, repair harness. If
NG, replace the daytime light relay.
Unit LocationFuse No.Capacity
Headlamp LO (LH) IPDM E/R4015A
Headlamp LO (RH) IPDM E/R4115A
(+)
(−)Voltage
Connector Terminal
LH E6 5
Ground Battery voltage
RH E108 5
ALLIA0855ZZ
AB
Continuity
Connector Terminal Connector Terminal
LH E123 52
E6 5
Ye s
RH 54E108 5
AWLIA1372ZZ
Connector Terminal —Continuity
LH E6 1
Ground Yes
RH E108 1
ALLIA0856ZZ
Revision: April 20092010 QX56