fuses INFINITI QX56 2008 Factory Service Manual

AV
POWER SUPPLY AND GROUND CIRCUITAV-63
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
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POWER SUPPLY AND GROUND CIRCUIT
AV CONTROL UNIT
AV CONTROL UNIT : Diagnosis ProcedureINFOID:0000000001696097
1.CHECK FUSES
Check that the following AV control unit fuses are not blown.
Are the fuses OK?
YES >> GO TO 2
NO >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.
2.POWER SUPPLY CIRCUIT CHECK
1. Disconnect AV control unit connectors M42 and M45.
2. Check voltage between the AV control unit connectors M42 and M45 and ground.
Are the voltage results as specified?
YES >> GO TO 3
NO >> • Check connector housings for disconnected or loose terminals.
• Repair harness or connector.
3.GROUND CIRCUIT CHECK
Unit Terminals Signal name Fuse No.
AV control unit 19
Battery power 31
66 Battery power 31
68 Battery power 31
7 Ignition switch ACC or ON 4
69 Ignition switch ACC or ON 4
79 Ignition switch ON or START 12
(+)
(-) OFF ACC ON
Connector Terminal
M42 7Ground0V
Battery
voltage Battery
voltage
19 Ground Battery
voltage Battery
voltage Battery
voltage
M45 66 Ground
Battery
voltage Battery
voltage Battery
voltage
68 Ground Battery
voltage Battery
voltage Battery
voltage
69 Ground 0V Battery
voltage Battery
voltage
79 Ground 0V 0V Battery
voltage
AWNIA1554ZZ
Revision: March 2010 2008 QX56

AV-66
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
POWER SUPPLY AND GROUND CIRCUIT
BOSE SPEAKER AMP
BOSE SPEAKER AMP
: Diagnosis ProcedureINFOID:0000000001696100
1.CHECK FUSE
Check that the BOSE speaker amp. fuse is not blown.
Are the fuses OK?
YES >> GO TO 2
NO >> Be sure to eliminate cause of malfunction before installing new fuse.
2.CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BOSE speak er amp. connector.
3. Check voltage between BOSE speaker amp. harness connector M112 terminal 11 and ground.
Is battery voltage present?
YES >> GO TO 3
NO >> Check harness between BOSE speaker amp. and fuse.
3.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BOSE speak er amp. connector.
3. Check continuity between BOSE speaker amp. harness connec- tor M112 terminal 12 and ground.
Does continuity exist?
YES >> Inspection End.
NO >> Repair harness or connector.
WOOFER
WOOFER : Diagnosis ProcedureINFOID:0000000001696101
1.CHECK FUSE
Check that the subwoofer fuse is not blown.
Is the fuse OK?
YES >> GO TO 2
NO >> Be sure to eliminate cause of malfunction before installing new fuse.
2.CHECK POWER SUPPLY CIRCUIT
Unit Terminal Signal name Fuse No.
BOSE speaker amp. 11Battery power 31
(+)
(-) Voltage (approx.)
Connector Terminal
M112 11 Ground Battery voltage
ALNIA0339GB
(+) (-)Continuity
Connector Terminal
M112 12Ground Yes
ALNIA0340GB
Unit Terminal Signal name Fuse No.
Subwoofer 6Battery power 17
Revision: March 2010 2008 QX56

AV
POWER SUPPLY AND GROUND CIRCUITAV-67
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
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1. Turn ignition switch OFF.
2. Disconnect subwoofer connector.
3. Check voltage between subwoofer harness connector B72 ter- minal 6 and ground.
Is battery voltage present?
YES >> GO TO 3
NO >> Check harness between subwoofer and fuse.
3.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between subwoofer harness connector B72 terminal 5 and ground.
Does continuity exist?
YES >> Inspection End.
NO >> Repair harness or connector.
REAR VIEW CAMERA CONTROL UNIT
REAR VIEW CAMERA CONTROL UNIT : Diagnosis ProcedureINFOID:0000000001696102
1.CHECK FUSE
Check that the following fuses of the rear view camera control unit are not blown.
Are the fuses OK?
YES >> GO TO 2
NO >> Be sure to eliminate cause of malfunction before installing new fuse.
2.CHECK POWER SUPPLY CIRCUIT
Check voltage between rear view camera control unit harness con-
nector B73 and ground.
Are the voltage readings as specified?
YES >> GO TO 3
NO >> Check harness between rear view camera control unit and fuse.
3.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear view camera control unit connector.
(+) (-) Voltage (approx.)
Connector Terminal
B72 6 Ground Battery voltage
ALNIA0367GB
(+) (-)Continuity
Connector Terminal
B72 5Ground Yes
ALNIA0368GB
Unit Terminals Signal name Fuse No.
Rear view camera control unit 1
Battery power 31
2 Ignition switch ACC or ON 4
Signal nameConnector
No. Te r m i n a l
No. Ignition switch
position Value (Approx.)
Battery po wer supply
B731OFF
Battery voltage
ACC power supply 2 ACC
ALLIA0244ZZ
Revision: March 2010 2008 QX56

AV
NORMAL OPERATING CONDITIONAV-153
< SYMPTOM DIAGNOSIS > [AUDIO SYSTEM]
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NORMAL OPERATING CONDITION
DescriptionINFOID:0000000001696149
AUDIO SYSTEM
The majority of the audio troubles are the result of outside causes (bad CD, electromagnetic interference,
etc.).
Noise
The following noise results from variations in field strength, such as fading noise and multi-path noise, or
external noise from trains and other sources. It is not a malfunction.
• Fading noise: This noise occurs because of variations in the field strength in a narrow range due to moun-
tains or buildings blocking the signal.
• Multi-path noise: This noise results from the waves sent directly from the broadcast station arriving at the antenna at a different time from the waves which reflect off mountains or buildings.
The vehicle itself can be a source of noise if noise prevention parts or electrical equipment is malfunctioning.
Check if noise is caused and/or changed by engine speed, ignition switch turned to each position, and opera-
tion of each piece of electrical equipment, and determine the cause.
NOTE:
The source of the noise can be found easily by listening to the noise while removing the fuses of electrical
components, one by one.
Type of Noise and Possible Cause
NAVIGATION SYSTEM
Basic Operation
Vehicle Mark
Occurrence condition Possible cause
Occurs only when engine is ON. A continuous growling noise occurs. The speed of
the noise varies with changes in the engine speed. • Ignition components
The occurrence of the noise is linked with the operation of the fuel pump. • Fuel pump condenser
Noise only occurs when various
electrical components are oper-
ating. A cracking or snapping sound occurs with the op-
eration of various switches.
• Relay malfunction, audio unit malfunction
The noise occurs when various motors are operat-
ing. • Motor case ground
•Motor
The noise occurs constantly, not just under certain conditions. • Rear defogger coil malfunction
• Open circuit in printed heater
• Poor ground of antenna feeder line
A cracking or snapping sound occurs while the vehicle is being driven, especially when
it is vibrating excessively. • Ground wire of body parts
• Ground due to improper part installation
• Wiring connections or a short circuit
Symptom
Cause Remedy
No image is shown. Display brightness adjustment is set fully to DARK
side. Adjust the display brightness.
No guide sound is heard.
Audio guide volume is too low or
too high. Volume control is set to OFF, MIN or MAX. Adjust the audio guide volume.
Audio guidance is not available while the vehicle is
driving on a dark pink route.
System is not malfunctioning.
Screen is too dark.
Motion of the image is too slow. Temperature inside the vehicle is low.
Wait until the temperature inside the vehicle
reaches the proper temperature.
Small black or bright spots appear
on the screen. Symptom peculiar to a liquid crystal display (dis-
play unit). System is not malfunction.
Revision: March 2010
2008 QX56

BCS-32
< COMPONENT DIAGNOSIS >[BCM]
POWER SUPPLY AND GROUND CIRCUIT
POWER SUPPLY AND GROUND CIRCUIT
Diagnosis ProcedureINFOID:0000000001696439
1. CHECK FUSES AND FUSIBLE LINK
Check that the following fuses and fusible link are not blown.
Is the fuse blown?
YES >> Replace the blown fuse or fusible link after repairing the affected circuit.
NO >> GO TO 2
2. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM.
3. Check voltage between BCM harness connector and ground.
Is the measurement value normal?
YES >> GO TO 3
NO >> Repair or replace harness.
3. CHECK GROUND CIRCUIT
Check continuity between BCM harness connector and ground.
Does continuity exist?
YES >> INSPECTION END
NO >> Repair or replace harness.
Terminal No. Signal nameFuses and fusible link No.
57 Battery power supply 22 (15A)
70 F (50A)
11 Ignition ACC or ON 4 (10A)
38 Ignition ON or START 59 (10A)
ConnectorTe r m i n a l s
Power
source Condition Voltage (V) (Ap-
prox.)
(+) (-)
M18 11 Ground
ACC
power
supply Ignition
switch
ACC or
ON Battery voltage
38 Ground Ignition
power
supply Ignition
switch ON or START Battery voltage
M20 57 Ground
Battery
power
supply Ignition
switch OFF Battery voltage
70 Ground Battery
power
supply Ignition
switch
OFF Battery voltage
LIIA2415E
BCM
GroundContinuity
Connector Terminal
M20 67 Yes
LIIA0915E
Revision: March 2010 2008 QX56

REAR WINDOW DEFOGGER RELAYDEF-9
< COMPONENT DIAGNOSIS >
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REAR WINDOW DEFOGGER RELAY
DescriptionINFOID:0000000001735612
Power is supplied to the rear window defogger with BCM control.
Component Function CheckINFOID:0000000001735613
1. CHECK REAR WINDOW DEFOGGER RELAY POWER SUPPLY CIRCUIT
Check that an operation noise of rear window defogger re lay (located in IPDM E/R) can be heard when turning
the rear window defogger switch ON.
Is the inspection result normal?
YES >> Rear window defogger relay power supply circuit is OK.
NO >> Refer to DEF-9, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001735614
1.CHECK FUSES
Check if any of the following fuses in the IPDM E/R are blown.
Is the inspection result normal?
YES >> GO TO 2
NO >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.
2. CHECK REAR WINDOW DEFOGGER RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between IPDM E/R connector and ground.
Is the inspection result normal?
YES >> Replace IPDM E/R. Refer to PCS-34, "Removal and Installation of IPDM E/R".
NO >> GO TO 3
3. CHECK INTERMITTENT INCIDENT
Check intermittent incident.
Refer to GI-38, "
Intermittent Incident"
Is the inspection result normal?
YES >> Check the following.
• Battery power supply circuit.
• IPDM E/R.
NO >> Repair or replace the malfunctioning parts.
COMPONENT PARTS AMPEREFUSE NO.
IPDM E/R 15A46
IPDM E/R 15A47
Te r m i n a l s
Condition of rear
window defogger
switch Voltage (V)
(Approx.)
(+)
(–)
IPDM E/R con-
nector Te r m i n a l
E124 60 Ground ON Battery voltage
OFF 0
LIIA2190E
Revision: March 2010 2008 QX56

DLK-64
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
POWER SUPPLY AND GROUND CIRCUIT
POWER SUPPLY AND GROUND CIRCUIT
INTELLIGENT KEY UNIT
INTELLIGENT KEY UNIT
: Diagnosis ProcedureINFOID:0000000001538958
1.CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect Intelligent Key unit connector.
3. Check voltage between Intelligent Key unit harness connector M70 terminals 6, 11 and ground.
Is the inspection result normal?
YES >> GO TO 2
NO >> Repair or replace Intelligent Key unit power supply circuit.
2.CHECK GROUND CIRCUIT
Check continuity between Intelligent Key unit harness connector
M70 terminal 12 and ground.
Is the inspection result normal?
YES >> Power supply and ground circuits are OK.
NO >> Repair or replace the Intelligent Key unit ground circuit.
BCM (BODY CONTROL MODULE)
BCM (BODY CONTROL MODULE) : Diagnosis ProcedureINFOID:0000000004884061
1. CHECK FUSES AND FUSIBLE LINK
Check that the following fuses and fusible link are not blown.
Is the fuse blown?
YES >> Replace the blown fuse or fusible link after repairing the affected circuit.
NO >> GO TO 2
2. CHECK POWER SUPPLY CIRCUIT
Connector Terminals Ignition switch position
M70 (+) (–) OFF
ON
6 Ground 0V Battery voltage
11 Battery voltage Battery voltage
WIIA1171E
12 - Ground : Continuity should exist.
WIIA1172E
Terminal No. Signal nameFuses and fusible link No.
57 Battery power supply 22 (15A)
70 F (50A)
11 Ignition ACC or ON 4 (10A)
38 Ignition ON or START 59 (10A)
Revision: March 2010 2008 QX56

P1811 POWER SUPPLY CIRCUIT FOR TRANSFER CONTROL UNIT
DLN-23
< COMPONENT DIAGNOSIS > [ATX14B]
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• 10A fuses No. 26 located in fuse and fusible link box and No. 59 located in the fuse and relay box.
• 20A fuse No. 53 located in the IPDM E/R.
• Harness for short or open between battery and transfer control unit harness connector terminals
47.
• Harness for short or open between battery and transfer control unit harness connector terminal
29.
• Harness for short or open between battery and transfer shut off relay harness connector E69 terminal 1, and 3.
• Harness for short or open between transfer shut off relay harness connector E69 terminal 2 and transfer control unit harness connector terminal 30.
• Harness for short or open between transfer shut off relay harness connector E69 terminal 5 and transfer control unit harness connector terminals 16 and 22.
• Battery and ignition switch.
• Transfer shut off relay. Refer to DLN-23, "
Component Inspection".
2.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector.
3. Check continuity between transfer control unit harness connec- tor E142 terminals 3, 6, E143 terminal 45 and ground.
Also check harness for short to ground and short to power.
Are the inspection results normal?
YES >> GO TO 3.
NO >> Repair open circuit or short to ground or short to power in harness or connectors.
3.CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to DLN-80, "
Reference Value".
Are the inspection results normal?
YES >> GO TO 4.
NO >> Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.
4.CHECK DTC
Perform the self-diagnosis, after driving a vehicle for a while.
Are the inspection results normal?
YES >> Inspection End.
NO >> Replace transfer control unit. Refer to DLN-128, "
Removal and Installation".
Component InspectionINFOID:0000000001737104
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Remove transfer shut off relay. Refer to DLN-16, "
Component Parts Location".
3. Apply 12V direct current between transfer shut off relay termi- nals 1 and 2.
4. Check continuity between relay terminals 3 and 5.
5. If inspection results are abnormal replace the transfer shut off relay.Continuity should exist.
SDIA2691E
Condition
Continuity
12V direct current supply between terminals 1 and 2 Yes
OFF No
SCIA1245E
Revision: March 2010 2008 QX56

EXL-10
< FUNCTION DIAGNOSIS >
DAYTIME LIGHT SYSTEM
Component Description
INFOID:0000000001547101
After starting the engine with the parking brake released and the lighting switch in the OFF or 1ST position, the
headlamp high beam automatically turns on at a reduced intensity. With the lighting switch in the 2nd position
or with autolamps ON, the headlamps function the same as conventional light systems.
OPERATION
The BCM monitors inputs from the parking brake switch and the combination switch to determine when to acti-
vate the daytime light system. The BCM sends a dayti me light request to the IPDM E/R via the CAN commu-
nication lines. The IPDM E/R grounds the daytime light relay which in turn, provides power to the ground side
of the LH high beam lamp. Power flows backward through the LH high beam lamp to the IPDM E/R, through
the high beam fuses, through the RH high beam lamp circuit to the RH high beam lamp and on to ground. The
high beam lamps are wired in series which causes them to illuminate at a reduced intensity.
1. IPDM E/R E119, E122, E123, E124 2. Parking brake switch M11 3. BCM M18, M20 (view with instrument
panel removed)
4. Daytime running light relay E103 5. Combination switch M28 6. Combination meter M24
Revision: March 2010 2008 QX56

EXL-28
< COMPONENT DIAGNOSIS >
HEADLAMP (HI) CIRCUIT
HEADLAMP (HI) CIRCUIT
DescriptionINFOID:0000000001547125
The IPDM E/R (intelligent power distribution module engine room) controls the headlamp high relay based on
inputs from the BCM via the CAN communication lines. When the headlamp high relay is energized, power
flows through fuses 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:0000000001547126
1.CHECK HEADLAMP (HI) OPERATION
WITHOUT CONTULT-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 LAMP" 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-28, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001547127
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
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 HI : Headlamp switches to the high beam.
OFF : Headlamp OFF
Unit
LocationFuse No.Capacity
Headlamp HI (LH) IPDM E/R3410A
Headlamp HI (RH) IPDM E/R3510A
(+)
(−)Voltage
Connector Terminal
LH E11 6
Ground Battery voltage
RH E107 6
ALLIA0713GB
Revision: March 2010 2008 QX56