2007 INFINITI QX56 fuse

ATC-88
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
Perform a complete operational check for any symptoms. Refer to ATC-50, "Operational Check (Front)".
Does another symptom exist?
YES >> Refer to ATC-32, "How to Perform Trouble Diagnosis for Quick and Accurate Repair" .
NO >> System OK.
3.CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 4.
4.CHECK REAR BLOWER MOTOR CIRCUIT
Check and verify rear blower motor operates in all speeds.
Does blower motor operate in all speeds?
YES >> GO TO 5.
NO >> Refer to "Trouble Diagnosis Procedure For Rear Blower Motor (1 - 4 Speed)".
5.PERFORM SELF-DIAGNOSIS
Perform self-diagnosis to check for any codes. Refer to ATC-48, "
A/C System Self-Diagnosis Function" .
Are any self-diagnosis codes present?
YES >> Refer to ATC-48, "A/C System Self-Diagnosis Function".
NO >> GO TO 6.
6.RECHECK FOR ANY SYMPTOMS
Perform a complete operational check for any symptoms. Refer to ATC-50, "
Operational Check (Front)" .
Does another symptom exist?
YES >> Refer to ATC-32, "How to Perform Trouble Diagnosis for Quick and Accurate Repair".
NO >> Replace front air control. Refer to ATC-123, "
Removal and Installation".
1.DIAGNOSTIC PROCEDURE
Blower motor rotates normally at each speed.
OK or NG
OK >> Inspection End.
NG >> 1. Does not rotate at any speed, GO TO 2. 2. Does not rotate at 1 - 3 speed, GO TO 13.
3. Does not rotate at 4 speed, GO TO 18.
2.CHECK FUSES
Check 15A fuses [Nos. 10 and 11, located in the fuse block (J/B)]. Refer to PG-73
.
OK or NG
OK >> GO TO 3.
NG >> GO TO 8.
3.CHECK REAR BLOWER MOTOR POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect rear blower motor connector.
3. Select any rear blower speed except OFF.
4. Turn ignition switch ON.
5. Check voltage between rear blower motor harness connector B134 terminal 2 and ground.
OK or NG
OK >> GO TO 11.
NG >> GO TO 4. 2 - Ground : Battery voltage.WJIA0596E

TROUBLE DIAGNOSISATC-89
< SERVICE INFORMATION >
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4.CHECK REAR BLOWER MOTOR RELAY
Turn ignition switch OFF.
Refer to "Rear Blower Motor Relay".
OK or NG
OK >> GO TO 5.
NG >> Replace rear blower motor relay.
5.CHECK REAR BLOWER MOTOR POWER FR OM RELAY TO REAR BLOWER MOTOR
1. Reconnect rear blower motor connector.
2. Disconnect rear blower motor relay J-1.
3. Turn ignition switch ON.
4. Set rear blower switch (front) to any position except OFF, REAR, or 4 - speed.
5. Momentarily (no more than 4 seconds), connect a jumper wire
between rear blower motor relay connector J-1 (harness side)
terminals 3 and 5.
OK or NG
OK >> GO TO 6.
NG >> GO TO 10.
6.CHECK REAR BLOWER MOTOR RELAY (COIL SIDE) POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect fuse block (J/B) connector M39.
3. Turn ignition switch ON.
4. Set rear blower switch (front) to any position except OFF, REAR, or 4 - speed.
5. Check voltage between fuse block (J/B) harness connector M39 terminal 3Q and ground.
OK or NG
OK >> GO TO 7.
NG >> GO TO 20.
7.CHECK REAR BLOWER MOTOR RE LAY (COIL SIDE) GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect fuse block (J/B) connector M3.
3. Check continuity between fuse block (J/B) harness connector M3 terminal 7N and ground.
OK or NG
OK >> Replace fuse block (J/B).
NG >> Repair harness or connector.
8.REPLACE FUSE
Refer to PG-73
Fuse should not open when rear blower motor is activated.
OK or NG
OK >> Inspection End.
NG >> GO TO 9.
9.CHECK REAR BLOWER MOTOR POWER SUPPLY CIRCUIT FOR SHORTRear blower motor should rotate.
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3Q - Ground : Battery voltage.
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7N - Ground : Continuity should exist.
WJIA0597E

ATC-90
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
1. Turn ignition switch OFF.
2. Disconnect fuse block (J/B) connector M3 and rear blower motorconnector.
3. Check continuity between rear blower motor harness connector
B134 terminal 2 and ground.
OK or NG
OK >> Check rear blower motor. Refer to ATC-78, "Front
Blower Motor Circuit".
NG >> Repair harness or connector.
10.CHECK REAR BLOWER MOTOR RELAY (SWITCH SIDE) POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect fuse block (J/B) and rear blower motor connectors.
3. Check continuity between fu se block (J/B) harness connector
M3 terminal 3N and 8N and rear blower motor harness connec-
tor B134 terminal 2.
OK or NG
OK >> GO TO 20.
NG >> Repair harness or connector.
11 .CHECK REAR BLOWER MOTOR
Check rear blower motor. Refer to "Rear Blower Motor".
OK or NG
OK >> GO TO 12.
NG >> Replace rear blower motor. refer to ATC-128, "
Removal and Installation"
12.CHECK REAR BLOWER SWITCH (FRONT)
Refer to "Rear Blower Switch (Front)" .
OK or NG
OK >> GO TO 15.
NG >> Replace rear blower switch (front). Refer to ATC-123, "
Removal and Installation"
13.CHECK REAR BLOWER MOTOR RESISTOR
Refer to "Rear Blower Motor Resistor".
OK or NG
OK >> GO TO 14.
NG >> Replace rear blower motor resistor. Refer to ATC-144
14.CHECK REAR BLOWER SWITCH (FRONT) CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear blower switch (front) M52.
3. Turn ignition switch ON.
4. Reconnect rear blower motor resistor harness connector B133.
5. Check voltage between each rear blower switch (front) connec- tor M52 terminals 3, 7, and 8, and ground.2 - Ground : Continuity should not exist.
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3N, 8N - 2 : Continuity should exist.
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Te r m i n a l N o .
Voltage
(+) (-)
3 Ground Approx. 12V
7
8
LJIA0108E

ATC-92
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
18.CHECK REAR BLOWER SWITCH (FRONT)
Refer to "Rear Blower Switch (Front)".
OK or NG
OK >> GO TO 19.
NG >> Replace rear blower switch (front). Refer to ATC-123, "
Removal and Installation"
19.CHECK REAR BLOWER SWITCH (REAR)
Refer to "Rear Blower Switch (Rear)" .
OK or NG
OK >> Inspection End.
NG >> Replace rear blower switch (rear). Refer to ATC-123, "
Removal and Installation"
20.CHECK CIRCUIT BETWEEN FRONT AIR CONTROL AND FUSE BLOCK (J/B) [REAR BLOWER MO-
TOR RELAY (COIL SIDE) POWER]
1. Disconnect front air control and fuse block (J/B) connectors
M39.
2. Check continuity between front air control harness connector M50 terminal 38 and fuse block (J/B) connector M39 terminal
3Q.
OK or NG
OK >> Replace front air control. Refer to ATC-123, "Removal
and Installation" .
NG >> Repair harness or connector.
COMPONENT INSPECTION
Rear Blower Motor Relay
Check circuit continuity between terminals by supplying 12 volts and
ground to coil side terminals of relays.
Rear Blower Switch (Rear)
Continuity should exist.
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WJIA0973E

ATC-98
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
YES or NO
YES >> • WITH CONSULT-IIGO TO 5.
• WITHOUT CONSULT-II GO TO 6.
NO >> Check 10A fuse (No. 42, located in IPDM E/R), and GO TO 3.
3.CHECK CIRCUIT CONTINUITY BETW EEN IPDM E/R AND COMPRESSOR
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector and compressor (magnet clutch) connector.
3. Check continuity between IPDM E/R harness connector E119 terminal 11 and compressor harness connector F3 terminal 1.
OK or NG
OK >> GO TO 4.
NG >> Repair harness or connector.
4.CHECK MAGNET CLUTCH CIRCUIT
Check for operation sound when applying battery voltage direct cur-
rent to terminal.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-28, "Removal and
Installation of IPDM E/R".
NG >> Replace magnet clutch. Refer to ATC-155, "
Removal
and Installation for Compressor Clutch".
5.CHECK BCM INPUT (COMPRESSOR ON) SIGNAL
Check compressor ON/OFF signal. Refer to ATC-30, "
CONSULT-II
Function (HVAC)" .
OK or NG
OK >> GO TO 8.
NG >> GO TO 6.
6.CHECK CIRCUIT CONTINUITY BETWEE N BCM AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect BCM connector and front air control connector.
3. Check continuity between BCM harness connector M18 terminal 27 and front air control harness connector M49 terminal 12.
OK or NG
OK >> GO TO 7.
NG >> Repair harness or connector.
11 – 1 : Continuity should exist.
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A/C SW ON : COMP ON SIG ON
A/C SW OFF : COMP ON SIG OFF
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27 - 12 Continuity should exist.
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ATC-134
< SERVICE INFORMATION >
HEATER & COOLING UNIT ASSEMBLY
5. Disconnect the front heater hoses from the front heater core.
6. Disconnect the high/low pressure pipes from the front expansion valve.
7. Remove the instrument panel and console panel. Refer to IP-10, "
Removal and Installation".
8. Remove the steering column. Refer to PS-10
.
9. Disconnect the instrument panel wire harness at the RH and LH in-line connector brackets, and the fuse
block (J/B) electrical connectors. Refer to PG-3
.
10. Disconnect the steering member from each side of the vehicle body.
11. Remove the front heater and cooling unit assembly with it attached to the steering member, from the vehi-
cle.
CAUTION:
Use care not to damage the seats and interior tr im panels when removing the front heater and
cooling unit assembly with it at tached to the steering member.
12. Remove the front heater and cooling unit assembly from the steering member.
Installation
Installation is in the reverse order of removal.
CAUTION:
• Replace the O-ring of the low-pressure pipe and high-pressure pipe with a new one, and apply com-
pressor oil to it when installing it.
• After charging the refrigerant, check for leaks.
NOTE:
• Fill the engine cooling system with the s pecified coolant mixture. Refer to MA-12, "
Changing Engine Cool-
ant".
• Recharge the A/C system. Refer to ATC-150, "
HFC-134a (R-134a) Service Procedure".
REAR HEATER AND COOLING UNIT ASSEMBLY
Removal
1. Discharge the refrigerant from the A/C system. Refer to ATC-150, "HFC-134a (R-134a) Service Proce-
dure".
2. Drain the coolant from the engine cooling system. Refer to MA-12, "
Changing Engine Coolant".
3. Disconnect the rear heater core hoses from the rear heater core.
4. Disconnect the rear A/C pipes from the rear expansion valve.
5. Remove the luggage side finisher lower RH. Refer to EI-34
.
6. Disconnect the following electrical connectors: • Rear blower motor
• Rear blower motor resistor
• Rear air mix door motor
7. Disconnect the ducts from the rear heater and cooling unit assembly.
8. Remove the rear heater and cooling unit assembly.
Installation
Installation is in the reverse order of removal.
CAUTION:
• Replace the O-ring of the low-pressure pipe and high-pressure pipe with a new one, and apply com-
pressor oil to it when installing it.
• After charging the refrigerant, check for leaks.
NOTE:
• Fill the engine cooling system with the s pecified coolant mixture. Refer to MA-12, "
Changing Engine Cool-
ant".
• Recharge the A/C system. Refer to ATC-150, "
HFC-134a (R-134a) Service Procedure".
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AUDIO
AV-5
< SERVICE INFORMATION >
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AUDIO
Component Parts and Harness Connector LocationINFOID:0000000003533663
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1. Fuse block (J/B) 2. Fuse and fusible link box 3. Front tweeter LH
M109
4. Combination meter
M245. Center speaker
M1106. Display unit
M93

AV-6
< SERVICE INFORMATION >
AUDIO
System Description
INFOID:0000000003533664
Refer to Owner's Manual for audio system operating instructions.
Power is supplied at all times
• through 15A fuse [No. 17, located in the fuse block (J/B)]
• to subwoofer terminal 6
• through 20A fuse [No. 31, located in the fuse and fusible link box]
• to audio unit terminal 6
• to BOSE speaker amp. terminal 1
• to AV switch terminal 1 and
• to display control unit terminal 1.
With the ignition switch in the ACC or ON position, power is supplied
• through 10A fuse [No. 4, located in the fuse block (J/B)]
• to audio unit terminal 10 and
• to AV switch terminal 2 and
• to display control unit terminal 10.
With the ignition switch in the ON or START position, power is supplied
• through 10A fuse [No. 12, located in the fuse block (J/B)]
• to display control unit terminal 12.
Ground is supplied through the case of the audio unit.
Ground is also supplied
• to subwoofer terminal 5
• through body grounds B7 and B19 and
• to BOSE speaker amp. terminal 17
• to AV switch terminal 5 and
• to display unit terminal 1 and
• to display control unit terminal 3
• through body grounds M57, M61 and M79.
Then audio signals are supplied
• through audio unit terminals 1, 2, 3, 4, 13, 14, 15 and 16
• to BOSE speaker amp. terminals 23, 24, 25, 26, 27, 28, 29 and 30.
Audio signals are amplified by the BOSE speaker amp.
The amplified audio signals are supplied
• through BOSE speaker amp. terminals 2, 3, 9,10,11,12, 13, 14, 15, 16, 18 and 19
• to terminals + and - of front door speaker LH and RH and
• to terminals + and - of front tweeter LH and RH and
• to terminals + and - of center speaker and
• to terminals + and - of rear door speaker LH and RH and
• to terminals + and - of rear door tweeter LH and RH and
• to terminals 1 and 2 of subwoofer.
When one of steering wheel audio control switches is pushed, the resistance in steering switch circuit changes
depending on which button is pushed.
Rear Audio Remote Control Unit
Power is supplied
• from audio unit terminal 32
• to rear audio remote control unit terminal 13.
Ground is supplied
• to rear audio remote control unit terminal 15
7. Display control unit
M94, M958. Front tweeter RH
M 1119. AV Switch
M98
10. Audio unit
M43, M44, M45, M4611. BOSE speaker amp
M112, M11312. Satellite radio tuner (pre-wiring or factory
installed, if equipped)
M41
13. Steering wheel audio control switches 14. Front door speaker LH, RH
D12, D11215. Rear door tweeter LH, RH
D208, D308
16. Rear door speaker LH, RH
D207, D30717. Driver seat 18. Subwoofer
B72
19. Rear audio remote control unit
R204