2006 INFINITI QX56 relay

ATC-110
TROUBLE DIAGNOSIS
Revision: November 20092006 QX56
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)
Check continuity between terminals at each switch position.
Rear Blower Switch (Front)
Check continuity between terminals at each switch position.
WJIA0973E
LJIA0113E
LJIA0114E

TROUBLE DIAGNOSISATC-113
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Revision: November 2009 2006 QX56
SYSTEM DESCRIPTION
Component Parts
Rear air control system components are:

Front air control

Rear air control

Air mix door motor (rear)

Rear blower motor relay

Rear blower motor resistor

Rear blower motor
System Operation
Rear Air Control
When the rear blower switch (front) (integral to the front air control) is in the REAR position the rear blower
motor speeds and the rear temperature and mode are controlled by the rear blower switch (rear) and the rear
temperature switch (rear) (both integral to the rear air control).
DIAGNOSTIC PROCEDURE FOR REAR AIR CONTROL
SYMPTOM:

Blower motor operation is malfunctioning. Refer to ATC-101, "Rear Blower Motor Circuit" .

Temperature and mode operation is malfunctioning.
1. CHECK OPERATION FROM FRONT AIR CONTROL
Does rear temperature and mode operate normally from front air control?
YES or NO
YES >> GO TO 2.
NO >> Refer to AT C - 7 9 , "
DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR MOTOR (REAR)" .
WJIA1132E

AV-34
AUDIO
Revision: November 20092006 QX56
Occurrence conditionPossible 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
A whistling noise occurs while the engine speed is
high. A booming noise occurs while the engine is
running and the lighting switch is ON.

Generator
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
operation 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 amplifier or
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

AV-64
TELEPHONE
Revision: November 20092006 QX56
TELEPHONEPFP:28342
Component Parts and Harness Connector LocationEKS00GC0
WKIA4565E
1. Fuse block (J/B)2. Fuse and fusible link box 3. Fuse and relay box
4. Combination meter M24 5. AV switch
M98 6. Audio unit
M45
7. BCM M18, M19 8. Steering wheel audio control
switches 9. Microphone
R108
10. Bluetooth ON indicator R16 11. Bluetooth control unit
B141, B142
(View with seat removed)

AV-134
NAVIGATION SYSTEM
Revision: November 20092006 QX56
Ignition Signal Check for Display Control UnitEKS00GED
1. CHECK IGNITION SIGNAL
1. Disconnect display control unit connector M94.
2. Turn ignition switch ON.
3. Check voltage between display control unit harness connector M94 terminal 12 and ground.
OK or NG
OK >> Replace display control unit. Refer to AV- 1 6 7 , "DISPLAY
CONTROL UNIT" .
NG >> Check harness for open or short between display con- trol unit and fuse.
Reverse Signal Check for NAVI Control UnitEKS00GEE
1. CHECK REVERSE LAMP
1. Turn ignition switch ON.
2. Place A/T selector lever into R-position. Do back-up lamps come on?
YES or NO
YES >> GO TO 2.
NO >> Check back-up lamp system. Refer to . LT- 1 0 9 , "
BACK-UP LAMP"
2. CHECK REVERSE SIGNAL
1. Disconnect NAVI control unit connector B152.
2. Turn ignition switch ON.
3. With the A/T selector lever in R-position, check voltage between NAVI control unit and ground.
OK or NG
OK >> Replace NAVI control unit. Refer to AV- 1 6 8 , "NAVI CONTROL UNIT" .
NG >> Check harness for open or short between NAVI control unit and back-up lamp position relay.
Reverse Signal Check for Display Control UnitEKS00GEF
1. CHECK REVERSE LAMP
1. Turn ignition switch ON.
2. Place A/T selector lever into R-position. Do back-up lamps come on?
YES or NO
YES >> GO TO 2.
NO >> Check back-up lamp system. Refer to LT- 1 0 9 , "
BACK-UP LAMP" .
Battery voltage should exist.
WKIA1230E
Terminals
Selector lever position
(+)
(– )
Connector Terminal R-positionOther than R-
position
B152 65 Ground Battery voltage Approx. 0V
WKIA4213E

NAVIGATION SYSTEMAV-135
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Revision: November 2009 2006 QX56
2. CHECK REVERSE SIGNAL
1. Disconnect display control unit connector M94.
2. Turn ignition switch ON.
3. With the A/T selector lever in R-position, check voltage between display control unit and ground.
OK or NG
OK >> Replace display control unit. Refer to AV- 1 6 7 , "DISPLAY CONTROL UNIT" .
NG >> Check harness for open or short between display control unit and back-up lamp position relay.
AV Communication Line Check (Between Display Control Unit and NAVI Control
Unit)
EKS00GEG
1. CHECK POWER SUPPLY AND GROUND CIRCUIT
Check power supply and ground circuit for NAVI control unit. Refer to AV- 1 2 6 , "
Power Supply and Ground Cir-
cuit Check for NAVI Control Unit" .
OK or NG
OK >> GO TO 2.
NG >> Check the malfunctioning parts.
2. CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect NAVI control unit connector B152 and display control unit connector M95.
3. Check continuity between NAVI control unit and display control unit.
4. Check continuity between NAVI control unit and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
Te r m i n a l s Selector lever position
(+)
(– )
Connector Terminal R-positionOther than
R-position
M94 6 Ground Battery voltage Approx. 0V
SKIA4303E
Terminals
Continuity
BA
Connector Terminal Connector Terminal
NAVI control unit: B152 69
Display con-
trol unit: M95 32
Ye s
70 34
Terminals Continuity
B
—
Connector Terminal
NAVI control unit: B152 69
GroundNo
70
WKIA4214E

BCS-8
BCM (BODY CONTROL MODULE)
Revision: November 20092006 QX56
CAN Communication System DescriptionEKS00D7X
Refer to LAN-26, "CAN COMMUNICATION" .
Power supply [ignition (IGN)/retained
accessory power (RAP)] to power win-
dow and sunroof IGN/RAP supply
Power supply to power window and
sunroof system
Power supply (BAT) to power window
and sunroof Battery power supply Power supply to power window and
sunroof system
Panic alarm

Key switch

Remote keyless entry receiver (keyfob) IPDM E/R
Auto light system

Optical sensor

Combination switch IPDM E/R
Battery saver control

Ignition switch

Combination switch

Front door switch LH and RH IPDM E/R
Headlamp Combination switch IPDM E/R
Tail lamp Combination switch IPDM E/R
Front fog lamp Combination switch IPDM E/R
Turn signal lamp Combination switch

Turn signal lamp

Combination meter
Hazard lamp Hazard switch

Turn signal lamp

Combination meter
Room lamp timer

Key switch

Remote keyless entry receiver (keyfob)

Main power window and door lock/unlock switch

Front door lock assembly LH (key cylinder switch)

All door switches Interior room lamp
Key warning chime

Key switch

Front door switch LH Combination meter (warning
buzzer)
Light warning chime

Combination switch

Key switch

Front door switch LH Combination meter (warning
buzzer)
Vehicle-speed-sensing intermittent
wiper

Combination switch

Combination meter IPDM E/R
Rear window defogger Rear window defogger switch IPDM E/R
Air conditioner switch signal Front air control ECM
Blower fan switch signal Front air control ECM
Low tire pressure warning system Remote keyless entry receiver

Combination meter

Display control unit
Trailer tow (if equipped) Combination switch Trailer turn signal relays
Vehicle security system

Remote keyless entry receiver (keyfob)

Main power window and door lock/unlock switch

Power window and door lock/unlock switch RH

Front door lock assembly LH (key cylinder switch)

All door switches

Back door latch (door ajar switch)

IPDM E/R

Security indicator lamp
System
InputOutput

REMOTE KEYLESS ENTRY SYSTEMBL-45
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Revision: November 2009 2006 QX56
System DescriptionEIS005ZQ
INPUTS
Power is supplied at all times

to BCM terminal 70

through 50A fusible link (letter f , located in the fuse and fusible link box).

to BCM terminal 57

through 15A fuse [No. 22, located in the fuse block (J/B)].
When the key is inserted in the key switch and key lock solenoid, power is supplied

to BCM terminal 37

through key switch and key lock solenoid terminals 3 and 4

through 10A fuse [No. 19, located in the fuse block (J/B)].
When the ignition switch is ACC or ON, power is supplied

to BCM terminal 11

through 10A fuse [No. 4, located in the fuse block (J/B)].
When the ignition switch is ON or START, power is supplied

to BCM terminal 38

through 10A fuse (No. 59, located in the fuse and relay box).
When the front door switch LH is ON (door is OPEN), ground is supplied

to BCM terminal 47

through front door switch LH terminal 2

through front door switch LH case ground.
When the front door switch RH is ON (door is OPEN), ground is supplied

to BCM terminal 12

through front door switch RH terminal 2

through front door switch RH case ground.
When the rear door switch LH is ON (door is OPEN), ground is supplied

to BCM terminal 48

through rear door switch LH terminal 2

through rear door switch LH case ground.
When the rear door switch RH is ON (door is OPEN), ground is supplied

to BCM terminal 13

through rear door switch RH terminal 2

through rear door switch RH case ground.
When the back door latch (door ajar switch) is ON (door is OPEN), ground is supplied

to BCM terminal 43

through back door latch (door ajar switch) terminal 7,

through back door latch (door ajar switch) terminal 8,

through body grounds B7 and B19.
Keyfob signal is input into the BCM from the remote keyless entry receiver.
The remote keyless entry system controls operation of the

power door lock

back door opener

interior lamp and step lamps

panic alarm

hazard and horn reminder

keyless power window down (open)

auto door lock operation