2007 INFINITI QX56 ECO mode

TROUBLE DIAGNOSISATC-57
< SERVICE INFORMATION >
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1. Press the mode switch to the D/F ( ) mode.
2. Check voltage between front air control harness connector M49 terminal 5 and terminal 6 while pressing the mode switch to the
vent ( ) mode.
OK or NG
OK >> GO TO 4.
NG >> Replace front air control. Refer to ATC-123, "
Removal and Installation" .
4.CHECK MODE DOOR MOTOR AND CIRCUITS FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect the front air control harness connector.
3. Check continuity between front air control harness connector
M49 terminal 5 and terminal 6.
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
5.CHECK MODE DOOR MOTOR CIRCUITS FOR OPEN
1. Disconnect the mode door motor harness connector.
2. Check continuity between front air control harness connector
M49 terminal 5, 6 and the mode door motor harness connector
terminal 5, 6.
OK or NG
OK >> Replace mode door motor. Refer to ATC-140, "Removal
and Installation" .
NG >> Repair or replace harness as necessary.
6.CHECK FRONT AIR CONTROL FOR PBR POWER AND GROUND
1. Reconnect front air control harness connector.
2. Turn ignition switch ON.
3. Check voltage between front air control harness connector M49 terminal 2 and terminal 15.
OK or NG
OK >> GO TO 8.
NG >> GO TO 7.
7.CHECK PBR REFERENCE VOLTAGE CIRCUIT FOR SHORT TO GROUND
ConnectorTe r m i n a l s
Condition Voltage
(Approx.)
(+) (-)
Front air control: M49 5 6 Press
mode
switch Battery
voltage
WJIA1742E
Continuity should exist.
WJIA1728E
5 - 5 : Continuity should exist.
6 - 6 : Continuity should exist.
LJIA0027E
Connector Te r m i n a l s
Voltage (Ap-
prox.)
(+) (-)
Front air control: M49 2 15 5V
WJIA1729E

ATC-58
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
1. Turn ignition switch OFF.
2. Disconnect the front air control harness connector.
3. Check continuity between front air control harness connectorM49 terminal 2 and ground.
OK or NG
OK >> Replace front air control. Refer to ATC-123, "Removal
and Installation" .
NG >> Repair or replace harness as necessary.
8.CHECK PBR REFERENCE VOLTAGE AND GROUND CIRCUITS
1. Turn ignition switch OFF.
2. Disconnect the front air control harness connector.
3. Check continuity between front air control harness connector M49 terminal 2 and terminal 15.
OK or NG
OK >> GO TO 10.
NG >> GO TO 9.
9.CHECK PBR REFERENCE VO LTAGE CIRCUIT FOR OPEN
1. Disconnect the mode door motor harness connector.
2. Check continuity between mode door motor harness connector M142 (B) terminal 3, 1 and front air control harness connector
M49 (A) terminal 2, 15.
OK or NG
OK >> Replace mode door motor. Refer to ATC-140, "Removal
and Installation" .
NG >> Repair or replace harness as necessary.
10.CHECK PBR FEEDBACK VOLTAGE
1. Reconnect the front air control harness connector.
2. Turn ignition switch ON.
3. Check voltage between front air control harness connector M49 terminal 16 and ground while cycling mode switch through all
modes.
OK or NG
OK >> GO TO 12.
NG >> GO TO 11.
11 .CHECK PBR FEEDBACK SIGNAL CIRCUIT FOR SHORT TO GROUND Continuity should not exist.
WJIA1730E
Continuity should exist.
WJIA1731E
2 - 3 : Continuity should exist.
15 - 1 : Continuity should exist.
WJIA1732E
Voltage : Approx. 1V - 4.5V
LJIA0032E

ATC-80
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
System Operation
Automatic Mode
In the automatic mode, the blower motor speed is calculated by the front air control and variable blower control
based on input from the in-vehicle sensor, optical sens or, intake sensor and ambient sensor, and potentio tem-
perature control (PTC).
When the air flow is increased, the blower motor s peed is adjusted gradually to prevent a sudden increase in
air flow.
In addition to manual air flow control and the usual automat ic air flow control, starting air flow control, low
water temperature starting control and high passenger co mpartment temperature starting control are avail-
able.
Starting Blower Speed Control
Start up from cold soak condition (Automatic mode).
In a cold start up condition where the engine coolant temperature is below 50 °C (122 °F), the blower will not
operate at blower speed 1 for a short period of time ( up to 210 seconds). The exact start delay time varies
depending on the ambient and engine coolant temperatures.
In the most extreme case (very low ambient temper ature) the blower starting delay will be 210 seconds as
described above. After the coolant temperature reaches 50 °C (122 °F), or the 210 seconds has elapsed, the
blower speed will increase to the objective blower speed.
Start up from usual operating or hot soak condition (Automatic mode).
The blower will begin operation momentarily after the AUTO switch is pushed. The blower speed will gradually
rise to the objective speed over a time period of 3 seconds or less (actual time depends on the objective
blower speed).
Blower Speed Compensation - Sunload
When the in-vehicle temperature and the set temperature are very close, the blower will be operating at low
speed. The speed will vary depending on the sunload. During conditions of low or no sunload, the blower
operates at low speed. During high sunload conditions, the front air control causes the blower speed to
increase.
Blower Speed Control Specification
WJIA1357E
WJIA0441E

ATC-130
< SERVICE INFORMATION >
IN-CABIN MICROFILTER
IN-CABIN MICROFILTER
Removal and InstallationINFOID:0000000003533277
FUNCTION
The air inside the passenger compartment is filtered by the in-cabin
microfilters when the heater or A/C controls are set on either the
recirculation or fresh mode. The two in-cabin microfilters are located
in the front heater and cooling unit assembly. The rear heater and
cooling unit assembly only draws in air from the passenger compart-
ment to recirculate into the passenger compartment, so the rear
heater and cooling unit assembly is not equipped with in-cabin
microfilters.
REPLACEMENT TIMING
Replacement of the two in-cabin microfilters is recommended on a regular interval depending on the driving
conditions. Refer to MA-6
. It may also be necessary to replace the tw o in-cabin microfilters as part of a compo-
nent replacement if the in-cabin microfilters are damaged.
REPLACEMENT PROCEDURE
1. Remove the two lower glove box hinge pins to remove the glove box from the instrument panel and let it hang from the cord.
2. Remove the screw and remove the in-cabin microfilter cover.
3. Remove the in-cabin microfilters from the front heater and cool- ing unit assembly housing.
4. Insert the first new in-cabin micr ofilter into the front heater and
cooling unit assembly housing and slide it over to the right.
Insert the second new in-cabin mi crofilter into the front heater
and cooling unit assembly housing.
NOTE:
The in-cabin microfilters are marked with air flow arrows. The
end of the microfilter with the arro w should face the rear of the
vehicle. The arrows should point downward.
LJIA0012E
WLIA0027E
LJIA0134E
LJIA0148E

REFRIGERANT LINESATC-169
< SERVICE INFORMATION >
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b. Air flow to VENT mode
c. Intake position to RECIRCULATION mode
d. Temperature to MAX cold
e. Blower fan speed to HIGH
10. Run the engine at 1,500 rpm for at least 2 minutes.
11. Turn the engine OFF and perform the leak check again following steps 4 through 6 above.
Refrigerant leaks should be chec ked immediately after turning
the engine OFF. Begin with the leak detector at the compressor.
The pressure on the high pressure side will gradually drop after
the refrigerant circulation stops and pressure on the low pres-
sure side will gradually rise, as shown in the graph. Some leaks
are more easily detected when the pressure is high.
12. Before connecting the recovery/recycling equipment to the vehicle, check the recovery/recycling equip-
ment gauges. No refrigerant pr essure should be displayed. If pressure is displayed, recover the refriger-
ant from the equipment lines and then check the refrigerant purity.
13. Confirm refrigerant purity in supply tank using recovery/recycling equipment and refrigerant identifier
equipment (J-41810-NI).
14. Confirm the refrigerant purity in the vehicle's A/C system using recovery/recycling equipment and refriger-
ant identifier equipment (J-41810-NI).
15. Discharge the A/C system using recovery/recycling equipment. Repair the leaking fitting or component as
necessary.
16. Evacuate and recharge the A/C system and perform the leak test to confirm that there are no refrigerant
leaks.
17. Conduct the Operational Check to ens ure system works properly. Refer to ATC-50, "
Operational Check
(Front)" and ATC-51, "Operational Check (Rear)".
SHA839E

AV-2
Wiring Diagram - COMM - ......................................86
Terminal and Reference Value for NAVI Control
Unit .........................................................................
89
Terminal and Reference Value for Display Control
unit ..........................................................................
91
Terminal and Reference Value for Display unit ......95
Terminal and Reference Value for AV Switch ........96
Terminal and Reference Value for BCM .................97
On Board Self-Diagnosis Function .........................97
Self-Diagnosis Mode (DCU) ...................................98
Self-Diagnosis Mode (NAVI) ..................................101
Confirmation/Adjustment Mode .............................103
CAN Diagnostic Support Monitor ...........................109
AV Switch Self-Diagnosis Function .......................110
Power Supply and Ground Circuit Inspection for
NAVI Control Unit ..................................................
110
Power Supply and Ground Circuit Inspection for
Display Control Unit ...............................................
111
Power Supply and Ground Circuit Inspection for
Display Unit ...........................................................
112
Power Supply and Ground Circuit Inspection for
AV Switch ..............................................................
113
Vehicle Speed Signal Inspection for NAVI Control
Unit ........................................................................
114
Vehicle Speed Signal Inspection for Display Con-
trol Unit ..................................................................
115
Illumination Signal Inspection for NAVI Control
Unit ........................................................................
116
Illumination Signal Inspection for Display Control
Unit ........................................................................
116
Ignition Signal Inspection for NAVI Control Unit ....117
Ignition Signal Inspection for Display Control Unit ..117
Reverse Signal Inspection for NAVI Control Unit ..117
Reverse Signal Inspection for Display Control Unit
..
118
AV Communication Line Check (Between Display
Control Unit and NAVI Control Unit) ......................
118
Audio Communication Line Check (Between Dis-
play Control Unit and Audio Unit) ..........................
119
Display Communication Line Check (Between
Display Control Unit and Display Unit) ...................
121
AV Communication Line Check (Between Display
Control Unit and AV Switch) ..................................
122
CAN Communication Line Check ..........................123
If NAVI Control Unit Detects That DVD-ROM Map
Is Not Inserted .......................................................
123
If NAVI Control Unit Detects That Inserted DVD-
ROM Map Is Malfunctioning or If It Is Impossible to
Load Data from DVD-ROM Map ...........................
123
If Connection Between NAVI Control Unit and
GPS Antenna Is Malfunctioning ............................
124
Operating Screen for Audio and A/C Is Not Dis-
played When Showing NAVI Screen ....................
124
Color of RGB Image Is Not Proper (Only NAVI
Screen Looks Bluish) ............................................
125
Color of RGB Image Is Not Proper (Only NAVI
Screen Looks Reddish) .........................................
126
Color of RGB Image Is Not Proper (Only NAVI
Screen Looks Yellowish) .......................................
127
Color of RGB Image Is Not Proper (All Screens
Look Bluish) ..........................................................
128
Color of RGB Image Is Not Proper (All Screens
Look Reddish) .......................................................
129
Color of RGB Image Is Not Proper (All Screens
Look Yellowish) .....................................................
129
NAVI Screen Is Rolling .........................................130
Guide Sound Is Not Heard ....................................132
Screen Is Not Shown ............................................132
A/C Screen Is Not Shown (NAVI Screen Is
Shown) ..................................................................
133
FUEL ECONOMY Screen Is Not Shown ..............133
Average Fuel Economy Display Is Not Shown ("
*** " Is Shown) .......................................................
133
Distance to Empty Display Is Not Shown (" *** " Is
Shown) ..................................................................
133
Driving Distance or Average Speed Display Is Not
Shown (" *** " Is Shown) .......................................
134
WARNING DOOR OPEN Screen Is Not Shown ...134
Unable to Operate All of AV Switches (Unable to
Start Self-Diagnosis) .............................................
134
Audio Does Not Work ...........................................135
Navigation System Does Not Activate ..................135
Previous NAVI Conditions Are Not Stored ............135
Previous Vehicle Conditions Are Not Stored ........135
Position of Current Location Mark Is Not Correct .135
Radio Wave from GPS Satellite Is Not Received .136
Driving Test ...........................................................136
Example of Symptom Judged Not Malfunction .....137
Program Loading of NAVI Control Unit .................145
Removal and Installation .......................................145

AUDIO
AV-29
< SERVICE INFORMATION >
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STARTING THE SELF-DIAGNOSIS MODE
1. Turn ignition switch from OFF to ACC.
2. Within 10 seconds press and hold the switches “MEMORY 1”
and “MEMORY 6” simultaneously for 3 seconds.
Then the self-diagnosis operates. A single beep indicates self-
diagnosis mode is active.
3. Press each switch and listen for beep.
NOTE:
CD player LOAD and EJECT buttons are not included in this test
and will not beep when pressed.
EXITING THE SELF-DIAGNOSIS MODE
Turn ignition switch OFF. Then the self-diagnosis ends.
DIAGNOSIS FUNCTION
• It can check for continuity of the switches by sounding the beep when each AV switch and steering switch is
pressed.
• It can check for continuity of harness between AV switch and steering switch.
Trouble DiagnosisINFOID:0000000003533673
The majority of the audio troubles are the result of outside causes (bad CD, electromagnetic interference,
etc.). Check the inspection items below to diagnose the malfunction.
MALFUNCTION WITH RADIO AND CD
Before proceeding, confirm that other AV switch functions (except audio functions) operate. If not, refer to AV-
134, "Unable to Operate All of AV Switches (Unable to Start Self-Diagnosis)".
WKIA4455E
Symptom Possible cause
Inoperative• Audio unit power circuit check. Refer to AV- 3 1 , "
Power Supply Circuit Inspec-
tion".
• Audio communication line check. Refer to AV- 3 8 , "
Audio Communication
Line Check".
• AV switch check. Refer to AV- 3 8 , "
AV S w i t c h C h e c k".
If above check is OK, replace audio unit. Refer to AV- 4 6 , "
Removal and Instal-
lation".
Steering switch does not operate• Steering switch check. Refer to AV- 3 7 , "
Steering Switch Check".
• AV switch check. Refer to AV- 3 8 , "
AV S w i t c h C h e c k".
If above check is OK, replace audio unit. Refer to AV- 4 6 , "
Removal and Instal-
lation".
Audio information is not displayed on screen • Display unit check. Refer to AV- 9 8 , "
Self-Diagnosis Mode (DCU)".
All speakers do not sound• Audio unit
• BOSE speaker amp. power supply and ground circuit check. Refer to AV- 3 1 ,
"Power Supply Circuit Inspection".
• BOSE speaker amp. ON signal
• BOSE speaker amp.
One or several speakers do not sound• Front door speaker check. Refer to AV- 3 9 , "
Sound Is Not Heard from Front
Door Speaker or Front Tweeter".
• Rear door speaker check. Refer to AV- 4 1 , "
Sound Is Not Heard from Rear
Door Speaker or Rear Door Tweeter".
• Subwoofer check. Refer to AV- 4 4 , "
Sound Is Not Heard from Subwoofer".
• Center speaker check. Refer to AV- 4 4 , "
Sound Is Not Heard from Center
Speaker".
Poor sound• Audio unit
• BOSE speaker amp.
• Speaker
Noisy• Audio unit
• BOSE speaker amp.
• Electrical equipment (generator, bonding wire, etc.)

AV-60
< SERVICE INFORMATION >
TELEPHONE
Terminal and Reference Value for Bluetooth Control Unit
INFOID:0000000003533695
Bluetooth Control Unit Self-Diagnosis FunctionINFOID:0000000003533696
The Bluetooth control unit has two diagnostic checks. The first diagnostic check is performed automatically
every ignition cycle during control unit initialization. The second diagnostic check is performed by the techni-
cian using the steering wheel audio control switches prior to trouble diagnosis.
Te r m i n a l
(Wire color)
ItemSignal
input/
outputCondition
Reference value
(Approx.)Example of symptom
+–Ignition
switchOperation
1 (Y) GroundBattery pow-
erInput – – Battery voltageSystem does not
work properly.
2 (V) Ground ACC power InputACC/
ON– Battery voltageSystem does not
work properly.
3 (G/R) Ground IGN power InputON/
START– Battery voltageSystem does not
work properly.
4 (B) – Ground – – – – –
6–Shield –– – – –
7 (B) 8 (R/L) Mic-in signal Input ON – – –
9 (R/W) 10 (R) Audio out Output – – – –
11 ( B ) – M u t e – – – – –
12 (R/G) GroundRemote
control AInput ONPress MODE
switch Approx. 0V
Steering wheel audio
controls do not func-
tion. Press SEEK UP
switchApprox. 0.75V
Press VOL UP
switchApprox. 2V
Except for above Approx. 5V
13 (G/W) GroundRemote
control BInput ONPress POWER
switch Approx. 0V
Steering wheel audio
controls do not func-
tion. Press SEEK
DOWN switchApprox. 0.75V
Press VOL
DOWN switchApprox. 2V
Except for above Approx. 5V
14 (Y/R) -Remote
control
ground-- - -Steering wheel audio
controls do not func-
tion.
15 (GR) - LED - - - - -
17 (V) - - - - - - -
18 (G/O) - - - - - - -
19 (R/B) - - - - - - -
21 (B) – Ground – – – – –
28 (W/R) –Speed sig-
nal–– – – –
29 (R/W) –Microphone
power–– – – –
33 –Bluetooth
antenna sig-
nalInput – – – –