2006 INFINITI QX56 audio

AV-112
NAVIGATION SYSTEM
Revision: November 20092006 QX56
Self-Diagnosis Mode (DCU)EKS00GDZ
OPERATION PROCEDURE
1. Start the engine.
2. Turn the audio system off.
3. While pressing the “MEMORY 4” button, turn the volume control
dial clockwise or counterclockwise for 30 clicks or more. (When
the self-diagnosis mode is started, a short beep will be heard.)

Shifting from current screen to previous screen is performed
by pressing “BACK” button.
4. The initial self-diagnosis screen will be shown, and items “Self- Diagnosis (DCU) ”, “Self-Diagnosis (NAVI) ”, “Confirmation/
Adjustment” and “CAN DIAG SUPPORT MONITOR ” will
become selective.
5. Perform self-diagnosis by selecting the “Self-Diagnosis”.

Self-diagnosis subdivision screen will be shown and the oper-
ation enters the self-diagnosis mode.

A bar graph shown below the self-diagnosis subdivision
screen indicates progress of the diagnosis.
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NAVIGATION SYSTEMAV-113
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Revision: November 2009 2006 QX56
6. When the self-diagnosis completes, optional part confirmation
screen will be shown.

When connection of an optional part is judged error, a screen
to check if the optional part is actually fitted on the vehicle or
not will be shown. When fitted, select the switch of the part on
the screen and press “End”. Then the “SELF DIAGNOSIS”
screen will be shown.

When the optional part is connected normally, the switch for
the part will not appear on the screen.
7. On the “SELF DIAGNOSIS ” screen, each unit name will be col-
ored according to the diagnosis result, as follows.

If several malfunctions are present in a unit, color of its switch
on the screen will be either red, yellow, or gray, determined by
the malfunction of the highest priority.
8. Select a switch on the “SELF DIAGNOSIS ” screen and com-
ments for the diagnosis results will be shown.

When the switch is green, the following comment will be
shown. “Self-diagnosis was successful. Further diagnosis and
adjustments are recommended. Follow the “confirmation/
adjustment ” menu or refer to the service manual. ”

When the switch is yellow, the following comment will be
shown. “Connection to the following unit is abnormal. See the
service manual for further details ”.

When the switch is red, the following comment will be shown.
“DCU is abnormal”.
SELF–DIAGNOSIS RESULT
Quick reference table
1. Select a malfunctioning diagnosis No. in the diagnosis result quick reference table.
2. Find estimated malfunctioning system in the diagnosis No. table and perform check by referring to AV- 9 7 ,
"Wiring Diagram — COMM —" .
3. Turn the ignition switch OFF and perform self-diagnosis again.
*: DCU = Display control unit
CAUTION:

When AV switch has a malfunction, you cannot start. Refer to AV- 1 5 5 , "Unable to Operate All of AV
Switches (Unable to Start Self-Diagnosis)" .

When display unit has a malfunction, you cannot start. Refer to AV- 1 5 3 , "Screen is Not Shown" .
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Green : Not malfunctioning.
Yellow : Cannot be judged by self-diagnosis results.
Red : Unit is malfunctioning.
Gray : Diagnosis has not been done.
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Screen switch
Diagnosis No.
Switch color DCU* DISPLAY Audio unit Navigation GPS
antenna
Red × 1
Gray ×
x2
xx 3
×× ×4

AV-114
NAVIGATION SYSTEM
Revision: November 20092006 QX56
Self-Diagnosis Codes
Self-Diagnosis Mode (NAVI)EKS00GE0
OPERATION PROCEDURE
1. Start the engine.
2. Turn the audio system off.
3. While pressing the “MEMORY 4” button, turn the volume control
dial clockwise or counterclockwise for 30 clicks or more. (When
the self-diagnosis mode is started, a short beep will be heard.)

Shifting from current screen to previous screen is performed
by pressing “BACK” button.
4. The initial self-diagnosis screen will be shown, and items “Self- Diagnosis (DCU) ”, “Self-Diagnosis (NAVI) ”, “Confirmation/
Adjustment” and “CAN DIAG SUPPORT MONITOR ” will
become selective.
Diagnosis
No. Possible cause
Reference
page
1 Display control unit malfunction Refer to AV-167
.
2 Display communication line between display control unit and display unit Refer to AV-138
.
3 Audio unit power supply and ground circuit
Audio communication line between display control unit and audio unit
Refer to
AV-136
.
4 NAVI control unit power supply and ground circuit
AV communication line between display control unit and NAVI control unit Refer to AV-135
.
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NAVIGATION SYSTEMAV-117
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Revision: November 2009 2006 QX56
Confirmation/Adjustment ModeEKS00GE1
OPERATION PROCEDURE
1. Start the engine.
2. Turn the audio system off.
3. While pressing the “MEMORY 4” button, turn the volume control
dial clockwise or counterclockwise for 30 clicks or more. (When
the self-diagnosis mode is started, a short beep will be heard.)

Shifting from current screen to previous screen is performed
by pressing “BACK” button.
4. The initial self-diagnosis screen will be shown, and items “Self-
Diagnosis (DCU) ”, “Self-Diagnosis (NAVI) ”, “Confirmation/
Adjustment ” and “CAN DIAG SUPPORT MONITOR ” will
become selective.
5. When “Confirmation/Adjustment ” is selected on the initial self-
diagnosis screen, the operation will enter the CONFIRMATION/
ADJUSTMENT mode. In this mode, check and adjustment of
each item will become possible.
6. The initial trouble diagnosis screen will be shown, and items “Display Diagnosis ”, “Vehicle Signals ”, “Auto Climate Control ”
and “Navigation ” will become selective.
7. Select each switch on “CONFIRMATION/ADJUSTMENT ”
screen to display the relevant diagnosis screen.
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AV-124
NAVIGATION SYSTEM
Revision: November 20092006 QX56
CAN DIAG SUPPORT MONITOREKS00GE2
OPERATION PROCEDURE
1. Start the engine.
2. Turn the audio system off.
3. While pressing the “MEMORY 4” button, turn the volume control
dial clockwise or counterclockwise for 30 clicks or more. (When
the self-diagnosis mode is started, a short beep will be heard.)

Shifting from current screen to previous screen is performed
by pressing “BACK” button.
4. The initial self-diagnosis screen will be shown, and items “Self- Diagnosis (DCU) ”, “Self-Diagnosis (NAVI) ”, “Confirmation/
Adjustment” and “CAN DIAG SUPPORT MONITOR ” will
become selective.
5. Select “CAN DIAG SUPPORT MONITOR ”.
6. Display status of CAN communication.

If the ignition is turned on and UNKWN is shown on the screen, the value of the counter will be up.
(MAX50)

The value of the counter does not change if the ignition changes to OFF. (MAX50)

If the counter shows the value of 50 and UNKWN is shown, the value of 50 will not be changed.
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Item ContentError counter
CAN_COMM OK/NG0-50
CAN_CIRC_1 OK/UNKWN 0-50
CAN_CIRC_2 OK/UNKWN 0-50
CAN_CIRC_3 OK/UNKWN 0-50
CAN_CIRC_4 OK/UNKWN 0-50
CAN_CIRC_5 OK/UNKWN 0-50
CAN_CIRC_6 OK/UNKWN 0-50
CAN_CIRC_7 OK/UNKWN 0-50
CAN_CIRC_8 OK/UNKWN 0-50
CAN_CIRC_9 OK/UNKWN 0-50
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AV-136
NAVIGATION SYSTEM
Revision: November 20092006 QX56
3. CHECK SELF-DIAGNOSIS OF DCU
1. Replace NAVI control unit.
2. Connect NAVI control unit connector and display control unit connector.
3. Turn ignition switch ON.
4. Start self-diagnosis of DCU and check the self-diagnosis result.
OK or NG
OK >> Inspection End.
NG >> Replace display control unit. Refer to AV- 1 6 7 , "
DISPLAY CONTROL UNIT" .
Audio Communication Line Check (Between Display Control Unit and Audio
Unit)
EKS00GEH
1. CHECK POWER SUPPLY AND GROUND CIRCUIT
1. Check power supply and ground circuit for audio unit. Refer to AV- 3 5 , "
Power Supply Circuit Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Check the malfunctioning parts.
2. CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect audio unit connector M45 and display control unit connector M95.
3. Check continuity between audio unit and display control unit.
4. Check continuity between display control unit and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3. CHECK 1: AUDIO-TX COMMUNICATION SIGNAL
1. Connect display control unit connector.
2. Turn ignition switch ON.
3. Check voltage between display control unit harness connector M95 terminal 42 and ground.
OK or NG
OK >> GO TO 4.
NG >> Replace display control unit. Refer to AV- 1 6 7 , "
DISPLAY
CONTROL UNIT" .
Terminals
Continuity
Display control unit Audio unit
Connector Terminal Connector Terminal
M95 40
M45 65
Ye s
42 66
Terminals Continuity
Display control unit
—
Connector Terminal
M95 40
GroundNo
42
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Approx. 3.5V or more.
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NAVIGATION SYSTEMAV-137
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4. CHECK 2: AUDIO-RX COMMUNICATION SIGNAL
1. Turn ignition switch OFF.
2. Disconnect display control unit connector M95.
3. Connect audio unit connector M45.
4. Turn ignition switch ON.
5. Check voltage between audio unit harness connector M45 ter- minal 65 and ground.
OK or NG
OK >> GO TO 5.
NG >> Replace audio unit. Refer to AV- 5 5 , "
AUDIO UNIT" .
5. CHECK 3: AUDIO-TX COMMUNICATION SIGNAL
Check signal between display control unit harness connector M95
terminal 40 and ground with CONSULT-ll or oscilloscope.
OK or NG
OK >> GO TO 6.
NG >> Replace display control unit. Refer to AV- 1 6 7 , "
DISPLAY
CONTROL UNIT" .
6. CHECK 4: AUDIO-RX COMMUNICATION SIGNAL
1. Turn ignition switch ON.
2. Check signal between display control unit harness connector M95 terminal 42 and ground with CONSULT-ll or oscilloscope.
OK or NG
OK >> Inspection End.
NG >> Replace audio unit. Refer to AV- 5 5 , "
AUDIO UNIT" .
Approx. 3.5V or more.
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40 - Ground
: Refer to AV- 1 0 2 , "Terminals
and Reference Value for Dis-
play Control unit" .
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42 - Ground : Refer to AV- 1 0 2 , "Terminals
and Reference Value for Dis-
play Control unit" .
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AV-142
NAVIGATION SYSTEM
Revision: November 20092006 QX56
Operating Screen for Audio and A/C is Not Displayed When Showing NAVI
Screen
EKS00GEO
1. CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect display control unit connector M95 and display unit connector M93.
3. Check continuity between display control unit harness connector M95 terminal 49, 51, 53, 55 and display unit harness connector
M93 terminal 21, 9, 20, 8.
4. Check continuity between display control unit harness connector M95 terminal 49, 51, 53, 55 and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair harness.
2. CHECK HORIZONTAL SYNCHRONIZATION SIGNAL
1. Connect display control unit connector and display unit connec- tor.
2. Turn ignition switch ON.
3. Check signal between display control unit connector M95 termi- nals 55 and 49 with CONSULT-ll or oscilloscope.
OK or NG
OK >> GO TO 3.
NG >> Replace display unit. Refer to AV- 1 6 7 , "
DISPLAY UNIT"
.
3. CHECK VERTICAL SYNCHRONIZATION SIGNAL
1. Turn ignition switch ON.
2. Check signal between display control unit connector M95 termi- nals 53 and 49 with CONSULT-ll or oscilloscope.
OK or NG
OK >> GO TO 4.
NG >> Replace display unit. Refer to AV- 1 6 7 , "
DISPLAY UNIT"
.
Continuity should exist.
Continuity should not exist.
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55 - 49 : Refer to
AV- 1 0 2 , "Terminals and Refer-
ence Value for Display Control unit" .
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53 - 49 : Refer to AV- 1 0 2 , "Terminals and Refer-
ence Value for Display Control unit" .
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