2006 INFINITI QX56 navigation

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

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
WKIA1192E
Approx. 3.5V or more.
WKIA1770E

NAVIGATION SYSTEMAV-137
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Revision: November 2009 2006 QX56
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.
WKIA1771E
40 - Ground
: Refer to AV- 1 0 2 , "Terminals
and Reference Value for Dis-
play Control unit" .
SKIA4447E
42 - Ground : Refer to AV- 1 0 2 , "Terminals
and Reference Value for Dis-
play Control unit" .
SKIA4448E

AV-138
NAVIGATION SYSTEM
Revision: November 20092006 QX56
Display Communication Line Check (Between Display Control Unit and Display
Unit)
EKS00GEI
1. CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect display unit connector M93 and display control unit connector M95.
3. Check continuity between display control unit and display unit.
4. Check continuity between display control unit and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair harness or connector.
2. CHECK 1: COMMUNICATION SIGNAL (DCU–DSP)
1. Connect display unit connector.
2. Turn ignition switch ON.
3. Check voltage between display unit harness connector M93 ter- minal 11 and ground.
OK or NG
OK >> GO TO 3.
NG >> Replace display unit. Refer to AV- 1 6 7 , "
DISPLAY UNIT"
.
3. CHECK 2: COMMUNICATION SIGNAL (DSP–DCU)
1. Turn ignition switch OFF.
2. Connect display control unit connector M95.
3. Turn ignition switch ON.
4. Check voltage between display control unit harness connector M95 terminal 38 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 Display unit
Connector Terminal Connector Terminal
M95 36
M93 11
Ye s
38 22
Terminals Continuity
Display control unit
—
Connector Terminal
M95 36
GroundNo
38
WKIA2019E
Approx. 3.5V or more.
WKIA1377E
Approx. 3.5V or more.
SKIA4453E

NAVIGATION SYSTEMAV-139
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Revision: November 2009 2006 QX56
4. CHECK 3: COMMUNICATION SIGNAL (DCU–DSP)
Check signal between display control unit harness connector M95
terminal 36 and ground with CONSULT-II or oscilloscope.
OK or NG
OK >> GO TO 5.
NG >> Replace display control unit. Refer to AV- 1 6 7 , "
DISPLAY
CONTROL UNIT" .
5. CHECK 4: COMMUNICATION SIGNAL (DSP–DCU)
Check signal between display control unit harness connector M95
terminal 38 and ground with CONSULT-II or oscilloscope.
OK or NG
OK >> Inspection End.
NG >> Replace display unit. Refer to AV- 1 6 7 , "
DISPLAY UNIT"
.
AV Communication Line Check (Between Display Control Unit and AV Switch)EKS00GEJ
1. CHECK AV SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect display control unit connector M95 and AV switch connector M98.
3. Check continuity between display control unit and AV switch.
4. Check continuity between display control unit and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair harness or connector. 36 - Ground
: Refer to AV- 1 0 2 , "
Terminals
and Reference Value for Dis-
play Control unit" .
SKIA4452E
38 - Ground : Refer to AV- 1 0 2 , "Terminals
and Reference Value for Dis-
play Control unit" .
SKIA4453E
Terminals
Continuity
Display control unit AV switch
Connector Terminal Connector Terminal
M95 28
M98 6
Ye s
30 8
Terminals Continuity
Display control unit
—
Connector Terminal
M95 28
Ground No
30
WKIA1597E

AV-140
NAVIGATION SYSTEM
Revision: November 20092006 QX56
2. CHECK SELF-DIAGNOSIS OF DCU
1. Replace AV switch.
2. Connect display control unit connector and AV switch 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" .
CAN Communication Line CheckEKS00GEK
1. CHECK MONITOR DESCRIPTION
1. Start display control unit self-diagnosis. Refer to AV- 11 2 , "
Self-
Diagnosis Mode (DCU)" .
2. Select “CAN DIAG SUPPORT MONITOR”. Refer to AV- 1 2 4 ,
"CAN DIAG SUPPORT MONITOR" .
3. Record each item display description (OK/NG/UKNWN) displayed on the following CAN DIAG SUPPORT MONITOR Check Sheet.
CAN DIAG SUPPORT MONITOR Check Sheet
>> After filling in CAN DIAG SUPPORT MONITOR Check Sheet, GO TO LAN-26, "
CAN COMMUNI-
CATION" .
If NAVI Control Unit Detects That DVD-ROM Map is Not InsertedEKS00GEL
1. CHECK DVD-ROM
Make sure identified DVD-ROM map is inserted.
OK or NG
OK >> Replace NAVI control unit. Refer to AV- 1 6 8 , "NAVI CONTROL UNIT" .
NG >> Insert identified DVD-ROM map.
Item content
Error counter
Normal condition Error (Example)
CAN_COMM OKNG0-50
CAN_CIRC_1 OKUNKWN 0-50
CAN_CIRC_2 OKUNKWN 0-50
CAN_CIRC_3 OKUNKWN 0-50
CAN_CIRC_4 OKUNKWN 0-50
CAN_CIRC_5 OKUNKWN 0-50
CAN_CIRC_6 OKUNKWN 0-50
CAN_CIRC_7 OKUNKWN 0-50
CAN_CIRC_8 OKUNKWN 0-50
CAN_CIRC_9 OKUNKWN 0-50
SKIA4288E
Diagnosis item Screen displayDiagnosis item Screen display
CAN_COMM OKNG CAN_CIRC_5 OKUNKWN
CAN_CIRC_1 OKUNKWN CAN_CIRC_6 OKUNKWN
CAN_CIRC_2 OKUNKWN CAN_CIRC_7 OKUNKWN
CAN_CIRC_3 OKUNKWN CAN_CIRC_8 OKUNKWN
CAN_CIRC_4 OKUNKWN CAN_CIRC_9 OKUNKWN

NAVIGATION SYSTEMAV-141
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Revision: November 2009 2006 QX56
If NAVI Control Unit Detects That Inserted DVD-ROM Map is Malfunctioning or If
It is Impossible to Load Data from DVD-ROM Map
EKS00GEM
1. CHECK 1: DVD-ROM
Remove inserted DVD-ROM map to check that it is identified.
OK or NG
OK >> GO TO 2.
NG >> Replace identified DVD-ROM map.
2. CHECK 2: DVD-ROM
Check DVD-ROM for dirt, scratches and warpage.
OK or NG
OK >> GO TO 3.
NG >> Replace DVD-ROM map.
3. CHECK 3: DVD-ROM
Insert same DVD-ROM to make sure same diagnosis result is found as last self-diagnosis.
OK or NG
OK >> Replace NAVI control unit. Refer to AV- 1 6 8 , "NAVI CONTROL UNIT" .
NG >> Replace DVD-ROM map.
If Connection Between NAVI Control Unit and GPS Antenna is MalfunctioningEKS00GEN
1. CHECK GPS ANTENNA
Check cable for GPS antenna for damage.
OK or NG
OK >> GO TO 2.
NG >> Replace GPS antenna. Refer to AV- 1 6 7 , "
GPS ANTENNA" .
2. CHECK BY REPLACEMENT OF GPS ANTENNA
Replace with other functional GPS antenna to try self-diagnosis again.
Result of self-diagnosis; Found same result?
YES >> Replace NAVI control unit. Refer to AV- 1 6 8 , "NAVI CONTROL UNIT" .
NO >> Replace GPS antenna. Refer to AV- 1 6 7 , "
GPS ANTENNA" .

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.
WKIA1965E
55 - 49 : Refer to
AV- 1 0 2 , "Terminals and Refer-
ence Value for Display Control unit" .
SKIA4305E
53 - 49 : Refer to AV- 1 0 2 , "Terminals and Refer-
ence Value for Display Control unit" .
WKIA1773E