2007 INFINITI QX56 service

NAVIGATION SYSTEM
AV-119
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
L
MA
B
AV
N
O
P
4. Check continuity between NAVI control unit and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
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-145, "
Removal and Installation".
Audio Communication Line Check (Between Display Control Unit and Audio Unit)
INFOID:0000000003533737
1.CHECK POWER SUPPLY AND GROUND CIRCUIT
1. Check power supply and ground circuit for audio unit. Refer to AV-31, "
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.
Te r m i n a l s
Continuity BA
Connector Terminal Connector Terminal
NAVI control
unit: B15269
Display control
unit: M9532
Ye s
70 34
Te r m i n a l s
Continuity B
—
Connector Terminal
NAVI control unit:
B15269
Ground No
70
WKIA4214E
Te r m i n a l s
Continuity Display control unit Audio unit
Connector Terminal Connector Terminal
M9540
M4565
Ye s
42 66
Te r m i n a l s
Continuity Display control unit
—
Connector Terminal
M9540
Ground No
42
WKIA1192E

AV-120
< SERVICE INFORMATION >
NAVIGATION SYSTEM
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-145, "
Removal
and Installation".
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-46, "
Removal and
Installation".
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-145, "
Removal
and Installation".
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-46, "
Removal and
Installation". Approx. 3.5V or more.
WKIA1770E
Approx. 3.5V or more.
WKIA1771E
40 - Ground : Refer to AV-91, "Terminal
and Reference Value for Dis-
play Control unit".
SKIA4447E
42 - Ground : Refer to AV-91, "Terminal
and Reference Value for Dis-
play Control unit".
SKIA4448E

NAVIGATION SYSTEM
AV-121
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
L
MA
B
AV
N
O
P
Display Communication Line Check (Between Display Control Unit and Display Unit)
INFOID:0000000003533738
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-145, "
Removal and
Installation".
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-145, "
Removal
and Installation".
4.CHECK 3: COMMUNICATION SIGNAL (DCU–DSP)
Te r m i n a l s
Continuity Display control unit Display unit
Connector Terminal Connector Terminal
M9536
M9311
Ye s
38 22
Te r m i n a l s
Continuity Display control unit
—
Connector Terminal
M9536
Ground No
38
WKIA2019E
Approx. 3.5V or more.
WKIA1377E
Approx. 3.5V or more.
SKIA4453E

AV-122
< SERVICE INFORMATION >
NAVIGATION SYSTEM
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-145, "
Removal
and Installation".
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-145, "
Removal and
Installation".
AV Communication Line Check (Between Display Control Unit and AV Switch)
INFOID:0000000003533739
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.
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
36 - Ground : Refer to AV-91, "Terminal
and Reference Value for Dis-
play Control unit".
SKIA4452E
38 - Ground : Refer to AV-91, "Terminal
and Reference Value for Dis-
play Control unit".
SKIA4453E
Te r m i n a l s
Continuity Display control unit AV switch
Connector Terminal Connector Terminal
M9528
M986
Ye s
30 8
Te r m i n a l s
Continuity Display control unit
—
Connector Terminal
M9528
Ground No
30
WKIA1597E

NAVIGATION SYSTEM
AV-123
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
L
MA
B
AV
N
O
P
OK >> Inspection End.
NG >> Replace display control unit. Refer to AV-145, "
Removal and Installation".
CAN Communication Line CheckINFOID:0000000003533740
1.CHECK MONITOR DESCRIPTION
1. Start display control unit self-diagnosis. Refer to AV-98, "
Self-
Diagnosis Mode (DCU)".
2. Select “CAN DIAG SUPPORT MONITOR”. Refer to AV-109,
"CAN Diagnostic 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-40.
If NAVI Control Unit Detects That DVD-ROM Map Is Not InsertedINFOID:0000000003533741
1.CHECK DVD-ROM
Make sure identified DVD-ROM map is inserted.
OK or NG
OK >> Replace NAVI control unit. Refer to AV-145, "Removal and Installation".
NG >> Insert identified DVD-ROM map.
If NAVI Control Unit Detects That Inserted DVD-ROM Map Is Malfunctioning or If It Is
Impossible to Load Data from DVD-ROM Map
INFOID:0000000003533742
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.
Item content
Error counter
Normal condition Error (Example)
CAN_COMM OK NG 0-50
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
SKIA4288E
Diagnosis item Screen display Diagnosis item Screen display
CAN_COMM OK NG CAN_CIRC_5 OK UNKWN
CAN_CIRC_1 OK UNKWN CAN_CIRC_6 OK UNKWN
CAN_CIRC_2 OK UNKWN CAN_CIRC_7 OK UNKWN
CAN_CIRC_3 OK UNKWN CAN_CIRC_8 OK UNKWN
CAN_CIRC_4 OK UNKWN CAN_CIRC_9 OK UNKWN

AV-124
< SERVICE INFORMATION >
NAVIGATION SYSTEM
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-145, "Removal and Installation".
NG >> Replace DVD-ROM map.
If Connection Between NAVI Control Unit and GPS Antenna Is Malfunctioning
INFOID:0000000003533743
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-145, "
Removal and Installation".
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-145, "Removal and Installation".
NO >> Replace GPS antenna. Refer to AV-145, "
Removal and Installation".
Operating Screen for Audio and A/C Is Not Displayed When Showing NAVI Screen
INFOID:0000000003533744
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 SIGNALContinuity should exist.
Continuity should not exist.
WKIA1965E

NAVIGATION SYSTEM
AV-125
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
L
MA
B
AV
N
O
P
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-145, "
Removal and
Installation".
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-145, "
Removal and
Installation".
4.CHECK RGB AREA SIGNAL
1. Press the “TRIP” button.
2. Check signal between display control unit connector M95 termi-
nals 51 and 49 with CONSULT-ll or oscilloscope.
OK or NG
OK >> Replace display unit. Refer to AV-145, "Removal and
Installation".
NG >> Replace display control unit. Refer to AV-145, "
Removal
and Installation".
Color of RGB Image Is Not Proper (Only NAVI Screen Looks Bluish)INFOID:0000000003533745
1.CHECK RGB 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.
•When the screen looks bluish.55 - 49 : Refer to AV-91, "
Terminal and Reference
Value for Display Control unit".
SKIA4305E
53 - 49 : Refer to AV-91, "Terminal and Reference
Value for Display Control unit".
WKIA1773E
51 - 49 : Refer to AV-91, "Terminal and Reference
Value for Display Control unit".
SKIA4306E
Te r m i n a l s
Continuity BA
Connector Terminal Connector Terminal
NAVI control
unit: B15244
Display control
unit: M9544
Ye s
47 45
WKIA4215E

AV-126
< SERVICE INFORMATION >
NAVIGATION SYSTEM
OK or NG
OK >> GO TO 2.
NG >> Repair harness or connector.
2.CHECK RGB SIGNAL
1. Connect NAVI control unit connector and display control unit
connector.
2. Turn ignition switch ON.
3. Display “Color bar” by “CONFIRMATION/ADJUSTMENT” mode.
4. Check signal between NAVI control unit connector B152 termi-
nal 44 and 47 with CONSULT-ll or oscilloscope.
•When the screen looks bluish.
Voltage signal between NAVI control unit connector B152 terminal
44 and 47.
OK or NG
OK >> Replace display control unit. Refer to AV-145, "Removal and Installation".
NG >> Replace NAVI control unit. Refer to AV-145, "
Removal and Installation".
Color of RGB Image Is Not Proper (Only NAVI Screen Looks Reddish)INFOID:0000000003533746
1.CHECK RGB 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.
•When the screen looks reddish.
OK or NG
OK >> GO TO 2.
NG >> Repair harness or connector.
2.CHECK RGB SIGNAL
Terminals
Continuity B
—
Connector Terminal
NAVI control unit:
B15244
Ground No
47
44 - 47 : Refer to AV-89, "Terminal
and Reference Value for
NAVI Control Unit".
WKIA4216E
Te r m i n a l s
Continuity BA
Connector Terminal Connector Terminal
NAVI control
unit: B15245 Display control
unit:
M9546
Ye s
47 45
Te r m i n a l s
Continuity B
—
Connector Terminal
NAVI control unit:
B15245
Ground No
47
WKIA4217E