2005 INFINITI QX4 display

AV-126
NAVIGATION SYSTEM
Revision: October 20052005 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 5 8 , "
Removal and Installation of Display Control Unit" .
Audio Communication Line Check (Between Display Control Unit and Audio
Unit)
EKS00BK8
1. CHECK POWER SUPPLY AND GROUND CIRCUIT
1. Check power supply and ground circuit for audio unit. Refer to AV- 3 0 , "
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.
Te r m i n a l s
Continuity Display control unit Audio unit
ConnectorTerminal
(Wire color)ConnectorTe r m i n a l
(Wire color)
M9540 (O/L)
M4565 (O/L)
Ye s
42 (W/L) 66 (W/L)
Te r m i n a l s
Continuity Display control unit
—
Connector Terminal (Wire color)
M9540 (O/L)
Ground No
42 (W/L)
WKIA1192E

NAVIGATION SYSTEM
AV-127
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Revision: October 20052005 QX56
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 (W/L) and ground.
OK or NG
OK >> GO TO 4.
NG >> Replace display control unit. Refer to AV-158, "
Removal
and Installation of Display Control Unit" .
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 (O/L) and ground.
OK or NG
OK >> GO TO 5.
NG >> Replace audio unit. Refer to AV- 4 5 , "
Removal and
Installation for Audio Unit" .
5. CHECK 3: AUDIO-TX COMMUNICATION SIGNAL
1. Turn ignition switch OFF.
2. Connect display control unit connector M95.
3. Turn ignition switch ON.
4. Check signal between display control unit harness connector
M95 terminal 40 (O/L) and ground with CONSULT-II or oscillo-
scope.
OK or NG
OK >> GO TO 6.
NG >> Replace display control unit. Refer to AV-158, "
Removal
and Installation of Display Control Unit" . Approx. 3.5V or more.
WKIA1770E
Approx. 3.5V or more.
WKIA1771E
40 (O/L) - Ground : Refer to AV- 9 2 , "Terminals
and Reference Value for Dis-
play Control unit" .
SKIA4447E

AV-128
NAVIGATION SYSTEM
Revision: October 20052005 QX56
6. CHECK 4: AUDIO-RX COMMUNICATION SIGNAL
1. Turn ignition switch ON.
2. Check signal between display control unit harness connector
M95 terminal 42 (W/L) and ground with CONSULT-II or oscillo-
scope.
OK or NG
OK >> Inspection End.
NG >> Replace audio unit. Refer to AV- 4 5 , "
Removal and
Installation for Audio Unit" .
Display Communication Line Check (Between Display Control Unit and Display
Unit)
EKS00BK9
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 (B/W) and ground.
OK or NG
OK >> GO TO 3.
NG >> Replace display unit. Refer to AV- 1 5 8 , "
Removal and
Installation of Display Unit" . 42 (W/L) - Ground : Refer to AV-92, "
Te r m i na l s
and Reference Value for Dis-
play Control unit" .
SKIA4448E
Te r m i n a l s
Continuity Display control unit Display unit
ConnectorTerminal
(Wire color)ConnectorTe r m i n a l
(Wire color)
M9536 (B/W)
M9311 (B/W)
Ye s
38 (L) 22 (L)
Te r m i n a l s
Continuity Display control unit
—
Connector Terminal (Wire color)
M9536 (B/W)
Ground No
38 (L)
WKIA2019E
Approx. 3.5V or more.
WKIA1377E

NAVIGATION SYSTEM
AV-129
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Revision: October 20052005 QX56
3. CHECK 2: COMMUNICATION SIGNAL (DSP–DCU)
1. Turn ignition switch OFF.
2. Disconnect display control unit connector M95.
3. Connect display control unit connector.
4. Turn ignition switch ON.
5. Check voltage between display control unit harness connector
M95 terminal 38 (L) and ground.
OK or NG
OK >> GO TO 4.
NG >> Replace display control unit. Refer to AV-158, "
Removal
and Installation of Display Control Unit" .
4. CHECK 3: COMMUNICATION SIGNAL (DCU–DSP)
1. Turn ignition switch OFF.
2. Connect display unit connector.
3. Turn ignition switch ON.
4. Check signal between display control unit harness connector
M95 terminal 36 (B/W) and ground with CONSULT-II or oscillo-
scope.
OK or NG
OK >> GO TO 5.
NG >> Replace display control unit. Refer to AV-158, "
Removal
and Installation of Display Control Unit" .
5. CHECK 4: COMMUNICATION SIGNAL (DSP–DCU)
1. Turn ignition switch ON.
2. Check signal between display control unit harness connector
M95 terminal 38 (L) and ground with CONSULT-II or oscillo-
scope.
OK or NG
OK >> Inspection End.
NG >> Replace display unit. Refer to AV-158, "
Removal and
Installation of Display Unit" . Approx. 3.5V or more.
SKIA4453E
36 (B/W) – Ground : Refer to AV- 9 2 , "Terminals
and Reference Value for Dis-
play Control unit" .
SKIA4452E
38 (L) – Ground : Refer to AV- 9 2 , "Terminals
and Reference Value for Dis-
play Control unit" .
SKIA4453E

AV-130
NAVIGATION SYSTEM
Revision: October 20052005 QX56
AV Communication Line Check (Between Display Control Unit and AV Switch)EKS00BKA
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
OK >> Inspection End.
NG >> Replace display control unit. Refer to AV- 1 5 8 , "
Removal and Installation of Display Control Unit" .
Te r m i n a l s
Continuity Display control unit AV switch
ConnectorTerminal
(Wire color)ConnectorTe r m i n a l
(Wire color)
M9528 (V)
M986 (V)
Ye s
30 (LG) 8 (LG)
Te r m i n a l s
Continuity Display control unit
—
Connector Terminal (Wire color)
M9528 (V)
Ground No
30 (LG)
WKIA1597E

NAVIGATION SYSTEM
AV-131
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Revision: October 20052005 QX56
CAN Communication Line CheckEKS00BKB
1. CHECK MONITOR DESCRIPTION
1. Start display control unit self-diagnosis. Refer to AV- 1 0 1 , "
Self-Diagnosis Mode (DCU)" .
2. Select “CAN DIAG SUPPORT MONITOR”. Refer to AV- 11 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-5, "
CAN COMMUNI-
CATION" .
If NAVI Control Unit Detects That DVD-ROM Map is Not InsertedEKS00BKC
1. CHECK DVD-ROM
1. Make sure identified DVD-ROM map is inserted.
OK or NG
OK >> Replace NAVI control unit. Refer to AV-157, "Removal and Installation of NAVI Control Unit" .
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
EKS00BKD
1. CHECK 1: DVD-ROM
1. 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-132
NAVIGATION SYSTEM
Revision: October 20052005 QX56
2. CHECK 2: DVD-ROM
1. 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
1. 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 5 7 , "Removal and Installation of NAVI Control Unit" .
NG >> Replace DVD-ROM map.
If Connection Between NAVI Control Unit and GPS Antenna is MalfunctioningEKS00BKE
1. CHECK GPS ANTENNA
1. Check cable for GPS antenna for damage.
OK or NG
OK >> GO TO 2.
NG >> Replace GPS antenna. Refer to AV- 1 5 7 , "
Removal and Installation of GPS Antenna" .
2. CHECK BY REPLACEMENT OF GPS ANTENNA
1. Replace 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 5 7 , "Removal and Installation of NAVI Control Unit" .
NO >> Replace GPS antenna. Refer to AV- 1 5 7 , "
Removal and Installation of GPS Antenna" .
Operating Screen for Audio and A/C is Not Displayed When Showing NAVI
Screen
EKS00BKF
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 (B), 53 (W), 55 (R)
and display unit harness connector M93 terminal 21, 9 (B), 20 (W), 8 (R).
4. Check continuity between display control unit harness connector
M95 terminal 49, 51 (B), 53 (W), 55 (R) and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair harness.Continuity should exist.
Continuity should not exist.
WKIA1965E

NAVIGATION SYSTEM
AV-133
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Revision: October 20052005 QX56
2. CHECK HORIZONTAL SYNCHRONIZATION SIGNAL
1. Connect display control unit connector and display unit connector.
2. Turn ignition switch ON.
3. Check signal between display control unit connector M95 termi-
nals 55 (R) and 49 with CONSULT-II or oscilloscope.
OK or NG
OK >> GO TO 3.
NG >> Replace display unit. Refer to AV-158, "
Removal and
Installation of Display Unit" .
3. CHECK VERTICAL SYNCHRONIZATION SIGNAL
1. Turn ignition switch ON.
2. Check signal between display control unit connector M95 termi-
nals 53 (W) and 49 with CONSULT-II or oscilloscope.
OK or NG
OK >> GO TO 4.
NG >> Replace display unit. Refer to AV-158, "
Removal and
Installation of Display Unit" .
4. CHECK RGB AREA SIGNAL
1. Press the “TRIP” button.
2. Check signal between display control unit connector M95 termi-
nals 51 (B) and 49 with CONSULT-II or oscilloscope.
OK or NG
OK >> Replace display unit. Refer to AV-158, "Removal and
Installation of Display Unit" .
NG >> Replace display control unit. Refer to AV-158, "
Removal
and Installation of Display Control Unit" . 55 (R) - 49 : Refer to AV- 9 2 , "
Terminals and Refer-
ence Value for Display Control unit" .
SKIA4305E
53 (W) - 49 : Refer to AV- 9 2 , "Terminals and Refer-
ence Value for Display Control unit" .
WKIA1773E
51 (B) – 49 : Refer to AV- 9 2 , "Terminals and Refer-
ence Value for Display Control unit" .
SKIA4306E