2006 INFINITI QX56 display

AV-132
NAVIGATION SYSTEM
Revision: November 20092006 QX56
Vehicle Speed Signal Check for Display Control UnitEKS00GE9
1. CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect display control unit connector M94, combination meter connector M24 and NAVI control unit connector B152.
3. Check continuity between display control unit harness connector M94 terminal 16 and combination meter harness connector M24
terminal 29.
4. Check continuity between display control unit harness connector M94 terminal 16 and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair harness.
2. CHECK 1: VEHICLE SPEED SIGNAL
1. Connect display control unit connector.
2. Turn ignition switch ON.
3. Check voltage between display control unit harness connector M94 terminal 16 and ground.
OK or NG
OK >> GO TO 3.
NG >> Replace display control unit. Refer to AV- 1 6 7 , "
DISPLAY
CONTROL UNIT" .
3. CHECK 2: VEHICLE SPEED SIGNAL
1. Connect combination meter connector and NAVI control unit connector.
2. Drive vehicle at a constant speed.
3. Check signal between display control unit harness connector M94 terminal 16 and ground with CONSULT-ll or oscilloscope.
OK or NG
OK >> Replace display control unit. Refer to AV- 1 6 7 , "DISPLAY
CONTROL UNIT" .
NG >> Check combination meter system. Refer to DI-19, "
Vehicle Speed Signal Inspection" .
Continuity should exist.
Continuity should not exist.
WKIA1506E
Approx. 3.5V or more
SKIA4297E
16 - Ground
: Refer to AV- 1 0 2 , "Terminals
and Reference Value for Dis-
play Control unit" .
SKIA4616E

NAVIGATION SYSTEMAV-133
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Revision: November 2009 2006 QX56
Illumination Signal Check for NAVI Control UnitEKS00GEA
1. CHECK ILLUMINATION SIGNAL
1. Turn the ignition switch ON.
2. Check voltage between NAVI control unit and ground.
OK or NG
OK >> Replace NAVI control unit. Refer to AV- 1 6 8 , "NAVI CON-
TROL UNIT" .
NG >> Check harness for open or short between NAVI control unit and IPDM E/R.
Illumination Signal Check for Display Control Unit EKS00GEB
1. CHECK ILLUMINATION SIGNAL
1. Turn ignition switch ON.
2. 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 IPDM E/R.
Ignition Signal Check for NAVI Control UnitEKS00GEC
1. CHECK IGNITION SIGNAL
1. Disconnect NAVI control unit connector B152.
2. Turn ignition switch ON.
3. Check voltage between NAVI control unit harness connector B152 terminal 63 and ground.
OK or NG
OK >> Replace NAVI control unit. Refer to AV- 1 6 8 , "NAVI CON-
TROL UNIT" .
NG >> Check harness for open or short between NAVI control unit and fuse.
Terminals Lighting switch position
(+)
(– )
Connector Terminal 1st or 2nd
position OFF
B152 61 Ground Battery
voltage Approx. 0V
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Terminals
Lighting switch position
(+)
(– )
Connector Terminal 1st or 2nd
position OFF
M94 14GroundBattery
voltage Approx. 0V
SKIA4299E
Battery voltage should exist.
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AV-134
NAVIGATION SYSTEM
Revision: November 20092006 QX56
Ignition Signal Check for Display Control UnitEKS00GED
1. CHECK IGNITION SIGNAL
1. Disconnect display control unit connector M94.
2. Turn ignition switch ON.
3. Check voltage between display control unit harness connector M94 terminal 12 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 con- trol unit and fuse.
Reverse Signal Check for NAVI Control UnitEKS00GEE
1. CHECK REVERSE LAMP
1. Turn ignition switch ON.
2. Place A/T selector lever into R-position. Do back-up lamps come on?
YES or NO
YES >> GO TO 2.
NO >> Check back-up lamp system. Refer to . LT- 1 0 9 , "
BACK-UP LAMP"
2. CHECK REVERSE SIGNAL
1. Disconnect NAVI control unit connector B152.
2. Turn ignition switch ON.
3. With the A/T selector lever in R-position, check voltage between NAVI control unit and ground.
OK or NG
OK >> Replace NAVI control unit. Refer to AV- 1 6 8 , "NAVI CONTROL UNIT" .
NG >> Check harness for open or short between NAVI control unit and back-up lamp position relay.
Reverse Signal Check for Display Control UnitEKS00GEF
1. CHECK REVERSE LAMP
1. Turn ignition switch ON.
2. Place A/T selector lever into R-position. Do back-up lamps come on?
YES or NO
YES >> GO TO 2.
NO >> Check back-up lamp system. Refer to LT- 1 0 9 , "
BACK-UP LAMP" .
Battery voltage should exist.
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Terminals
Selector lever position
(+)
(– )
Connector Terminal R-positionOther than R-
position
B152 65 Ground Battery voltage Approx. 0V
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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
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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
WKIA1192E
Approx. 3.5V or more.
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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.
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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.
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Approx. 3.5V or more.
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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
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