2007 INFINITI QX56 ignition

NAVIGATION SYSTEM
AV-105
< SERVICE INFORMATION >
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• If vehicle speed is NG, refer to AV-115, "Vehicle Speed Signal Inspection for Display Control Unit".
• If light is NG, refer to AV-116, "
Illumination Signal Inspection for Display Control Unit".
• If IGN is NG, refer to AV-117, "
Ignition Signal Inspection for Display Control Unit".
• If reverse is NG, refer to AV-118, "
Reverse Signal Inspection for Display Control Unit".
NAVIGATION
1. The initial confirmation/adjustment screen will be shown, and
items “Display Diagnosis”, “Vehicle Signals”, “Navigation”,
"Error History“ and "Delete Unit Connection Log” will become
selective.
2. Select each switch on “CONFIRMATION/ADJUSTMENT”
screen to display the relevant diagnosis screen.
DISPLAY DIAGNOSIS
• When RGB signal error occurred in the RGB system, tone of the color bar will change as follows.
• When the color of the screen looks unusual, refer to AV-125, "
Color of RGB Image Is Not Proper (Only NAVI
Screen Looks Bluish)", AV-126, "Color of RGB Image Is Not Proper (Only NAVI Screen Looks Reddish)" and
AV-127, "
Color of RGB Image Is Not Proper (Only NAVI Screen Looks Yellowish)".
VEHICLE SIGNALS
LightON Lighting switch ON
–
OFF Lighting switch OFF
IGNON Ignition switch ON
–
OFF Ignition switch ACC
ReverseON Selector lever in R position
Changes in indication may be delayed by ap-
prox. 1.5 seconds. This is normal. OFF Selector lever in other than R position
– Ignition switch in ACC position Diagnosis item Display Condition Remarks
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R (red) signal error : Screen looks bluish
G (green) signal error : Screen looks reddish
B (blue) signal error : Screen looks yellowish

AV-106
< SERVICE INFORMATION >
NAVIGATION SYSTEM
• A comparison check can be made of each actual vehicle signal
and the signals recognized by the system.
CAUTION:
In case of confirming light signal, set D/N mode to ON/OFF of
light switch (normal setting).
• OFF: D (Day mode)
• ON: N (Night mode)
Unless mode is in above setting, light signal (ON/OFF) may
not be accurately displayed.
• If vehicle speed is NG, refer to AV-114, "
Vehicle Speed Signal Inspection for NAVI Control Unit".
• If light is NG, refer to AV-116, "
Illumination Signal Inspection for NAVI Control Unit".
• If IGN is NG, refer to AV-117, "
Ignition Signal Inspection for NAVI Control Unit".
• If reverse is NG, refer to AV-117, "
Reverse Signal Inspection for NAVI Control Unit".
ERROR HISTORY
DIAGNOSIS BY ERROR HISTORY
The “Self-diagnosis” results indicate whether an error occurred during the period from when the ignition switch
is turned to ON until “Self-diagnosis” is completed.
If an error occurred before the ignition switch was turned to ON and does not occur again until the “Self-diag-
nosis” is completed, the diagnosis result will be judged normal. Therefore, those errors in the past which can-
not be found by the “Self-diagnosis” must be found by diagnosing the “Error History”.
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Diagnosis item Display Condition Remarks
Vehicle speedON Vehicle speed > 0 km/h (0 MPH)
Changes in indication may be delayed by ap-
prox. 1.5 seconds. This is normal. OFF Vehicle speed = 0 km/h (0 MPH)
– Ignition switch in ACC position
LightsON Lighting switch ON
–
OFF Lighting switch OFF
IgnitionON Ignition switch ON
–
OFF Ignition switch ACC
ReverseON Selector lever in R position
Changes in indication may be delayed by ap-
prox. 1.5 seconds. This is normal. OFF Selector lever in other than R position
– Ignition switch in ACC position
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NAVIGATION SYSTEM
AV-107
< SERVICE INFORMATION >
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The Error History displays the time and place of the most recent occurrence of that error. However, take note
of the following points.
• Correct time of the error occurrence may not be displayed when the GPS antenna substrate within the NAVI
control unit has malfunctioned.
• Place of the error occurrence is represented by the position of the current-location mark at the time when the
error occurred. If the current-location mark has deviated from the correct position, then the place of the error
occurrence may be located correctly.
• The maximum number of occurrences which can be stored is 50. For the 51st and later occurrences, the dis-
played number remains 50.
When a reproducible malfunction occurred but its cause cannot be identified because several errors are
present, record the item, number and place (longitude/latitude) of error occurrence (or delete the Error His-
tory), then turn the ignition switch from OFF to ON to reproduce the malfunction. Check the Error History to
find the items which show an increased number of occurrences, and diagnose the item.
Error itemPossible causes
Example of symptom
Action/symptom
Gyro sensor
disconnectedCommunications malfunction between NAVI control unit and inter-
nal gyro.
• Navigation location detection performance has
deteriorated.
(Angular velocity cannot be detected.) • Perform self-diagnosis.
• When the NAVI control unit is judged normal by self-diagnosis,
the symptom may be intermittent, caused by strong radio interfer-
ence.
GPS discon-
nectedCommunication error between NAVI control unit and internal GPS
substrate.• Navigation location detection performance has
deteriorated.
(Location correction using GPS is not per-
formed.)
• GPS receiving status remains gray. • Perform self-diagnosis.
• When the NAVI control unit is judged normal by self-diagnosis,
the symptom may be intermittent, caused by strong radio interfer-
ence.
GPS trans-
mission ca-
ble
malfunctionMalfunctioning transmission wires to NAVI control unit and internal
GPS substrate.
• During self-diagnosis, GPS diagnosis is not
performed. • Perform self-diagnosis.
• When the NAVI control unit is judged normal by self-diagnosis,
the symptom may be intermittent, caused by strong radio interfer-
ence.
GPS input
line connec-
tion errorMalfunctioning receiving wires to NAVI control unit and internal
GPS substrate.• Navigation location detection performance has
deteriorated.
(Location correction using GPS is not per-
formed.)
• GPS receiving status remains gray. • Perform self-diagnosis.
• When the NAVI control unit is judged normal by self-diagnosis,
the symptom may be intermittent, caused by strong radio interfer-
ence.
GPS TCX0
over
GPS TCX0
underOscillating frequency of the GPS substrate frequency synchronizing
oscillation circuit exceeded (or below) the specification
• Navigation location detection performance has
deteriorated.
(Location correction using GPS is not per-
formed.)
• GPS receiving status remains gray. • Perform self-diagnosis.
• When the NAVI control unit is judged normal by self-diagnosis,
the symptom may be intermittent, caused by strong radio interfer-
ence, or the control unit may have been subjected to excessively
high or low temperatures.
GPS ROM
malfunction
GPS RAM
malfunctionContents of ROM (or RAM) in GPS substrate are malfunctioning. • Location detection accuracy of the navigation
system will deteriorate, depending on the error
area in the memory, because GPS cannot
make correct positioning.
(Location correction using GPS is not per-
formed.) • Perform self-diagnosis.
• When the NAVI control unit is judged normal by self-diagnosis,
the symptom may be intermittent, caused by strong radio interfer-
ence.

AV-110
< SERVICE INFORMATION >
NAVIGATION SYSTEM
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.
AV Switch Self-Diagnosis FunctionINFOID:0000000003533723
Refer to AV-28, "AV Switch Self-Diagnosis Function".
Power Supply and Ground Circuit Inspection for NAVI Control UnitINFOID:0000000003533724
1.CHECK FUSE
Make sure the following fuses of the NAVI control unit are not blown.
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of blown fuse before installing new fuse. Refer to PG-
3.
2.CHECK POWER SUPPLY CIRCUIT
1. Disconnect NAVI control unit connector B151.
2. Check voltage between connector terminals and ground as fol-
lows.
OK or NG
OK >> GO TO 3.
NG >> Check harness for open between NAVI control unit and fuse.
3.CHECK GROUND CIRCUIT
Item Content Error counter
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
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Te r m i n a l s
Power source Fuse No.
Connector Terminal
B1512 Battery power 31
5 ACC/ON power 4
Terminals Ignition switch position
(+)
(–) OFF ACC ON
Connector Terminal
B1512
GroundBattery
voltageBattery
voltageBattery
voltage
50VBattery
voltageBattery
voltage
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NAVIGATION SYSTEM
AV-111
< SERVICE INFORMATION >
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1. Turn ignition switch OFF.
2. Check continuity between the following NAVI control unit con-
nector terminals and ground.
OK or NG
OK >> Inspection End.
NG >> Repair or replace harness.
Power Supply and Ground Circuit Inspection for Display Control UnitINFOID:0000000003533725
1.CHECK FUSE
Make sure the following fuses of the display control unit are not blown.
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of blown fuse before installing new fuse. Refer to PG-
3 .
2.CHECK POWER SUPPLY CIRCUIT
1. Disconnect display control unit connector M94.
2. Check voltage between connector terminals and ground as fol-
lows.
OK or NG
OK >> GO TO 3.
NG >> Check harness for open between display control unit and fuse.
3.CHECK GROUND CIRCUIT
Check continuity between the following display control unit connec-
tor terminals and ground.
OK or NG
OK >> Inspection End.
NG >> Repair or replace harness.
Te r m i n a l s
Ignition switch Continuity
Connector Terminal —
B151 1 Ground OFF Yes
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Te r m i n a l s
Power source Fuse No.
Connector Terminal
M941 Battery power 31
10 ACC power 4
Terminals Ignition switch position
(+)
(–) OFF ACC ON
Connector Terminal
M941
GroundBattery
voltageBattery
voltageBattery
voltage
10 0VBattery
voltageBattery
voltage
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Te r m i n a l s
Ignition switch Continuity
Connector Terminal —
M94 3 Ground OFF Yes
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AV-112
< SERVICE INFORMATION >
NAVIGATION SYSTEM
Power Supply and Ground Circuit Inspection for Display Unit
INFOID:0000000003533726
1. CHECK POWER SUPPLY AND GROUND CIRCUIT FOR DISPLAY CONTROL UNIT
1. Check power supply and ground circuit for display control unit. Refer to AV- 111 , "
Power Supply and
Ground Circuit Inspection for Display Control Unit".
OK or NG
OK >> GO TO 2.
NG >> Repair malfunctioning part.
2. CHECK POWER SUPPLY CIRCUIT FOR DISPLAY UNIT
1. Disconnect display unit connector M93.
2. Turn ignition switch ON.
3. Check voltage between display unit harness connector M93 ter-
minals 2, 3 and ground.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3.CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect display control unit connector M94.
3. Check continuity between display control unit harness connector M94 terminals 2, 4 and display unit har-
ness connector M93 terminals 2, 3.
4. Check continuity between display unit and ground.
OK or NG
OK >> Replace display control unit. Refer to AV-145, "Removal and Installation".
NG >> Repair harness.
4. CHECK GROUND CIRCUITApprox. 9V
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Te r m i n a l s
Continuity Display control unit Display unit
Connector Terminal Connector Terminal
M942
M932
Ye s
4 3
Te r m i n a l s
Continuity Display unit
—
Connector Terminal
M932
Ground No
3
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NAVIGATION SYSTEM
AV-113
< SERVICE INFORMATION >
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1. Turn ignition switch OFF.
2. Check continuity between display unit harness connector M93
terminals 13, 14 and ground.
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
5. CHECK HARNESS
1. Disconnect display control unit connector M94.
2. Check continuity between display unit harness connector M93
terminals 13, 14 and display control unit harness connector M94
terminals 5, 7.
OK or NG
OK >> Replace display control unit. Refer to AV-145, "Removal
and Installation".
NG >> Repair harness.
6.CHECK GROUND CIRCUIT
Check continuity between display unit and ground as follows.
1.
OK or NG
OK >> Inspection End.
NG >> Repair harness.
Power Supply and Ground Circuit Inspection for AV SwitchINFOID:0000000003533727
1.CHECK FUSE
Make sure the following fuses of the AV switch are not blown.
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of blown fuse before installing new fuse. Refer to PG-
3.
2.CHECK POWER SUPPLY CIRCUITContinuity should exist.
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Continuity should exist.
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Te r m i n a l s
Ignition
switchContinuity
Connector Terminal —
M93 1 Ground OFF Yes
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Te r m i n a l s
Power source Fuse No.
Connector Terminal
M981 Battery power 31
2 ACC power 4

AV-114
< SERVICE INFORMATION >
NAVIGATION SYSTEM
1. Disconnect AV switch connector.
2. Check voltage between connector terminals and ground as fol-
lows.
OK or NG
OK >> GO TO 3.
NG >> Check harness for open between AV switch and fuse.
3.CHECK GROUND CIRCUIT
Check continuity between AV switch and ground as follows.
OK or NG
OK >> Inspection End.
NG >> Repair or replace harness.
Vehicle Speed Signal Inspection for NAVI Control UnitINFOID:0000000003533728
1.CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect NAVI control unit connector B152, combination
meter connector M24 and display control unit connector M94.
3. Check continuity between NAVI control unit harness connector
B152 (B) terminal 66 and combination meter harness connector
M24 (A) terminal 29.
4. Check continuity between NAVI control unit harness connector
B152 (B) terminal 66 and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair harness.
2.CHECK 1: VEHICLE SPEED SIGNAL
Terminals Ignition switch position
(+)
(–) OFF ACC ON
Connector Terminal
M981
GroundBattery
voltageBattery
voltageBattery
voltage
20VBattery
voltageBattery
voltage
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Te r m i n a l s
Ignition switch Continuity
Connector Terminal —
M98 5 Ground OFF Yes
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Continuity should exist.
Continuity should not exist.
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