2004 INFINITI QX56 ignition

AV-110
NAVIGATION SYSTEM
Revision: August 20072004 QX56
VEHICLE SIGNALS

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- 1 2 1 , "Vehicle Speed Signal Check for NAVI Control Unit" .

If light is NG, refer to AV- 1 2 3 , "Illumination Signal Check for NAVI Control Unit" .

If IGN is NG, refer to AV-123, "Ignition Signal Check for NAVI Control Unit" .

If reverse is NG, refer to AV-124, "Reverse Signal Check for NAVI Control Unit" .
HISTORY OF ERRORS
DIAGNOSIS BY HISTORY OF ERRORS
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.
LKIA0217E
Diagnosis item Display Condition Remarks
Vehicle speedON Vehicle speed > 0 km/h (0 MPH)
Changes in indication may be delayed by
approx. 1.5 seconds. This is normal. OFF Vehicle speed = 0 km/h (0 MPH)
– Ignition switch in ACC position
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
approx. 1.5 seconds. This is normal. OFF Selector lever in other than R position
– Ignition switch in ACC position
SKIA0366E

NAVIGATION SYSTEM
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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 “History of Errors”.
The History of Errors 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
displayed 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 History of
Errors), then turn the ignition switch from OFF to ON to reproduce the malfunction. Check the History of Errors
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 inter-
ference.
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 inter-
ference.
GPS trans-
mission cable
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 inter-
ference.
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 inter-
ference.
GPS TCX0
over
GPS TCX0
underOscillating frequency of the GPS substrate frequency synchroniz-
ing 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 inter-
ference, or the control unit may have been subjected to exces-
sively 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 inter-
ference.

AV-114
NAVIGATION SYSTEM
Revision: August 20072004 QX56
CAN DIAG SUPPORT MONITOREKS007LX
OPERATION PROCEDURE
1. Start the engine.
2. Turn the audio system off.
3. While pressing the “PAUSE/MUTE” button, turn the volume con-
trol dial clockwise or counterclockwise for 30 clicks or more.
(When the self-diagnosis mode is started, a short beep will be
heard.)

Shifting from current screen to previous screen is performed
by pressing “PREV” button.
4. The initial self-diagnosis screen will be shown, and items “Self-
Diagnosis (DCU)”, “Self-Diagnosis (NAVI)”, “Confirmation/
Adjustment” and “CAN DIAG SUPPORT MONITOR” will
become selective.
5. Select “CAN DIAG SUPPORT MONITOR”.
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)
WKIA1504E
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Item Content Error counter
CANCOMM 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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NAVIGATION SYSTEM
AV-115
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Revision: August 20072004 QX56

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 FunctionEKS007LY
Refer to AV-27, "AV Switch Self-Diagnosis Function" .

AV-116
NAVIGATION SYSTEM
Revision: August 20072004 QX56
Power Supply and Ground Circuit Check for NAVI Control UnitEKS007LZ
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 case of malfunction before installing new fuse. Refer to PG-4,
"POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Disconnect NAVI control unit connector.
2. Check voltage between connector terminals and ground as fol-
lows.
OK or NG
OK >> GO TO 3.
NG >> Check harness for open or short between NAVI control unit and fuse.
3. CHECK GROUND CIRCUIT
Check continuity between the following NAVI control unit and
ground.
OK or NG
OK >> Inspection End.
NG >> Repair or replace harness.
Te r m i n a l s
Power source Fuse No.
Connector Terminal (Wire color)
B1512 (Y), 3 (Y) Battery power 31
6 (O) ACC power 4
Terminals Ignition switch position
(+)
(–) OFF ACC ON
ConnectorTerminal
(Wire color)
B1512 (Y), 3 (Y)
GroundBattery
voltageBattery
voltageBattery
voltage
6 (O) 0VBattery
voltageBattery
voltage
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Te r m i n a l s
Ignition switch Continuity
Connector Terminal (Wire color) —
B151 1 (B), 4 (B) Ground OFF Yes
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NAVIGATION SYSTEM
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Revision: August 20072004 QX56
Power Supply and Ground Circuit Check for Display Control UnitEKS007M0
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 case of malfunction before installing new fuse. Refer to PG-4,
"POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Disconnect display control unit connector.
2. Check voltage between connector terminals and ground as fol-
lows.
OK or NG
OK >> GO TO 3.
NG >> Check harness for open or short between display control unit and fuse.
3. CHECK GROUND CIRCUIT
Check continuity between the following display control unit and
ground.
OK or NG
OK >> Inspection End.
NG >> Repair or replace harness.
Terminals
Power source Fuse No.
Connector Terminal (Wire color)
M941 (Y) Battery power 31
10 (O) ACC power 4
Terminals Ignition switch position
(+)
(–) OFF ACC ON
ConnectorTe r m i n a l
(Wire color)
M941 (Y)
GroundBattery
voltageBattery
voltageBattery
voltage
10 (O) 0VBattery
voltageBattery
voltage
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Te r m i n a l s
Ignition switch Continuity
Connector Terminal (Wire color) —
M943 (B)
Ground OFF Yes
13 (B)
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AV-118
NAVIGATION SYSTEM
Revision: August 20072004 QX56
Power Supply and Ground Circuit Check for Display UnitEKS007M1
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- 11 7 , "
Power Supply and
Ground Circuit Check 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.
2. Turn ignition switch ON.
3. Check voltage between display unit harness connector M93 ter-
minals 2 (L/W), 3 (L/R) and ground.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3. CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect display unit connector and display control unit connector.
3. Check continuity between display control unit harness connector M94 terminals 2 (L/W), 4 (L/R) and dis-
play unit harness connector M93 terminals 2 (L/W), 3 (L/R).
4. Check continuity between display unit and ground.
OK or NG
OK >> Replace display control unit. Refer to AV- 1 5 8 , "Removal and Installation of Display Control Unit" .
NG >> Repair harness.Approx. 9V
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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)
M942 (L/W)
M932 (L/W)
Ye s
4 (L/R) 3 (L/R)
Te r m i n a l s
Continuity Display unit
—
Connector Terminal (Wire color)
M932 (L/W)
Ground No
3 (L/R)
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NAVIGATION SYSTEM
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4. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between display unit harness connector M93
terminals 13 (P), 14 (P/L) and ground.
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
5. CHECK HARNESS
1. Disconnect display control unit connector.
2. Check continuity between display unit harness connector M93
terminals 13 (P), 14 (P/L) and display control unit harness con-
nector M94 terminals 5 (P), 7 (P/L).
OK or NG
OK >> Replace display control unit. Refer to AV-158, "Removal
and Installation of Display Control Unit" .
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.Continuity should exist.
WKIA2079E
Continuity should exist.
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Te r m i n a l s
Ignition
switchContinuity
Connector Terminal (Wire color) —
M93 1 (B) Ground OFF Yes
WKIA1228E