INFINITI FX35 2004 Service Manual

AV-140
NAVIGATION SYSTEM
Revision: 2004 November 2004 FX35/FX45
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.
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 max 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.

NAVIGATION SYSTEM
AV-141
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Revision: 2004 November 2004 FX35/FX45
NAVIGATION
1. The initial trouble diagnosis screen will be shown, and items
“Display Longitude & Latitude”,“Speed Calibration”,“Angle
Adjustment” and “Initialize Location” will become selective.
2. Select each switch on “NAVIGATION” screen to display the rele-
vant diagnosis screen.
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.
GPS RTC
malfunctionClock IC in GPS substrate is malfunctioning.

Correct time may not be displayed.

After the power is turned on, the system
always takes some time until GPS positioning
becomes possible. (The GPS receiver starts
positioning without re-collecting the whole sat-
ellite information when it judged the data
stored in the receiver is correct.)

Correct time of error occurrence may not be
stored in the ″History of Errors″.

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 antenna
disconnectedMalfunctioning connection between GPS substrate in NAVI control
unit and GPS antenna.

Navigation location detection performance
has deteriorated.
(Location correction using GPS is not per-
formed.)

GPS receiving status remains gray.

Perform self-diagnosis.

When connection between NAVI control unit and GPS antenna
is judged normal by self-diagnosis, the symptom may be inter-
mittent, caused by impact or vibration.
Low voltage
of GPSThe power voltage supplied to the GPS circuit board has
decreased.

Navigation location detection performance
has deteriorated.
(Location correction using GPS is not per-
formed.)

GPS receiving status remains gray.

Perform self-diagnosis.

When connection between NAVI control unit and GPS antenna
is judged normal by self-diagnosis, the symptom may be inter-
mittent, caused by impact or vibration.
DVD-ROM
Malfunction
DVD-ROM
Read error
DVD-ROM
Response
ErrorMalfunctioning NAVI control unit -
Dedicated map DVD-ROM is in the system, but the data cannot be
read.

The map of a particular location cannot be dis-
played.

Specific guidance information cannot be dis-
played.

Map display is slow.

Guidance information display is slow.

System has been affected by vibration.

Is map DVD-ROM damaged, warped, or dirty?
–If damaged or warped, the map DVD-ROM is malfunctioning.
–If dirty, wipe the DVD-ROM clean with a soft cloth.

Perform self-diagnosis.

When NAVI control unit is judged normal by self-diagnosis, the
symptom is judged intermittent, caused by vibration. Error itemPossible causes
Example of symptom
Action/symptom
SKIA4576E

AV-142
NAVIGATION SYSTEM
Revision: 2004 November 2004 FX35/FX45
Display Longitude & Latitude

Able to confirm/adjust longitude and latitude.
Angle Adjustment

Adjusts turning angle output detected by the gyroscope.
Speed Calibration

During normal driving, distance error caused by tire wear and
tire pressure change is automatically adjusted for by the auto-
matic distance correction function. This function, on the other
hand, is for immediate adjustment, in cases such as driving with
tire chain fitted on tires.
Initialize Location

This mode is for initializing the current location.
SKIA4575E
SKIA0364E
SKIA0365E

NAVIGATION SYSTEM
AV-143
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Revision: 2004 November 2004 FX35/FX45
Can Diag Support MonitorAKS007J3
OPERATION PROCEDURE
1. Start the engine.
2. Turn the audio system off.
3. While pressing the “MUTE/II ” button, turn the volume control
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 trouble 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.
NOTE:
Counter shows the status of CAN communication.
SKIA4971E
SKIA4207E
Item ContentError counter
(Reference value)
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
SKIA4288E

AV-144
NAVIGATION SYSTEM
Revision: 2004 November 2004 FX35/FX45
A/C and AV Switch Self-Diagnosis FunctionAKS00BN6
DESCRIPTION
It can check ON/OFF operation of each switch in the A/C and AV switch and diagnose the input signals to the
steering switch (audio).
Starting the SELF-DIAGNOSIS MODE
1. Turn ignition switch from OFF to ACC.
2. Within 10 seconds press and hold the witches “MUTE/II ” and
“PREV” simultaneously for 3 seconds.
Diagnosis Function

It can illuminate all the indicators (LED) in the A/C and AV switch.

It can check for continuity of the switches by sounding the buzzer when the A/C and AV switch is pressed.

It can check for continuity of harness between A/C and AV switch and steering switch (audio).
NOTE:

Indicators (LED) of REC/FRE switch change to “FRE” → “REC” → “FRE” every time the REC/FRE switch
is pushed. (These two do not turn on at a time.)

Impossible to check rear window defogger switch operation (No beep sound even under normal status).
Exiting the SELF-DIAGNOSIS MODE

Turn ignition switch OFF.
SKIB0314E

NAVIGATION SYSTEM
AV-145
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Revision: 2004 November 2004 FX35/FX45
Power Supply and Ground Circuit Check for NAVI Control UnitAKS00BN7
1. CHECK FUSE
Make sure that 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-3,
"POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Check voltage between NAVI control unit harness connector ter-
minals and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect NAVI control unit connector.
3. Check continuity between NAVI control unit harness connector
B208 terminals 1 (B), 4 (B) and ground.
OK or NG
OK >> INSPECTION END
NG >> Repair harness or connector.
Unit Signal Fuse No.
NAVI control unitBattery power supply 32
ACC power supply 6
Terminals Ignition switch position
(+)
(–) OFF ACC ON
ConnectorTerminal
(Wire color)
B2082 (Y), 3 (Y)
GroundBattery
voltageBattery
voltageBattery
voltage
6 (LG) 0VBattery
voltageBattery
voltage
SKIA8932E
1, 4 – Ground : Continuity should exist.
PKIA2853E

AV-146
NAVIGATION SYSTEM
Revision: 2004 November 2004 FX35/FX45
Power Supply and Ground Circuit Check for Display Control UnitAKS00BN8
1. CHECK FUSE
Make sure that 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-3,
"POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Check voltage between display control unit harness connector
terminals and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect display control unit.
3. Check continuity between display control unit harness connector
M75 terminal 3 (B) and ground.
OK or NG
OK >> INSPECTION END
NG >> Repair harness or connector.
Unit Signal Fuse No.
Display control unitBattery power supply 32
ACC power supply 6
Terminals Ignition switch position
(+)
(–) OFF ACC ON
ConnectorTerminal
(Wire color)
M751 (W/L)
GroundBattery
voltageBattery
voltageBattery
voltage
10 (LG/R) 0VBattery
voltageBattery
voltage
SKIA8930E
3 – Ground : Continuity should exist.
PKIA2855E

NAVIGATION SYSTEM
AV-147
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Revision: 2004 November 2004 FX35/FX45
Power Supply and Ground Circuit Check for DisplayAKS00BN9
1. CHECK DISPLAY CONTROL UNIT POEWR SUPPLY AND GROUND CIRCUIT
Check display control unit power supply and ground circuit. Refer to AV- 1 2 3 , "
Terminals and Reference Value
for Display Control Unit" .
OK or NG
OK >> GO TO 2.
NG >> Repair malfunctioning parts.
2. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between display harness connector M63 termi-
nals 2 (W/G), 3 (BR/W) and ground.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3. CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect display connector and display control unit connector.
3. Check continuity between display harness connector M63 termi-
nals 2 (W/G), 3 (BR/W) and display control unit harness connec-
tor M75 terminals 2 (W/G), 4 (BR/W).
4. Check continuity between display harness connector M63 termi-
nals 2 (W/G), 3 (BR/W) and ground.
OK or NG
OK >> Replace display control unit.
NG >> Repair harness or connector.
4. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect display connector.
3. Check continuity between display harness connector M63 termi-
nal 13 (P), 14 (P/L) and ground.
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.2, 3 – Ground : Approx. 9V
SKIA8934E
2 – 2 : Continuity should exist.
3 – 4 : Continuity should exist.
2, 3 – Ground : Continuity should not exist.
SKIB0450E
13, 14 – Ground : Continuity should exist.
SKIB0448E

AV-148
NAVIGATION SYSTEM
Revision: 2004 November 2004 FX35/FX45
5. CHECK HARNESS
1. Disconnect display control unit connector.
2. Check continuity between display harness connector M63 termi-
nals 13 (P), 14 (P/L) and display control unit harness connector
M75 terminals 5 (P), 7 (P/L).
OK or NG
OK >> Replace display control unit.
NG >> Repair harness or connector.
6. CHECK GROUND CIRCUIT
Check continuity between display harness connector M63 terminal 1
(B) and ground.
OK or NG
OK >> INSPECTION END
NG >> Repair harness or connector.13 – 5 : Continuity shold exist.
14 – 7 : Continuity shold exist.
SKIB0449E
1 – Ground : Continuity should exist.
SKIB0451E

NAVIGATION SYSTEM
AV-149
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Revision: 2004 November 2004 FX35/FX45
Power Supply and Ground Circuit Check for A/C and AV SwitchAKS00BNA
1. CHECK FUSE
Make sure that the following fuses of the A/C and AV switch 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-3,
"POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Check voltage between AC and AV switch harness connector
terminals and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect A/C and AV switch connector.
3. Check continuity between A/C and AV switch harness connector
M64 terminals 5 (B) and ground.
OK or NG
OK >> INSPECTION END
NG >> Repair harness or connector.
Vehicle Speed Signal Check for NAVI Control UnitAKS00BNB
1. VEHICLE SPEED OPERATION CHECK
Does speedmeter is operated normally?
YES or NO
YES >> GO TO 2.
NO >> Check combination meter trouble diagnosis. Refer to DI-13, "
Diagnosis Flow" .
Unit Signal Fuse No.
A/C and AV switchBattery power supply 32
ACC power supply 6
Terminals Ignition switch position
(+)
(–) OFF ACC ON
ConnectorTe r m i n a l
(Wire color)
M641 (W/L)
GroundBattery
voltageBattery
voltageBattery
voltage
2 (LG/R) 0VBattery
voltageBattery
voltage
SKIA8937E
5 – Ground : Continuity should exist.
SKIA8938E