Nissan Titan A60. Instruction — part 98
AV
DIAGNOSIS SYSTEM (NAVI CONTROL UNIT)
AV-217
< SYSTEM DESCRIPTION >
[PREMIUM WITH NAVIGATION]
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1. The navigation screen will be shown, and items “Speed Calibra-
tion” and “Steering Angle Adjustment” will become selective.
2. Select each switch on “NAVIGATION” screen to display the rele-
vant diagnosis screen.
Steering 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 automatic dis-
tance correction function. This function, on the other hand, is for
immediate adjustment, in cases such as driving with tire chain fit-
ted on tires.
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.
WKIA4312E
WKIA4314E
WKIA4315E
WKIA4444E
AV-218
< SYSTEM DESCRIPTION >
[PREMIUM WITH NAVIGATION]
DIAGNOSIS SYSTEM (NAVI CONTROL UNIT)
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”.
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 item
Possible causes
Example of symptom
Action/symptom
Gyro sensor
disconnected
Communications 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-
nected
Communication 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
malfunction
Malfunctioning 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 error
Malfunctioning 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
under
Oscillating 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
malfunction
Contents 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
DIAGNOSIS SYSTEM (NAVI CONTROL UNIT)
AV-219
< SYSTEM DESCRIPTION >
[PREMIUM WITH NAVIGATION]
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CAN DIAG SUPPORT MONITOR
1. Start the engine.
2. Turn the audio system off.
3. While pressing the “MEMORY 4” 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 “BACK” 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”.
GPS RTC
malfunction
Clock IC in GPS substrate is malfunctioning.
• Correct time may not be displayed.
• After the power is turned on, the system al-
ways 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
″Error History″.
• 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 anten-
na discon-
nected
Malfunctioning 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 intermit-
tent, caused by impact or vibration.
Low voltage
of GPS
The power voltage supplied to the GPS circuit board has de-
creased.
• 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 intermit-
tent, caused by impact or vibration.
DVD-ROM
Malfunction
DVD-ROM
Read error
DVD-ROM
Response Er-
ror
Malfunctioning NAVI control unit.
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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 item
Possible causes
Example of symptom
Action/symptom
ALNIA0749GB
SKIA4207E
AV-220
< SYSTEM DESCRIPTION >
[PREMIUM WITH NAVIGATION]
DIAGNOSIS SYSTEM (NAVI CONTROL UNIT)
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.
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
SKIA4288E
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