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Nissan Titan A60. Manual - part 98

DIAGNOSIS SYSTEM (NAVI CONTROL UNIT)

AV-217

< SYSTEM DESCRIPTION >

[PREMIUM WITH NAVIGATION]

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.

DIAGNOSIS SYSTEM (NAVI CONTROL UNIT)

AV-219

< SYSTEM DESCRIPTION >

[PREMIUM WITH NAVIGATION]

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.

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

Content .. 96 97 98 99 ..