Nissan Leaf. Manual — part 95
AV
DIAGNOSIS SYSTEM (AV CONTROL UNIT)
AV-371
< SYSTEM DESCRIPTION >
[NAVIGATION WITH BOSE]
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Display Diagnosis
Vehicle Signals
A comparison check can be made of each actual vehicle signal and
the signals recognized by the system.
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AV-372
< SYSTEM DESCRIPTION >
[NAVIGATION WITH BOSE]
DIAGNOSIS SYSTEM (AV CONTROL UNIT)
Navigation
STEERING ANGLE ADJUSTMENT
• The steering angle output value detected with the gyroscope is
adjusted.
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.
SENSOR INFORMATION
• Displays the reception status of the GPS antenna connector.
XM SUBSCRIPTION STATUS
• The XM subscription status can be checked.
Error location display
The self-diagnosis results are judged depending on whether any error occurs from when “Self-diagnosis” is
selected until the self-diagnosis results are displayed.
Diagnosis item
Display
Vehicle status
Remarks
Vehicle speed
ON
Vehicle speed > 0 km/h (0 MPH)
Changes in indication may be delayed. This is normal.
OFF
Vehicle speed = 0 km/h (0 MPH)
Parking brake
ON
Parking brake is applied.
OFF
Parking brake is released.
Lights
ON
Block the light beam from the auto
light optical sensor when the light
switch is ON.
—
OFF
Either of the following conditions
• Lighting switch OFF
• Expose the auto light optical sen-
sor to light when the light switch
is ON.
Power button
ON
Power button ON
—
OFF
Power button in ACC position
Reverse
ON
Shift the selector lever to “R” posi-
tion
Changes in indication may be delayed. This is normal.
OFF
Shift the selector lever other than
“R” position
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AV
DIAGNOSIS SYSTEM (AV CONTROL UNIT)
AV-373
< SYSTEM DESCRIPTION >
[NAVIGATION WITH BOSE]
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However, the diagnosis results are judged normal if an error has occurred before the power switch is turned
ON and then no error has occurred until the self-diagnosis start. Check the “Error Record” to detect any error
that may have occurred before the self-diagnosis start because of this situation.
The error record displays the time and place of the most recent occurrence of that error. However, take note of
the following points.
• If there is a malfunction with the GPS antenna circuit board in the AV control unit, the correct date and time
of occurrence may not be able to be displayed.
• Place of the error occurrence is represented by the position of the current location mark at the time an error
occurred. If current location mark has deviated from the correct position, then the place of the error occur-
rence cannot be located correctly.
• The frequency of occurrence is displayed in a count up manner. The actual count up method differs depend-
ing on the error item.
Count up method A
• The counter resets to 0 if an error occurs when power switch is turned ON. The counter increases by 1 if the
condition is normal at a next power ON cycle.
• The counter upper limit is 39. Any counts exceeding 39 are ignored.“ The counter can be reset (no error
record display) with the “Delete log” switch or CONSULT.
Error item
Some error items may be displayed simultaneously according to the cause. If some error items are displayed
simultaneously, the detection of the cause can be performed by the combination of display items
Display type of occur-
rence frequency
Error history display item
Count up method A
CAN communication line, control unit (CAN), AV communication line, control unit (AV)
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Error item
Description
Possible malfunction factor/Action to take
CAN COMM CIRCUIT
CAN communication malfunction is detect-
ed.
Perform diagnosis with CONSULT, and
then repair the malfunctioning parts accord-
ing to the diagnosis results.
Refer to
CONTROL UNIT (CAN)
CAN initial diagnosis malfunction is detect-
ed.
Replace the AV control unit if the malfunc-
tion occurs constantly.
Refer to
AV-488, "Removal and Installa-
.
CONTROL UNIT (AV)
AV communication circuit initial diagnosis
malfunction is detected.
Control Unit Internal Error
AV control unit malfunction is detected.
Switch Initial Communication Error
AV control unit or multifunction switch inter-
nal malfunction are detected.
Replace the AV control unit or multifunction
switch if the malfunction occurs constantly.
Refer to
AV-488, "Removal and Installation"
(AV control unit),
(multifunction switch).
Steer. Angle Sensor Calibration
Predictive course line center position ad-
justment of the steering angle sensor is in-
complete.
Adjust the predictive course line center po-
sition of the steering angle sensor.
Refer to
AV-374
< SYSTEM DESCRIPTION >
[NAVIGATION WITH BOSE]
DIAGNOSIS SYSTEM (AV CONTROL UNIT)
AV COMM Diagnosis
• Displays the communication status between AV control unit (mas-
ter unit) and each unit.
• The error counter displays “OK” if any malfunction was not
detected in the past and displays “0” if a malfunction is detected. It
increases by 1 if the condition is normal at the next power switch
ON cycle. The upper limit of the counter is 39.
• The error counter is erased if “Reset” is pressed.
NOTE:
“???” indicates UNKWN
Hands-Free Phone, CARWINGS
The hands-free phone reception volume adjustment and microphone
and speaker test functions are also available.
NOTE:
If voice cannot be output when the Voice Microphone Test is started,
stop and restart the test again.
Clock Setting
The clock can be set.
GPS Antenna Error
GPS antenna connection malfunction is de-
tected.
Check the connection of the GPS antenna
connector.
XM Antenna Connection Error
Satellite radio antenna connection malfunc-
tion is detected.
Satellite radio antenna disconnection.
USB electric current error
Detection of overcurrent in USB connector.
Check USB harness between the AV con-
trol unit and USB connector.
TCU Connection Error
TCU connection malfunction is detected.
Check that the connection to the TCU con-
nector is normal.
• AV COMM CIRCUIT
• Switches Connection Error
When either one of the following items are
detected:
• multifunction switch power supply and
ground circuits are malfunctioning.
• AV communication circuits between AV
control unit and multifunction switch are
malfunctioning.
• Multifunction switch power supply and
ground circuits.
• AV communication circuits between AV
control unit and multifunction switch.
Error item
Description
Possible malfunction factor/Action to take
Items
Status
(Current)
Counter
(Past)
C Tx(ITM–PrimarySW)
OK / ???
OK / 0 – 39
C Rx(PrimarySW–ITM)
OK / ???
OK / 0 – 39
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