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 

AV-376, "CONSULT Function"

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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-

tion"

.

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), 

AV-489, "Removal and In-

stallation"

 (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-376, "CONSULT Function"

.

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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