Nissan X-Trail 32. Manual - part 56

AV-216

< DTC/CIRCUIT DIAGNOSIS >

[WITH NAVIGATION]

U12B0 POWER SUPPLY VOLTAGE

U12B0 POWER SUPPLY VOLTAGE

DTC Description

INFOID:0000000010714881

DTC DETECTION LOGIC

POSSIBLE CAUSE

• NAVI control unit power supply circuit
• NAVI control unit

FAIL-SAFE

The function of some multi-AV systems does not operate

DTC CONFIRMATION PROCEDURE

NOTE:
• The auto ACC function allows the accessory power supply for a certain period of time even after ignition

switch OFF. For this reason, when performing diagnosis, turn the ignition switch OFF and wait for 3 minutes
with the driver's door opened.

• The operation of the vehicle during standby may cause an accessory power supply.

1.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1.

Turn ignition switch ON.

2.

Turn ignition switch OFF and wait for 3 minutes with the driver's door opened.

3.

Turn ignition switch ON and wait at least 30 seconds.

4.

Select “Self Diagnostic Result” mode of “MULTI AV” using CONSULT.

5.

Check DTC.

Is DTC U12B0 detected?

YES

>> Proceed to 

AV-216, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010714882

1.

CHECK NAVI CONTROL UNIT POWER SUPPLY CIRCUIT

Check NAVI control unit power supply circuit. Refer to 

AV-241, "NAVI CONTROL UNIT : Diagnosis Proce-

dure"

.

Is the inspection result normal?

YES

>> Replace NAVI control unit. Refer to 

AV-262, "Removal and Installation"

.

NO

>> Repair or replace malfunctioning parts.

DTC

Trouble diagnosis

(Trouble diagnosis contents)

Detecting condition

U12B0

SUPPLY VOLTAGE UNDER 9V
(Supply of the battery voltage less 
than 9V continued for 20 seconds)

NAVI control unit power supply voltage is less than the lower limit.

AV

U12B1 POWER SUPPLY VOLTAGE

AV-217

< DTC/CIRCUIT DIAGNOSIS >

[WITH NAVIGATION]

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U12B1 POWER SUPPLY VOLTAGE

DTC Description

INFOID:0000000010714883

DTC DETECTION LOGIC

POSSIBLE CAUSE

• NAVI control unit power supply circuit
• NAVI control unit

FAIL-SAFE

The function of some multi-AV systems does not operate

DTC CONFIRMATION PROCEDURE

NOTE:
• The auto ACC function allows the accessory power supply for a certain period of time even after ignition

switch OFF. For this reason, when performing diagnosis, turn the ignition switch OFF and wait for 3 minutes
with the driver's door opened.

• The operation of the vehicle during standby may cause an accessory power supply.

1.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1.

Turn ignition switch ON.

2.

Turn ignition switch OFF and wait for 3 minutes with the driver's door opened.

3.

Turn ignition switch ON and wait at least 30 seconds.

4.

Select “Self Diagnostic Result” mode of “MULTI AV” using CONSULT.

5.

Check DTC.

Is DTC U12B1 detected?

YES

>> Proceed to 

AV-217, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010714884

1.

CHECK NAVI CONTROL UNIT POWER SUPPLY CIRCUIT

Check NAVI control unit power supply circuit. Refer to 

AV-241, "NAVI CONTROL UNIT : Diagnosis Proce-

dure"

.

Is the inspection result normal?

YES

>> Replace NAVI control unit. Refer to 

AV-262, "Removal and Installation"

.

NO

>> Repair or replace malfunctioning parts.

DTC

Trouble diagnosis

(Trouble diagnosis contents)

Detecting condition

U12B1

SUPPLY VOLTAGE OVER 16V
(Supply of the battery voltage more 
than 16V continued for 20 seconds)

NAVI control unit power supply voltage is more than the upper limit.

AV-218

< DTC/CIRCUIT DIAGNOSIS >

[WITH NAVIGATION]

U12B2 DAB ANTENNA

U12B2 DAB ANTENNA

DTC Description

INFOID:0000000010714885

DTC DETECTION LOGIC

POSSIBLE CAUSE

• DAB antenna is unconnected
• Harness or connector (DAB antenna circuit is open or short)

FAIL-SAFE

DAB radio is not received

DTC CONFIRMATION PROCEDURE

NOTE:
• The auto ACC function allows the accessory power supply for a certain period of time even after ignition

switch OFF. For this reason, when performing diagnosis, turn the ignition switch OFF and wait for 3 minutes
with the driver's door opened.

• The operation of the vehicle during standby may cause an accessory power supply.

1.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1.

Turn ignition switch ON.

2.

Turn ignition switch OFF and wait for 3 minutes with the driver's door opened.

3.

Turn ignition switch ON and wait at least 30 seconds.

4.

Select “Self Diagnostic Result” mode of “MULTI AV” using CONSULT.

5.

Check DTC.

Is DTC U12B2 detected?

YES

>> Proceed to 

AV-218, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010714886

NOTE:
• The auto ACC function allows the accessory power supply for a certain period of time even after ignition

switch OFF. For this reason, when performing diagnosis, turn the ignition switch OFF and wait for 3 minutes
with the driver's door opened.

• The operation of the vehicle during standby may cause an accessory power supply.

1.

CHECK ANTENNA BASE (DAB ANTENNA) HARNESS CONNECTOR

1.

Turn ignition switch OFF.

2.

Visually check antenna base (DAB antenna) and antenna feeder.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace malfunctioning parts.

2.

CHECK CONTINUITY BETWEEN NAVI CONTROL UNIT AND ANTENNA AMP.(ANTENNA BASE)

1.

Turn ignition switch OFF.

2.

Disconnect base harness connector and NAVI control unit harness connector.

3.

Check the continuity between NAVI control unit harness connector and antenna base harness connector.

DTC

Trouble diagnosis

(Trouble diagnosis contents)

Detecting condition

U12B2

DAB ANTENNA CONN
(DAB antenna connection error)

DAB antenna connection and circuit malfunction is detected.

AV

U12B2 DAB ANTENNA

AV-219

< DTC/CIRCUIT DIAGNOSIS >

[WITH NAVIGATION]

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4.

Check the continuity between NAVI control unit harness connector and ground.

Is the inspection result normal?

YES

>> Replace NAVI control unit. Refer to 

AV-262, "Removal and Installation"

.

NO

>> Repair harness or connector.

NAVI control unit

Antenna base

Continuity

Connector

Terminals

Connector

Terminals

M390

90

M375

3

Existed

NAVI control unit

Ground

Continuity

Connector

Terminals

M390

90

Not existed