Nissan Tiida C11. Manual - part 21

AV-78

< COMPONENT DIAGNOSIS >

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U1244 GPS ANTENNA

U1244 GPS ANTENNA

Description

INFOID:0000000001728716

DTC Logic

INFOID:0000000001728717

Diagnosis Procedure

INFOID:0000000001728718

1.

CHECK GPS ANTENNA

Visually check GPS antenna and antenna feeder.

Is inspection result OK?

YES

>> GO TO 2.

NO

>> Repair malfunctioning parts.

2.

CHECK NAVI CONTROL UNIT VOLTAGE 

1.

Disconnect GPS antenna connector.

2.

Turn ignition switch ON.

3.

Check voltage between NAVI control unit terminal 73 and ground.

Is inspection result OK?

YES

>> INSPECTION END

NO

>> Replace NAVI control unit.

Part name

Description

GPS ANTENNA

GPS signal is received and sent to NAVI control unit.

DTC

Display contents of 

CONSULT-III

DTC Detection Condition

Possible causes

U1244

GPS ANTENNA CONN
[U1244]

GPS antenna connection malfunction is detected.

GPS antenna disconnection

73 - Ground

: Approx. 5 V

AV

U1300 AV COMM CIRCUIT

AV-79

< COMPONENT DIAGNOSIS >

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U1300 AV COMM CIRCUIT

Description

INFOID:0000000001728722

U1300 is indicated when malfunction occurs in communication signal of multi AV system. It is indicated simul-
taneously, without fail, with the malfunction of control units connected to NAVI control unit with communication
line. It determines the possible malfunction cause from the table below.

SELF-DIAGNOSIS RESULTS DISPLAY ITEM

DTC

Display contents of 

CONSULT-III

Description

Possible malfunction factor/Action to 

take

U1300
U1240
U1249
U124E
U124F

• AV COMM CIRCUIT 

[U1300]

• SWITCH CONN 

[U1240]

• AUDIO H/U CONN 

[U1249]

• AMP CONN [U124E]
• RDS CONN [U124F]

• Audio unit power supply and ground circuit malfunction 

is detected.

• Malfunction occurs in AV communication circuit be-

tween NAVI control unit and audio unit.

• Malfunction is detected in AV communication signal be-

tween NAVI control unit and audio unit.

• Audio unit power supply and 

ground circuits
Refer to 

AV-80, "AV CONTROL 

UNIT : Diagnosis Procedure"

.

• AV communication circuit between 

NAVI control unit and audio unit

AV-80

< COMPONENT DIAGNOSIS >

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POWER SUPPLY AND GROUND CIRCUIT

POWER SUPPLY AND GROUND CIRCUIT

AV CONTROL UNIT

AV CONTROL UNIT : Diagnosis Procedure

INFOID:0000000001728724

1.

CHECK FUSE

Check for blown fuses.

Is inspection result OK?

YES

>> GO TO 2

NO

>> Be sure to eliminate cause of malfunction before installing new fuse.

2.

CHECK POWER SUPPLY CIRCUIT

Check voltage between AV control unit harness connectors and ground.

Is inspection result OK?

YES

>> GO TO 3

NO

>> Check harness between AV control unit and fuse.

3.

CHECK GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect AV control unit connectors.

3.

Check continuity between AV control unit harness connector and ground.

Is inspection result OK?

YES

>> INSPECTION END.

NO

>> Repair harness or connector.

NAVI CONTROL UNIT

NAVI CONTROL UNIT : Diagnosis Procedure

INFOID:0000000001728723

1.

CHECK FUSE

Check for blown fuses.

Is inspection result OK?

YES

>> GO TO 2

NO

>> Be sure to eliminate cause of malfunction before installing new fuse.

2.

CHECK POWER SUPPLY CIRCUIT

Check voltage between NAVI control unit harness connectors and ground.

Power source

Fuse No.

Battery

27

Ignition switch ACC or ON

6

Signal name

Connector No.

Terminal No.

Ignition switch position

Value (Approx.)

Battery power supply

M44

19

OFF

12V

ACC power supply

M44

7

ACC

12V

Signal name

Connector No.

Terminal No.

Ignition switch position

Continuity 

Ground

M44

21

OFF

Continuity should exist.

Power source

Fuse No.

Battery

27

Ignition switch ACC or ON

6

Ignition switch ON or START 

2

AV

POWER SUPPLY AND GROUND CIRCUIT

AV-81

< COMPONENT DIAGNOSIS >

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Is inspection result OK?

YES

>> GO TO 3

NO

>> Check harness between NAVI control unit and fuse.

3.

CHECK GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect NAVI control unit connectors.

3.

Check continuity between NAVI control unit harness connector and ground.

Is inspection result OK?

YES

>> INSPECTION END.

NO

>> Repair harness or connector.

DISPLAY UNIT

DISPLAY UNIT : Diagnosis Procedure

INFOID:0000000001728725

1.

CHECK FUSE

Check for blown fuses.

Is inspection result OK?

YES

>> GO TO 2

NO

>> Be sure to eliminate cause of malfunction before installing new fuse.

2.

CHECK POWER SUPPLY CIRCUIT

Check voltage between display unit harness connectors and ground.

Is inspection result OK?

YES

>> GO TO 3

NO

>> Check harness between display unit and fuse.

3.

CHECK GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect display unit connector.

3.

Check continuity between display unit harness connector and ground.

Is inspection result OK?

YES

>> INSPECTION END.

NO

>> Repair harness or connector.

Signal name

Connector No.

Terminal No.

Ignition switch position

Value (Approx.)

Battery power supply

B69

2

OFF

12V

ACC power supply

B69

5

ACC

12V

Ignition signal

B68

63

ON

12V

Signal name

Connector No.

Terminal No.

Ignition switch position

Continuity 

Ground

B69

1

OFF

Continuity should exist.

Power source

Fuse No.

Battery

27

Ignition switch ACC or ON

6

Signal name

Connector No.

Terminal No.

Ignition switch position

Value (Approx.)

Battery power supply

M100

21

OFF

12V

ACC power supply

M100

20

ACC

12V

Signal name

Connector No.

Terminal No.

Ignition switch position

Continuity 

Ground

M100

23

OFF

Continuity should exist.