Infiniti G35 (V35) Sedan. Manual - part 97

 

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Infiniti G35 (V35) Sedan. Manual - part 97

 

 

AV-160

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITHOUT NAVIGATION]

U1300 AV COMM CIRCUIT

U1300 AV COMM CIRCUIT

Description

INFOID:0000000000964657

U1300 is indicated when malfunction occurs in communication signal of multi AV system. Indicated simulta-
neously, without fail, with the malfunction of control units connected to AV control unit with communication line.
Determine the possible malfunction cause from the table below.

Self-diagnosis results display item

DTC

Display contents of 

CONSULT-III

DTC Detection Condition

Possible causes

U1300
U1240

• AV COMM CIRCUIT

[U1300]

• SWITCH CONN

[U1240]

• Mutifunction switch power supply and ground circuit 

malfunction is detected

• A malfunction is detected in communication circuit be-

tween AV control unit and multifunction switch

• A malfunction is detected in communication signal be-

tween AV control unit and multifunction switch

• Multifunction switch power supply 

and ground circuits

• Communication circuit between AV 

control unit and multifunction 
switch

U1300
U1256

• AV COMM CIRCUIT

[U1300]

• HAND FREE CONN 

[U1256]

• TEL adapter unit power supply and ground circuit mal-

function is detected

• Malfunction is detected in communication circuit be-

tween TEL adapter unit and AV control unit

• Malfunction is detected in communication signal be-

tween TEL adapter unit and AV control unit

• TEL adapter unit power supply and 

ground circuit

• Communication circuit between 

TEL adapter unit and AV control 
unit

U1300
U1240
U1256

• AV COMM CIRCUIT 

[U1300]

• SWITCHE CONN 

[U1240]

• HAND FREE CONN 

[U1256]

Malfunction is detected in communication circuit between 
AV control unit and the branch point multifunction switch 
and TEL adapter unit

Communication circuit between AV 
control unit and the branch point mul-
tifunction switch and TEL adapter unit

AV

POWER SUPPLY AND GROUND CIRCUIT

AV-161

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITHOUT NAVIGATION]

C

D

E

F

G

H

I

J

K

L

M

B

N

A

O

P

POWER SUPPLY AND GROUND CIRCUIT

AV CONTROL UNIT

AV CONTROL UNIT : Diagnosis Procedure

INFOID:0000000000964658

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 connectors and ground.

Is inspection result OK?

YES

>> INSPECTION END

NO

>> Repair harness or connector.

DISPLAY UNIT

DISPLAY UNIT : Diagnosis Procedure

INFOID:0000000000964659

1.

CHECK POWER SUPPLY CIRCUIT (DISPLAY SIDE)

Check voltage between Display unit harness connector and ground.

Is inspection result OK?

YES

>> GO TO 4.

NO

>> GO TO 2.

Power source

Fuse No.

Battery

34

Ignition switch ACC or ON

19

Ignition switch ON or START 

3

Signal name

Connector No.

Terminal No.

Ignition switch position

Value (Approx.)

Battery power supply

M81

19

OFF

12 V

ACC power supply

M81

7

ACC

12 V

Ignition signal

M85

104

ON

12 V

Signal name

Connector No.

Terminal No.

Ignition switch position

Continuity 

Ground

M81

20

OFF

Continuity should exist.

M85

85

Signal name

Connector No.

Terminal No.

Ignition switch position

Value (Approx.)

Inverter VCC

M71

2

ACC

9 V

Signal VCC

3

AV-162

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITHOUT NAVIGATION]

POWER SUPPLY AND GROUND CIRCUIT

2.

CHECK POWER SUPPLY CIRCUIT (CONTINUITY)

1.

Turn ignition switch OFF.

2.

Disconnect the harness connector between display unit and AV control unit.

3.

Check continuity between display unit harness connector M71 and AV control unit harness connector M83

4.

Check continuity between display unit harness connector M71 and ground. 

Is inspection result OK?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK POWER SUPPLY CIRCUIT (AV CONTROL UNIT SIDE)

1.

Connect the AV control unit harness connector.

2.

Turn ignition switch ACC.

3.

Check voltage between AV control unit harness connector and ground.

Is inspection result OK?

YES

>> INSPECTION END

NO

>> Replacement of AV control unit. 

4.

CHECK GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect Display unit connector.

3.

Check continuity between Display unit harness connectors and ground.

Is inspection result OK?

YES

>> INSPECTION END

NO

>> Repair harness or connector.

MULTIFUNCTION SWITCH

MULTIFUNCTION SWITCH : Diagnosis Procedure

INFOID:0000000000964660

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. 

Signal name

Display unit (M71)

AV control unit (M83)

Continuity

Inverter VCC

2

59

Continuity should exist.

Signal VCC

3

47

Continuity should exist.

Signal name

Display unit (M71)

Continuity

Inverter VCC

2

Ground

Continuity should not exist.

Signal VCC

3

Ground

Continuity should not exist.

Signal name

Connector No.

Terminal No.

Ignition switch position

Value (Approx.)

Inverter VCC

M83

59

ACC

9 V

Signal VCC

47

Signal name

Connector No.

Terminal No.

Ignition switch position

Continuity 

Ground

M71

1

OFF

Continuity should exist.

Power source

Fuse No.

Ignition switch ACC or ON

19

AV

POWER SUPPLY AND GROUND CIRCUIT

AV-163

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITHOUT NAVIGATION]

C

D

E

F

G

H

I

J

K

L

M

B

N

A

O

P

2.

CHECK POWER SUPPLY CIRCUIT

Check voltage between multifunction switch harness connector and ground.

Is inspection result OK?

YES

>> GO TO 3.

NO

>> Check harness between multifunction switch and fuse.

3.

CHECK GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect multifunction switch connector.

3.

Check continuity between multifunction switch harness connector and ground.

Is inspection result OK?

YES

>> INSPECTION END

NO

>> Repair harness or connector.

SATELLITE RADIO TUNER

SATELLITE RADIO TUNER : Diagnosis Procedure

INFOID:0000000000964661

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 satellite radio tuner harness connector and ground.

Is inspection result OK?

YES

>> INSPECTION END

NO

>> Check harness between satellite radio tuner and fuse.

TEL ADAPTER UNIT

TEL ADAPTER UNIT : Diagnosis Procedure

INFOID:0000000000964662

1.

CHECK FUSE

Check for blown fuses.

Signal name

Connector No.

Terminal No.

Ignition switch position

Value (Approx.)

ACC power supply

M72

3

ACC

12 V

Signal name

Connector No.

Terminal No.

Ignition switch position

Continuity 

Ground

M72

1

OFF

Continuity should exist.

Power source

Fuse No.

Battery

34

Ignition switch ACC or ON

19

Signal name

Connector No.

Terminal No.

Ignition switch position

Value (Approx.)

Battery power supply

B236

12

OFF

12 V

ACC power supply

B236

16

ACC

12 V

Power source

Fuse No.

Battery

34

 

 

 

 

 

 

 

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