Infiniti G37 Coupe. Manual - part 75

AV

COMMUNICATION SIGNAL CIRCUIT (CONT-SAT)

AV-53

< COMPONENT DIAGNOSIS >

[BASE AUDIO WITHOUT NAVIGATION]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

NO

>> Replace AV control unit.

AV-54

< COMPONENT DIAGNOSIS >

[BASE AUDIO WITHOUT NAVIGATION]

REQUEST SIGNAL CIRCUIT (SAT

→

CONT)

REQUEST SIGNAL CIRCUIT (SAT

→

CONT)

Description

INFOID:0000000001689684

Request signal transmits the signal to recognize the connection of satellite radio tuner from satellite radio
tuner to AV control unit.

Diagnosis Procedure

INFOID:0000000001689685

1.

CHECK CONTINUITY REQUEST SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect satellite radio tuner connector and AV control unit connector.

3.

Check continuity between satellite radio tuner unit harness connector terminal 8 and AV control unit har-
ness connector terminal 28.

4.

Check continuity between satellite radio tuner harness connector terminal 8 and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair harness or connector.

2.

CHECK COMMUNICATION SIGNAL

1.

Connect satellite radio tuner connector and AV control unit connector.

2.

Turn ignition switch ON.

3.

Check signal between satellite radio tuner harness connector terminal 8 and ground.

Is the inspection result normal?

YES

>> Replace AV control unit.

NO

>> Replace satellite radio tuner.

8 - 28

: Continuity should exist.

8 - Ground

: Continuity should not exist.

Terminal

Condition

Reference value

8 - Ground

Ignition 

switch 

ON

When satellite radio mode is se-
lected.

SKIA9299J

AV

STEERING SWITCH SIGNAL A CIRCUIT

AV-55

< COMPONENT DIAGNOSIS >

[BASE AUDIO WITHOUT NAVIGATION]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

STEERING SWITCH SIGNAL A CIRCUIT

Description

INFOID:0000000001559172

Transmits the steering switch signal to AV control unit.

Diagnosis Procedure

INFOID:0000000001559173

1.

CHECK STEERING SWITCH SIGNAL A CIRCUIT

1.

Disconnect AV control unit connector and spiral cable connector. 

2.

Check continuity between AV control unit harness connector terminal 6 and spiral cable harness connec-
tor terminal 24.

3.

Check continuity between AV control unit harness connector terminals 6 and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair harness or connector.

2.

CHECK SPIRAL CABLE

Check spiral cable. 

Is the inspection result normal?

YES

>> GO TO 3. 

NO

>> Replace spiral cable.

3.

CHECK AV CONTROL UNIT VOLTAGE

1.

Connect AV control unit connector and spiral cable connector.

2.

Turn ignition switch ON.

3.

Check voltage between AV control unit harness connector terminals 6 and 15.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace AV control unit.

4.

CHECK STEERING SWITCH

1.

Turn ignition switch OFF.

2.

Check steering switch. Refer to 

AV-55, "Component Inspection"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace steering switch.

Component Inspection

INFOID:0000000001559174

Measure the resistance between the steering switch connector terminals 14 to 17 and 15 to 17.

6 - 24

: Continuity should exist.

6 - Ground

: Continuity should not exist.

6 - 15

: Approx. 3.3 V

AV-56

< COMPONENT DIAGNOSIS >

[BASE AUDIO WITHOUT NAVIGATION]

STEERING SWITCH SIGNAL A CIRCUIT

Standard

Between terminals 14 and 17

MENU DOWN switch ON

: 318 – 324 

Ω

MENU UP switch ON

: 120 – 122 

Ω

SOURCE switch ON

: 0 

Ω

Between terminals 15 and 17

VOL UP switch ON

: 120 – 122

Ω

VOL DOWN switch ON

: 0 

Ω

JSNIA0215GB