Infiniti FX35, FX50 (S51). Manual - part 87

 

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Infiniti FX35, FX50 (S51). Manual - part 87

 

 

AV

COMMUNICATION SIGNAL CIRCUIT (CONT-SAT)

AV-121

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT NAVIGATION]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

COMMUNICATION SIGNAL CIRCUIT (CONT-SAT)

Description

INFOID:0000000005246842

Satellite radio tuner and AV control unit are connected with a serial communication. They transmit the opera-
tion signal from AV control unit to satellite radio tuner, and transmit the display signal from satellite radio tuner
to AV control unit. 

Diagnosis Procedure

INFOID:0000000005246843

1.

CHECK CONTINUITY COMMUNICATION 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 harness connector and AV control unit harness connector.

4.

Check continuity between satellite radio tuner harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair harness or connector.

2.

CHECK COMMUNICATION SIGNAL (SAT

CONT)

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 and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace satellite radio tuner. Refer to 

AV-146, "Exploded View"

.

3.

CHECK COMMUNICATION SIGNAL (CONT

SAT)

Check signal between satellite radio tuner harness connector and ground.

Satellite radio tuner

AV control unit

Continuity

Connector

Terminals

Connector

Terminals

B236

9

M206

130

Existed

10

122

Satellite radio tuner

Ground

Continuity

Connector

Terminals

B236

9

Not existed

10

(+)

(

)

Condition

Reference value

Satellite radio tuner

Connector

Terminal

B236

9

Ground

When satellite radio mode is 
selected.

SKIA9300J

AV-122

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT NAVIGATION]

COMMUNICATION SIGNAL CIRCUIT (CONT-SAT)

Is the inspection result normal?

YES

>> Replace satellite radio tuner. Refer to 

AV-146, "Exploded View"

.

NO

>> Replace AV control unit. Refer to 

AV-136, "Exploded View"

.

(+)

(

)

Condition

Reference value

Satellite radio tuner

Connector

Terminal

B236

10

Ground

When satellite radio mode is 
selected.

SKIA9301J

AV

REQUEST SIGNAL CIRCUIT (SAT

CONT)

AV-123

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT NAVIGATION]

C

D

E

F

G

H

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L

M

B

A

O

P

REQUEST SIGNAL CIRCUIT (SAT

CONT)

Description

INFOID:0000000005246844

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

Diagnosis Procedure

INFOID:0000000005246845

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 and AV control unit harness connec-
tor.

4.

Check continuity between satellite radio tuner harness connector 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 and ground.

Is the inspection result normal?

YES

>> Replace AV control unit. Refer to 

AV-136, "Exploded View"

.

NO

>> Replace satellite radio tuner. Refer to 

AV-146, "Exploded View"

.

Satellite radio tuner

AV control unit

Continuity

Connector

Terminal

Connector

Terminal

B236

8

M206

129

Existed

Satellite radio tuner

Ground

Continuity

Connector

Terminal

B236

8

Not existed

(+)

(

)

Condition

Reference value

Satellite radio tuner

Connector

Terminal

B236

8

Ground

When satellite radio mode is 
selected.

SKIA9299J

AV-124

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT NAVIGATION]

STEERING SWITCH SIGNAL A CIRCUIT

STEERING SWITCH SIGNAL A CIRCUIT

Description

INFOID:0000000005530041

Transmits the steering switch signal to AV control unit.

Diagnosis Procedure

INFOID:0000000005530042

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 and spiral cable harness connector.

3.

Check continuity between AV control unit harness connector 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. Refer to 

SR-14, "Exploded View"

.

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.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace AV control unit. Refer to 

AV-136, "Exploded View"

.

4.

CHECK STEERING SWITCH

1.

Turn ignition switch OFF.

2.

Check steering switch. Refer to 

AV-124, "Component Inspection"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace steering switch. Refer to 

SR-11, "Exploded View"

.

Component Inspection

INFOID:0000000005530059

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

AV control unit

Spiral cable

Continuity

Connector

Terminal

Connector

Terminal

M201

6

M36

24

Existed

AV control unit

Ground

Continuity

Connector

Terminal

M201

6

Not existed

(+)

(

)

Voltage

(Approx.)

AV control unit

AV control unit

Connector

Terminal

Connector

Terminal

M201

6

M201

15

3.3  V

 

 

 

 

 

 

 

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