Infiniti G37 Coupe. Manual — part 107

AV

REQUEST SIGNAL CIRCUIT (SAT

→

CONT)

AV-181

< COMPONENT DIAGNOSIS >

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REQUEST SIGNAL CIRCUIT (SAT

→

CONT)

Description

INFOID:0000000001559048

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

Diagnosis Procedure

INFOID:0000000001559049

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-182

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STEERING SWITCH SIGNAL A CIRCUIT

STEERING SWITCH SIGNAL A CIRCUIT

Description

INFOID:0000000001559050

Transmits the steering switch signal to AV control unit.

Diagnosis Procedure

INFOID:0000000001559051

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-182, "Component Inspection"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace steering switch.

Component Inspection

INFOID:0000000001559052

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

Except for above
: Approx. 3.3 V

AV

STEERING SWITCH SIGNAL A CIRCUIT

AV-183

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Standard

Between terminals 14 and 17

switch

ON

: 716 – 730

Ω

MENU DOWN switch ON

: 318 – 324

Ω

MENU UP switch ON

: 120 – 122

Ω

SOURCE switch ON

: 0

Ω

Between terminals 15 and 17

switch ON

: 318 – 324

Ω

VOL UP switch ON

: 120 – 122

Ω

VOL DOWN switch ON

: 0

Ω

JSNIA0216GB

AV-184

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STEERING SWITCH SIGNAL B CIRCUIT

STEERING SWITCH SIGNAL B CIRCUIT

Description

INFOID:0000000001559053

Transmits the steering switch signal to AV control unit.

Diagnosis Procedure

INFOID:0000000001559054

1.

CHECK STEERING SWITCH SIGNAL B CIRCUIT

1.

Disconnect AV control unit connector and spiral cable connector.

2.

Check continuity between AV control unit harness connector terminal 16 and spiral cable harness connec-
tor terminal 31.

3.

Check continuity between AV control unit harness connector terminals 16 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 16 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-184, "Component Inspection"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace steering switch.

Component Inspection

INFOID:0000000001559055

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

16 - 31

: Continuity should exist.

16 - Ground

: Continuity should not exist.

16 - 15

Except for above
: Approx. 3.3 V