Infiniti G37 Coupe. Manual - part 76

AV

STEERING SWITCH SIGNAL B CIRCUIT

AV-57

< COMPONENT DIAGNOSIS >

[BASE AUDIO WITHOUT NAVIGATION]

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STEERING SWITCH SIGNAL B CIRCUIT

Description

INFOID:0000000001559175

Transmits the steering switch signal to AV control unit.

Diagnosis Procedure

INFOID:0000000001559176

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-57, "Component Inspection"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace steering switch.

Component Inspection

INFOID:0000000001559177

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

: Approx. 3.3 V

AV-58

< COMPONENT DIAGNOSIS >

[BASE AUDIO WITHOUT NAVIGATION]

STEERING SWITCH SIGNAL B 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

AV

STEERING SWITCH SIGNAL GND CIRCUIT

AV-59

< COMPONENT DIAGNOSIS >

[BASE AUDIO WITHOUT NAVIGATION]

C

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STEERING SWITCH SIGNAL GND CIRCUIT

Description

INFOID:0000000001559178

Transmits the steering switch signal to AV control unit.

Diagnosis Procedure

INFOID:0000000001559179

1.

CHECK STEERING SWITCH SIGNAL GND CIRCUIT

1.

Disconnect AV control unit connector and spiral cable connector. 

2.

Check continuity between AV control unit harness connector terminal 15 and spiral cable harness connec-
tor terminal 33.

3.

Connect AV control unit connector.

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 GROUND CIRCUIT

1.

Connect AV control unit connector.

2.

Check continuity between AV control unit harness connector terminal 15 and ground.

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-59, "Component Inspection"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace steering switch.

Component Inspection

INFOID:0000000001559180

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

Standard

15 - 33

: Continuity should exist.

15 - Ground

: Continuity should exist.

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

AV-60

< ECU DIAGNOSIS >

[BASE AUDIO WITHOUT NAVIGATION]

AV CONTROL UNIT

ECU DIAGNOSIS

AV CONTROL UNIT

Reference Value

INFOID:0000000001559182

VALUES ON THE DIAGNOSIS TOOL

CONSULT-III MONITOR ITEM

TERMINAL LAYOUT

PHYSICAL VALUES

Display Item

Dis-
play

Vehicle status

Remarks

VHCL SPD SIG

On

Vehicle speed >0 km/h (0 MPH)

Changes in indication may be delayed. This is nor-
mal.

Off

Vehicle speed =0 km/h (0 MPH)

PKB SIG

On

Parking brake is applied.

Changes in indication may be delayed. This is nor-
mal.

Off

Parking brake is released.

ILLUM SIG

On

Light switch ON

—

Off

Light switch OFF

IGN SIG

On

Ignition switch ON

—

Off

Ignition switch in ACC position

REV SIG

On

Shift the selector lever to “R” position

Changes in indication may be delayed. This is nor-
mal.

Off

Shift the selector lever other than “R” 
position

JPNIA0012ZZ

Terminal

(Wire color)

Description

Condition

Reference value

(Approx.)

+

–

Signal name

Input/

Output

2

(L)

3

(W)

Sound signal door speaker 
LH

Output

Ignition 

switch 

ON

Voice output

4

(LG)

5

(Y)

Sound signal rear speaker 
LH

Output

Ignition 

switch 

ON

Voice output

SKIB3609E

SKIB3609E