Nissan Leaf. Manual - part 78

AV

STEERING SWITCH

AV-303

< DTC/CIRCUIT DIAGNOSIS >

[NAVIGATION WITHOUT BOSE]

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STEERING SWITCH

Diagnosis Procedure

INFOID:0000000010122569

Regarding Wiring Diagram information, refer to 

AV-255, "Wiring Diagram"

.

1.

CHECK STEERING WHEEL AUDIO CONTROL SWITCH RESISTANCE

1. Turn power switch OFF.

2. Disconnect combination switch connector M112.

3. Check resistance between the terminals of combination switch connector M112.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace steering switches. Refer to 

AV-327, "Removal and Installation"

.

2.

CHECK COMBINATION SWITCH

Check continuity between combination switch connectors M112 and M92.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace spiral cable. Refer to 

SR-23, "Removal and Installation"

.

3.

CHECK HARNESS BETWEEN COMBINATION SWITCH AND AV CONTROL UNIT 

1. Disconnect AV control unit connector M95.

2. Check continuity between combination switch connector M92 and AV control unit connector M95.

Combination switch connector M112

Condition

Resistance 

Ω

(Approx.)

Terminal

Terminal

14

17

Depress SOURCE switch.

1

Depress  

switch.

121

Depress  

switch.

321

Depress  

switch.

723

15

Depress  

switch.

1

Depress  

switch.

121

Depress  

switch. 

321

Combination switch 

Continuity

Connector

Terminal

Connector

Terminal

M112

14

M92

24

Yes

15

31

17

33

Combination switch

AV control unit 

Continuity

Connector

Terminal

Connector

Terminal

M92

24

M95

6

Yes

31

16

33

15

AV-304

< DTC/CIRCUIT DIAGNOSIS >

[NAVIGATION WITHOUT BOSE]

STEERING SWITCH

3. Check continuity between combination switch connector M92 and ground.

Is the inspection result normal?

YES

>> Replace AV control unit. Refer to 

AV-318, "Removal and Installation"

.

NO

>> Repair or replace harness or connectors.

Combination switch

Ground

Continuity

Connector

Terminal

M92

24

—

No

31

33

AV

USB CONNECTOR

AV-305

< DTC/CIRCUIT DIAGNOSIS >

[NAVIGATION WITHOUT BOSE]

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USB CONNECTOR

Diagnosis Procedure

INFOID:0000000010122570

Regarding Wiring Diagram information, refer to 

AV-255, "Wiring Diagram"

.

1.

CHECK USB HARNESS CONTINUITY

1. Turn power switch OFF.

2. Disconnect AV control unit connector M98 and USB connector M53.

3. Check continuity between AV control unit connector M98 and USB connector M53.

4. Check continuity between AV control unit connector M98 and ground.

Is the inspection result normal?

YES

>> Replace the USB connector. Refer to 

AV-329, "Removal and Installation"

.

NO

>> Repair or replace harness or connectors.

AV control unit

USB 

Continuity

Connector

Terminal

Connector

Terminal

M98

78

M53

2

Yes

79

1

80

4

81

3

82

5

AV control unit

—

Continuity

Connector

Terminal

M98

79

Ground

No

82

AV-306

< SYMPTOM DIAGNOSIS >

[NAVIGATION WITHOUT BOSE]

MULTI AV SYSTEM

SYMPTOM DIAGNOSIS

MULTI AV SYSTEM

Symptom Table

INFOID:0000000010122571

RELATED TO AUDIO

Symptoms

Check items

Probable malfunction location

The disk cannot be removed.

AV control unit

Malfunction in AV control unit.
Refer to 

AV-238, "On Board Diagnosis Function"

.

No sound comes out or the level of 
the sound is low.

No sound from all speakers.

• Speaker circuit shorted to ground.

Refer to 

AV-255, "Wiring Diagram"

.

• AV control unit power supply and ground circuits 

malfunction.
Refer to 

AV-291, "AV CONTROL UNIT : Diagnosis 

Procedure"

.

Only a certain speaker (front door 
speaker LH, front door speaker RH, 
tweeter LH, tweeter RH, rear door 
speaker LH, rear door speaker RH does 
not output sound.

• Poor connector connection of speaker.
• Sound signal circuit malfunction between AV con-

trol unit and speaker.
Refer to:

-

AV-292, "Diagnosis Procedure"

 (front door speak-

er).

-

AV-294, "Diagnosis Procedure"

 (tweeter).

-

AV-296, "Diagnosis Procedure"

 (rear door speak-

er).

• Malfunction in speaker.

Refer to:

-

AV-320, "Removal and Installation"

 (front door 

speaker).

-

AV-321, "Removal and Installation"

 (tweeter).

-

AV-322, "Removal and Installation"

 (rear door 

speaker).

• Malfunction in AV control unit.

Refer to 

AV-238, "On Board Diagnosis Function"

.

Noise is mixed with audio.

Noise comes out from all speakers.

• Malfunction in AV control unit.

Refer to 

AV-238, "On Board Diagnosis Function"

.

Noise comes out only from a certain 
speaker (front door speaker LH, front 
door speaker RH, tweeter LH, tweeter 
RH, rear door speaker LH, rear door 
speaker RH).

• Poor connector connection of speaker.
• Sound signal circuit malfunction between AV con-

trol unit and speaker.
Refer to:

-

AV-292, "Diagnosis Procedure"

 (front door speak-

er).

-

AV-294, "Diagnosis Procedure"

 (tweeter).

-

AV-296, "Diagnosis Procedure"

 (rear door speak-

er).

• Malfunction in speaker.
• Poor Installation of speaker (e.g. backlash and 

looseness).
Refer to:

-

AV-320, "Removal and Installation"

 (front door 

speaker).

-

AV-321, "Removal and Installation"

 (tweeter).

-

AV-322, "Removal and Installation"

 (rear door 

speaker).

• Malfunction in AV control unit.

Refer to 

AV-238, "On Board Diagnosis Function"

.

Noise is mixed with radio only (when the 
vehicle hits a bump or while driving over 
bad roads)

Poor connector connection of antenna or antenna 
feeder.
Refer to 

AV-325, "Antenna Feeder"

.