Infiniti QX56 (JA60). Manual - part 873

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SONAR BUZZER CIRCUIT INSPECTION

SN-17

< COMPONENT DIAGNOSIS >

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SONAR BUZZER CIRCUIT INSPECTION

Description

INFOID:0000000005146199

When the A/T selector lever is not it park or neutral, a stationary object will be detected by the sonar sensors

causing the front or rear sonar buzzer to sound a tone. As the vehicle moves closer to the object, the rate of

the tone will increase.  When the object is very close to the vehicle, the tone will sound continuously.

Diagnosis Procedure (With Rear Sonar System)

INFOID:0000000005146200

Regarding Wiring Diagram information, refer to 

SN-23, "Wiring Diagram"

.

1.

CHECK SONAR BUZZER

Refer to 

SN-18, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace sonar buzzer.  Refer to 

SN-51, "Removal and Installation"

.

2.

CHECK SONAR BUZZER CIRCUITS

1. Turn ignition switch OFF.

2. Disconnect sonar control unit connector and sonar buzzer connector.

3. Check continuity between sonar control unit harness connector

(A) and sonar buzzer harness connector (B).

4. Check continuity between sonar control unit harness connector

and ground.

Are the inspection results normal?

YES

>> Inspection End.

NO

>> Repair harness or connector.

Diagnosis Procedure (With Front and Rear Sonar System)

INFOID:0000000005146201

Regarding Wiring Diagram information, refer to 

SN-33, "Wiring Diagram"

.

1.

CHECK BUZZERS

Refer to 

SN-18, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

Connector

Terminal

Connector

Terminal

Continuity

B24 (A)

3

M47 (B)

2

Yes

7

1

AWNIA1576ZZ

Connector

Terminal

Continuity

B24

3, 7

Ground

No

AWNIA1504ZZ

SN-18

< COMPONENT DIAGNOSIS >

SONAR BUZZER CIRCUIT INSPECTION

NO

>> Replace buzzer.  Refer to 

SN-51, "Removal and Installation"

.

2.

CHECK BUZZER CIRCUITS

1. Turn ignition switch OFF.

2. Disconnect sonar control unit connectors and sonar buzzer connectors.

3. Check continuity between sonar control unit harness connectors

(A, B) and sonar buzzer harness connectors (C).

4. Check continuity between sonar control unit harness connectors

(A, B) and ground.

Are the inspection results normal?

YES

>> Inspection End.

NO

>> Repair harness or connector.

Component Inspection

INFOID:0000000005146202

SONAR BUZZER

1. Disconnect the sonar buzzer connector.

2. Check continuity between sonar buzzer terminals 1 and 2.

Connector

Terminal

Connector

Terminal

Continuity

B56 (A)

2

B166, M118 (C)

1

Yes

6

B166 (C)

2

B57 (B)

23

M118 (C)

AWNIA1545ZZ

Connector

Terminal

Continuity

B56 (A)

2, 6

Ground

No

B57 (B)

23

AWNIA1546ZZ

1 - 2

: Continuity should exist

WKIA4417E

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SONAR SYSTEM OFF SWITCH CIRCUIT INSPECTION

SN-19

< COMPONENT DIAGNOSIS >

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SONAR SYSTEM OFF SWITCH CIRCUIT INSPECTION

Description

INFOID:0000000005146203

The sonar system can be disabled by momentarily pressing the sonar system OFF switch. The sonar system

OFF indicator lamp will be illuminated when the sonar system is OFF.  Enabling the sonar system will cause

the sonar system OFF indicator to go out.  The indicator will flash if a malfunction exists in the system.

Diagnosis Procedure (With Rear Sonar System)

INFOID:0000000005146204

Regarding Wiring Diagram information, refer to 

SN-23, "Wiring Diagram"

.

1.

CHECK SONAR SYSTEM OFF SWITCH

Refer to 

SN-20, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace sonar system OFF switch.  Refer to 

IP-14, "Removal and Installation"

.

2.

CHECK SONAR SYSTEM OFF SWITCH CIRCUITS

1. Turn ignition switch OFF.

2. Disconnect sonar control unit connector and sonar system OFF switch connector.

3. Check continuity between sonar control unit harness connector

(A) and sonar system OFF switch harness connector (B).

4. Check continuity between sonar system OFF switch harness

connector and ground.

Are the inspection results normal?

YES

>> Inspection End.

NO

>> Repair harness or connector.

Diagnosis Procedure (With Front and Rear Sonar System)

INFOID:0000000005146205

Regarding Wiring Diagram information, refer to 

SN-33, "Wiring Diagram"

.

1.

CHECK SONAR SYSTEM OFF SWITCH

Refer to 

SN-20, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

Connector

Terminal

Connector

Terminal

Continuity

B24 (A)

4

M116 (B)

5

Yes

13

1

AWNIA1577ZZ

Connector

Terminal

Continuity

M116

1, 5

Ground

No

2, 6

Yes

AWNIA1578ZZ

SN-20

< COMPONENT DIAGNOSIS >

SONAR SYSTEM OFF SWITCH CIRCUIT INSPECTION

NO

>> Replace sonar system OFF switch.  Refer to 

IP-14, "Removal and Installation"

.

2.

CHECK SONAR SYSTEM OFF SWITCH CIRCUITS

1. Turn ignition switch OFF.

2. Disconnect sonar control unit connector and sonar system OFF switch connector.

3. Check continuity between sonar control unit harness connector

(A) and sonar system OFF switch harness connector (B).

4. Check continuity between sonar system OFF switch harness

connector and ground.

Are the inspection results normal?

YES

>> Inspection End.

NO

>> Repair harness or connector.

Component Inspection

INFOID:0000000005146206

SONAR SYSTEM OFF SWITCH

1. Disconnect the sonar system OFF switch connector.

2. Check continuity between the following switch terminals.

SONAR SYSTEM OFF INDICATOR

1. Disconnect the sonar system OFF switch connector.

2. Apply battery voltage to switch terminal 5.

3. Check the sonar system OFF indicator operation when switch

terminal 6 is connected to battery ground.

Connector

Terminal

Connector

Terminal

Continuity

B56 (A)

5

M116 (B)

5

Yes

11

1

ALNIA1087ZZ

Connector

Terminal

Continuity

M116

1, 5

Ground

No

2, 6

Yes

ALNIA1088ZZ

Sonar system OFF switch 

Terminals

Continuity

Depressed

1 - 2

Yes

Released

No

AWNIA0181ZZ

Terminals

Condition

Operation

Sonar system 
OFF switch

5

Battery voltage

Indicator ON

6

Ground

AWNIA0182ZZ