Nissan Frontier. Manual - part 1148

SN

POWER SUPPLY AND GROUND CIRCUIT

SN-9

< DTC/CIRCUIT DIAGNOSIS >

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DTC/CIRCUIT DIAGNOSIS

POWER SUPPLY AND GROUND CIRCUIT

Diagnosis Procedure

INFOID:0000000009480104

Regarding Wiring Diagram information, refer to 

SN-16, "Wiring Diagram"

.

1.

CHECK FUSE

Check that the following fuse is not blown.

Is the fuse blown?

YES

>> Replace the blown fuse after repairing the affected circuit.

NO

>> GO TO 2.

2.

CHECK POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect sonar control unit connector.

3. Check voltage between sonar control unit connector M93 and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness or connectors.

3.

CHECK GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Check continuity between sonar control unit connector M93 and ground.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Repair or replace harness or connectors.

Terminal No.

Signal name

Fuse No.

8

Ignition power supply

12 (10A)

Sonar control unit

Ground

Condition

Voltage

(Approx.)

Connector

Terminal

M93

8

—

Ignition switch: ON

Battery voltage

Sonar control unit

Ground

Continuity 

Connector

Terminal

M93

6

—

Yes

SN-10

< DTC/CIRCUIT DIAGNOSIS >

SONAR SENSOR CIRCUIT INSPECTION

SONAR SENSOR CIRCUIT INSPECTION

Description

INFOID:0000000009480105

With power and ground supplied to the sonar sensors, the sonar sensors transmit an ultrasonic signal. This

signal is reflected back to the sensor by objects large enough and close enough to be detected. The sonar

sensors measure the time from the transmitted signal to the time the signal is reflected back and send this

information to the sonar control unit. Refer to 

SN-5, "System Description"

 for more details.

Diagnosis Procedure

INFOID:0000000009480106

Regarding Wiring Diagram information, refer to 

SN-16, "Wiring Diagram"

.

1.

CHECK REAR SONAR SENSOR CIRCUITS

1. Turn ignition switch OFF.

2. Disconnect sonar control unit and rear sonar sensor connectors.

3. Check continuity between sonar control unit connector M93 and rear sonar sensor connectors.

4. Check continuity between sonar control unit connector M93 and ground.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Repair or replace harness or connectors.

Sonar control unit

Rear sonar sensor

Continuity

Connector

Terminal

Connector

Terminal

M93

10

C227 (LH outer)

2

Yes

15

3

16

1

11

C228 (LH inner)

2

15

3

16

1

12

C229 (RH inner)

2

15

3

16

1

9

C230 (RH outer)

2

15

3

16

1

Sonar control unit

Ground

Continuity

Connector

Terminal

M93

9

—

No

10

11

12

15

16

SN

SONAR BUZZER CIRCUIT INSPECTION

SN-11

< DTC/CIRCUIT DIAGNOSIS >

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SONAR BUZZER CIRCUIT INSPECTION

Description

INFOID:0000000009480107

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

causing the 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

INFOID:0000000009480108

Regarding Wiring Diagram information, refer to 

SN-16, "Wiring Diagram"

.

1.

CHECK REAR SONAR BUZZER

Perform the rear sonar buzzer component inspection. Refer to 

SN-11, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace rear sonar buzzer. Refer to 

SN-27, "Removal and Installation"

.

2.

CHECK REAR SONAR BUZZER CIRCUIT

1. Turn ignition switch OFF.

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

3. Check continuity between sonar control unit connector M93 and rear sonar buzzer connector M92.

4. Check continuity between sonar control unit connector M93 and ground.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Repair or replace harness or connectors.

Component Inspection

INFOID:0000000009480109

1.

CHECK REAR SONAR BUZZER

1. Turn ignition switch OFF.

2. Disconnect rear sonar buzzer connector.

3. Check resistance between rear sonar buzzer terminals.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace the rear sonar buzzer. Refer to 

SN-27, "Removal and Installation"

.

Sonar control unit

Rear sonar buzzer

Continuity

Connector

Terminal

Connector

Terminal

M93

3

M92

2

Yes

7

1

Sonar control unit

Ground

Continuity

Connector

Terminal

M93

3

—

No

7

Rear sonar buzzer terminals

Value

1

2

50

Ω ± 10Ω

SN-12

< DTC/CIRCUIT DIAGNOSIS >

SONAR SYSTEM OFF SWITCH CIRCUIT INSPECTION

SONAR SYSTEM OFF SWITCH CIRCUIT INSPECTION

Description

INFOID:0000000009480110

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

tem 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

INFOID:0000000009480111

Regarding Wiring Diagram information, refer to 

SN-16, "Wiring Diagram"

.

1.

CHECK SONAR SYSTEM OFF SWITCH

Perform the sonar system OFF switch component inspection. Refer to 

SN-13, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace sonar system OFF switch.

2.

CHECK SONAR SYSTEM OFF SWITCH ON/OFF AND STATUS LED CIRCUITS

1. Turn ignition switch OFF.

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

3. Check continuity between sonar control unit connector M93 and sonar system OFF switch connector

M94.

4. Check continuity between sonar system OFF switch connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness or connectors.

3.

CHECK SONAR SYSTEM OFF SWITCH GROUND CIRCUITS

Check continuity between sonar system OFF switch connector and ground.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Repair or replace harness or connectors.

Sonar control unit

Sonar system OFF switch

Continuity

Connector

Terminal

Connector

Terminal

M93

4

M94

5

Yes

13

1

Sonar control unit

Ground

Continuity

Connector

Terminal

M93

4

—

No

13

Sonar control unit

Ground

Continuity

Connector

Terminal

M93

2

—

Yes

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