Nissan Frontier. Instruction — 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
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
for more details.
Diagnosis Procedure
INFOID:0000000009480106
Regarding Wiring Diagram information, refer to
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
1.
CHECK REAR SONAR BUZZER
Perform the rear sonar buzzer component inspection. Refer to
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
1.
CHECK SONAR SYSTEM OFF SWITCH
Perform the sonar system OFF switch component inspection. Refer to
.
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
6
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