Circuit Diagnosis Procedure
WARNING: This page is about a different car, the 2019 Nissan NV3500 HD, 2019 Nissan NV2500 HD, and 2019 Nissan NV1500. However, it is still accessible from the selected car via links, so may be relevant.
INSPECTION FOR POWER SUPPLY AND GROUND CIRCUIT
- CHECK FUSES
Check for blown sonar system fuse.
Unit
Power Source
Fuse
Location
Sonar control unit
ON or START
12
Fuse block (J/B)
Is the fuse blown?
YES
Replace the fuse after repairing the affected circuit.
NO
GO TO 2.
- CHECK POWER SUPPLY CIRCUIT
- Disconnect sonar control unit connector M115.
- Turn ignition switch ON.
- Check voltage between sonar control unit connector M115 terminal 13 and ground.
Terminals
Voltage
(approx.).
(+)
(-)
Connector
Terminal
M115
13
Ground
Battery voltage
Is the inspection result normal?
YES
GO TO 3.
NO
Check harness for open between sonar control unit and fuse.
- CHECK GROUND CIRCUIT
- Turn ignition switch OFF.
- Check continuity between sonar control unit M115 terminal 24 and ground.
Terminals
Continuity
(+)
(-)
Connector
Terminal
M115
24
Ground
Yes
Is the inspection result normal?
YES
Inspection End.
NO
Check harness ground circuit, repair if needed.