Inspection For Power Supply And Ground Circuit

WARNING: This page is about a different car, the 2005 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FUSES

Check for blown rear sonar system fuses.

FUSE SPECIFICATION CHART

UNIT	POWER SOURCE	FUSE
Sonar control unit	ON or START	12

Refer to "WIRING DIAGRAM - SONAR - ".

OK or NG

OK: GO TO 2.
NG: If fuse is blown, be sure to eliminate cause of problem before installing new fuse. Refer to "POWER SUPPLY ROUTING CIRCUIT ".

CHECK POWER SUPPLY CIRCUIT
1. Disconnect sonar control unit connector.
2. Check voltage between sonar control unit connector B56 terminal 8 (G) and ground.
  
  Fig 1: Checking Voltage Between Terminal 8 & Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 2: Terminal Voltage Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK: GO TO 3.
- NG: Check harness for open or short between sonar control unit and fuse.
CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between sonar control unit connector B56 terminal 6 and ground.
  
  Fig 3: Checking Continuity Between Terminal 6 & Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 4: Terminal Continuity Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK: Inspection End.
- NG: Check harness ground circuit.