Diagnosis Procedure

Regarding Wiring Diagram information, refer to WIRING DIAGRAM .

1. CHECK RAIN SENSOR FUSE
   
   
   1. Turn ignition switch OFF.
   2. Check the following fuse.

      Unit	Location	No.	Amps
      Rain sensor	Fuse block (J/B)	14	5 A

   Is the inspection result normal?

   YES 

   GO TO STEP 2  .

   NO 

   Replace the fuse after repairing the applicable circuit.

2. CHECK RAIN SENSOR POWER SUPPLY
   
   
   1. Disconnect rain sensor connector.
   2. Check voltage between rain sensor harness connector and ground.

      (+)		(-)	Voltage (Approx.)
      Rain sensor
      Connector	Terminal
      R12	1	Ground	Battery voltage

   Is the inspection result normal?

   YES 

   GO TO STEP 3  .

   NO 

   Repair or replace harness.

3. CHECK RAIN SENSOR GROUND CIRCUIT
   
   

   Check continuity between rain sensor harness connector and ground.

   Rain sensor		Ground	Continuity
   Connector	Terminal
   R12	3		Yes

   Is the inspection result normal?

   YES 

   GO TO STEP 4  .

   NO 

   Repair or replace harness.

4. CHECK RAIN SENSOR SIGNAL
   
   
   1. Connect rain sensor connector.
   2. Turn ignition switch ON.
   3. Check signal between BCM harness connector and ground with oscilloscope.

      (+)		(-)	Condition	Signal (Reference value)
      BCM
      Connector	Terminal
      M19	55	Ground	Ignition switch ON	Courtesy of NISSAN NORTH AMERICA, INC. Approx. 8.7V

   Is the inspection result normal?

   YES 

   Replace rain sensor. Refer to REMOVAL AND INSTALLATION .

   NO 

   GO TO STEP 5  .

5. CHECK RAIN SENSOR SIGNAL CIRCUIT FOR OPEN
   
   
   1. Turn ignition switch OFF.
   2. Disconnect BCM connector and rain sensor connector.
   3. Check continuity between BCM harness connector and rain sensor harness connector.

      BCM		Rain sensor		Continuity
      Connector	Terminal	Connector	Terminal
      M19	55	R12	2	Yes

   Is the inspection result normal?

   YES 

   GO TO STEP 6  .

   NO 

   Repair or replace harness.

6. CHECK RAIN SENSOR SIGNAL CIRCUIT FOR SHORT
   
   

   Check continuity between BCM harness connector and ground.

   BCM		Ground	Continuity
   Connector	Terminal
   M19	55		No

   Is the inspection result normal?

   YES 

   Replace BCM. Refer to REMOVAL AND INSTALLATION .

   NO 

   Repair or replace harness.