Power Supply and Ground Circuit Check for Third Row Power Folding Seat Control Unit

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

1. CHECK FUSES AND FUSIBLE LINK 

   Check for blown fuses or fusible link.

   Unit	Power source	Fuse or Fusible Link	Location
   Third row power folding seat control unit	Battery	F	Fuse and fusible link box
   		19	Fuse block (J/B)
   	Ignition switch ON or START	14

   Are any fuses or fusible links blown? 

   YES: Install new fuse. Eliminate cause of malfunction if fuse blows again.

   NO: GO TO 2

2. POWER SUPPLY CIRCUIT CHECK 
   1. Disconnect third row power folding seat control unit connectors B401 and B402.
   2. Check voltage between third row power folding seat control unit harness connectors B401, B402 terminals 1, 8, 13, 14 and ground.

      Terminals			Ignition switch position
      (+)		(-)	OFF	ON	START
      Connector	Terminal
      A: B401	1	Ground	Battery voltage
      	8		0V	Battery voltage
      B: B402	13		Battery voltage
      	14		Battery voltage

      Fig 1: Checking Voltage Between Third Row Power Folding Seat Control Unit Harness Connectors B401, B402 Terminals And Ground

      Courtesy of NISSAN NORTH AMERICA, INC.

      Are the inspection results normal? 

      YES: GO TO 3

      NO: Check harness for open between third row power folding seat control unit and fuse or fusible link.

3. GROUND CIRCUIT CHECK 
   1. Turn ignition switch OFF.
   2. Check continuity between third row power folding seat control unit harness connector B402 terminals 16, 18, 21 and ground.
      Fig 2: Checking Continuity Between Third Row Power Folding Seat Control Unit Harness Connector B402 Terminals 16, 18, 21 And Ground

      Courtesy of NISSAN NORTH AMERICA, INC.

      Terminals			Continuity
      (+)		(-)
      Connector	Terminal
      B402	16	Ground	Yes
      	18
      	21

      Do all terminals have ground? 

      YES: Inspection End.

      NO: Repair or replace harness.