Check Communication Line

1. Turn ignition switch OFF.
2. Disconnect connectors for driver door control unit (LCU01) and malfunctioning door control unit.
3. Check continuity between driver door control unit (LCU01) connector and malfunctioning door control unit connector.
   CONTINUITY CHART
   
   

   Terminal				Continuity
   Driver door control unit (LCU01)		Passenger door control unit
   Connector	Terminal (Wire color)	Connector	Terminal (Wire color)
   D8	5 (G/OR)	D38	11 (G/OR)	Yes

   CONTINUITY CHART
   
   

   Terminal				Continuity
   Driver door control unit (LCU01)		Rear door control unit
   Connector	Terminal (Wire color)	Connector	Terminal (Wire color)
   D8	5 (G/OR)	D58 (LH) D78 (RH)	11 (G/OR)	Yes

   Fig 1: Checking Continuity Between Driver Door Control Unit (LCU01) Connector And Malfunctioning Door Control Unit Connector

   Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

• OK : GO TO 2.
• NG : Repair or replace harness.

1. Connect driver door control unit (LCU01) and malfunctioning door control unit connector.
2. Check the signal between malfunctioning door control unit connector and ground with oscilloscope.
   TERMINAL SIGNAL CHART
   
   

   Passenger door control unit	Terminal			Signal (Reference value)
   	(+)		(-)	Courtesy of NISSAN MOTOR CO., U.S.A.
   	Connector	Terminal (Wire color)	Ground
   	D38	11 (G/OR)
   Rear LH, RH door control unit	Terminal
   	(+)		(-)
   	Connector	Terminal (Wire color)	Ground
   	D58 (LH) D78 (RH)	11 (G/OR)

   Fig 2: Checking Signal Between Malfunctioning Door Control Unit Connector And Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

• OK : Communication signal is OK.
• NG :
  • All door control unit (passenger, rear LH and RH) are NG. --> Replace Driver door control unit.
  • Any of door control unit (passenger, rear LH or RH door control unit) are NG. --> Replace malfunctioning door control unit.