Diagnosis Procedure

Regarding Wiring Diagram Information, Refer To Wiring Diagram .

1. Check Each Door Motor Communication Signal
   
   
   1. Turn Ignition Switch On.
   2. Check Output Waveform Between A/C Auto Amp. Harness Connector And Ground With The Oscilloscope.

   +		-		Output Waveform
   A/C Auto Amp.
   Connector	Terminal
   M50	16	Ground		Courtesy of NISSAN NORTH AMERICA, INC.

   Is The Inspection Result Normal?

   Yes 

   Go To Step 2  .

   No 

   Go To Step   3  .

2. Check Each Door Motor Communication Signal Circuit For Open
   
   
   1. Turn Ignition Switch Off.
   2. Disconnect A/C Auto Amp. Connector And Intake Door Motor Connector.
   3. Check Continuity Between A/C Auto Amp. Harness Connector And Intake Door Motor Harness Connector.

      A/C Auto Amp.		Intake Door Motor		Continuity
      Connector	Terminal	Connector	Terminal
      M50	16	M128	2	Yes

   Is The Inspection Result Normal?

   Yes 

   Inspection End.

   No 

   Repair Harness Or Connector.

3. Check Each Door Motor Communication Signal Circuit For Short
   
   
   1. Disconnect Following Connectors:
      • Air Mix Door Motor (Driver Side)
      • Air Mix Door Motor (Passenger Side)
      • Mode Door Motor (Front)
      • Rear Shut-Off Door Motor
      • Air Mix Door Motor (Rear)
      • Mode Door Motor (Rear)
   2. Check Continuity Between A/C Auto Amp. Harness Connector And Ground.

      A/C Auto Amp.		-		Continuity
      Connector	Terminal
      M50	16	Ground		No

   Is The Inspection Result Normal?

   Yes 

   Replace A/C Auto Amp. Refer To Removal And Installation .

   No 

   Repair Harness Or Connector.