Diagnosis Procedure

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

1. CONNECTOR CHECK

   Check the audio unit and speaker connectors for the following:

   • Proper connection
   • Damage
   • Disconnected or loose terminals

   Is the inspection result normal? 

   YES: GO TO 2.

   NO: Repair the terminal and connector.

2. HARNESS CHECK
   1. Disconnect audio unit connector M38 (A) and suspect speaker connector (B).
   2. Check continuity between audio unit harness connector M38 (A) terminal and suspect speaker harness connector (B) terminal.

      A		B		Continuity
      Connector	Terminal	Connector	Terminal
      M38	2	D12	1	Yes
      	3		2
      	11	D112	1
      	12		2

      Fig 1: Checking Continuity Between Audio Unit Connector M38 (A) Terminals And Suspect Speaker Connector (B) Terminals

      Courtesy of NISSAN NORTH AMERICA, INC.
   3. Check continuity between audio unit harness connector M38 (A) terminal and ground.

      A		-	Continuity
      Connector	Terminal
      M38	2	Ground	No
      	3
      	11
      	12

   Are continuity results as specified? 

   YES: GO TO 3

   NO: Repair harness or connector.

3. FRONT SPEAKER SIGNAL CHECK
   1. Connect audio unit connector and front speaker connector.
   2. Turn ignition switch to ACC.
   3. Push "POWER" switch.
   4. Check the signal between audio unit harness connector terminals with CONSULT or oscilloscope.

      Connector	Terminal		Condition	Reference signal
      	(+)	(-)
      M38	2	3	Receive audio signal
      	11	12

   Fig 2: Checking Signal Between Audio Unit Connector Terminals Using Oscilloscope

   Courtesy of NISSAN NORTH AMERICA, INC.

   Is the audio signal voltage as specified? 

   YES: Replace speaker. Refer to "REMOVAL AND INSTALLATION ".

   NO: Replace audio unit. Refer to "REMOVAL AND INSTALLATION ".