Your Vehicle: 2009 Nissan-Datsun Altima V6-3.5L (VQ35DE)
 
Vehicle » A L L Diagnostic Trouble Codes ( DTC ) » Testing and Inspection » U Code Charts » U124C  
 
 
  U124C  
 

U124C CD CHANGER

Description
Refer to See: Accessories and Optional Equipment\Entertainment Systems\Description and Operation\Multi AV System (Coupe)\System Description.

DTC Logic

DTC DETECTION LOGIC

  

Diagnosis Procedure
1.CHECK CD CHANGER POWER SUPPLY AND GROUND CIRCUIT
Check CD changer power supply and ground circuit. Refer to See: Accessories and Optional Equipment\Radio, Stereo, and Compact Disc\Testing and Inspection\Component Tests and General Diagnostics\Power Supply And Ground Circuit (Coupe)\CD Changer.
Do power and ground check OK?
YES >> GO TO 2
NO >> Repair power supply or ground circuit.
2.CHECK COMMUNICATION CIRCUIT CONTINUITY

  1. Turn ignition switch OFF.
  2. Disconnect CD changer connector M42 and AV control unit connector M48.

  

  1. Check continuity between CD changer harness connector M42 (A) terminals 8, 9 and 10 and AV control unit harness connector

M48 (B) terminals 69, 70 and 72.

  

  1. Check continuity between CD changer harness connector M42 (A) terminals 8, 9, 10 and ground.

8, 9, 10 - Ground : Continuity should not exist.

Are the continuity test results as specified?
YES >> GO TO 3
NO >> Repair harness or connector.
3.CHECK REQUEST SIGNAL

  1. Connect CD changer connector and AV control unit connector.
  2. Turn ignition switch ON.

  

  1. Check signal between CD changer harness connector M42 terminal 8 and ground.

  

8 - Ground

Are the voltage readings as specified?
YES >> GO TO 4
NO >> Replace CD changer. Refer to See: Accessories and Optional Equipment\Radio, Stereo, and Compact Disc\Service and Repair\CD Changer.
4.CHECK COMMUNICATION SIGNAL

  

Check signal between CD changer harness connector M42 terminal
9 and ground.

9 - Ground

  

Are the voltage readings as specified?
YES >> GO TO 5
NO >> Replace CD changer. Refer to See: Accessories and Optional Equipment\Radio, Stereo, and Compact Disc\Service and Repair\CD Changer.
5.CHECK COMMUNICATION SIGNAL

  

Check signal between CD changer harness connector M42 terminal
10 and ground.

10 - Ground

  

Are the voltage readings as specified?
YES >> Inspection End.
NO >> Replace AV control unit. Refer to See: Accessories and Optional Equipment\Radio/Stereo\Service and Repair\Audio Unit\Bose Audio With Navigation.