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Diagnosis Procedure

DIAGNOSIS PROCEDURE

Step Action YES NO
1  SPEAKER HARNESS CHECK 
  1. Disconnect audio unit connector M64 and suspect speaker connector.
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  1. 2. Check continuity between audio unit harness connector M64 (A) and suspect speaker harness connector (B).
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  1. 3. Check continuity between audio unit harness connector M64 (A) and ground.
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Are continuity test results as specified? 		 GO TO 2
  • Check connector housings for disconnected or loose terminals.
  • Repair harness or connector.
2  SPEAKER SIGNAL CHECK 
  1. Connect audio unit connector and audio amp. connector.
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  1. 2. Turn ignition switch ACC.
  2. 3. Push "POWER" switch.
  3. 4. Check the signal between audio unit harness connector M64 terminals with SDT or oscilloscope.
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Are the audio signal voltage readings as specified? 		 Replace suspect speaker. Refer to [FRONT TWEETER: REMOVAL AND INSTALLATION ]. Replace audio unit. Refer to [AUDIO UNIT: REMOVAL AND INSTALLATION ].
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