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Diagnostic Procedure

*AMPLIFIER PRETEST - DIAGNOSTIC PROCEDURE

TEST ACTION APPLICABILITY
1
NOTE: Perform this test if the vehicle is experiencing a problem with no sound or poor sound quality from a speaker or channel.
Turn the ignition on.Turn the radio on.With the DRBIII® enter Body, Audio Systems, Digital Audio Amplifier then System Tests.With the DRBIII® enter any one of the amplifier tests.
NOTE: The Continuous Tone test will send a continuous tone to each speaker. This test will verify the integrity of an individual speaker channel, but will not display any fault messages.
NOTE: The PCI Amplifier Test will detect a Software Checksum Failure, and will a display fault message.
NOTE: The Identify EQ Test will return the current EQ mode, and will display a fault message.
NOTE: The Input test will detect activity on the amplifier input channels. This test will verify the integrity of the input channels.
Did the DRBIII® display a fault message?
  1. Yes: Perform the appropriate corresponding test.

    Perform BODY VERIFICATION TEST VER-1 .

  2. No: If the DRBIII® does not display a fault message and the vehicle is experiencing a problem with a speaker or channel, refer to SCHEMATIC DIAGRAMS to help isolate a possible open in the wiring to the affected speaker or channel.

    Perform BODY VERIFICATION TEST VER-1 .

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