Volume does not increase with speed
NOTE:
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Test-drive the vehicle at highway speeds and monitor if the volume increases.
Does the volume increase?
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YES
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-
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Intermittent failure, the system is OK at this time.■
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NO
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-
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-
Verify SVC mode setting in audio unit sound adjustment set-up.
YES
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-
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Change setting to MID and retest.■
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NO
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-
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-
Turn the ignition switch to LOCK (0).
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NOTE: Eject the CD before removing the audio unit to prevent damaging the CD player's load mechanism.
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Turn the ignition switch to ON (II).
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Drive the vehicle and have an assistant measure the voltage at audio unit connector A (24P) terminal No. 15.
YES
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-
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NO
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-
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Repair opens or shorts in the wire between audio unit connector A (24P) No. 15 terminal and ECM/PCM connector A (49P) No. 30 terminal. If no opens are found,
substitute a known-good ECM/PCM
and recheck. If the symptom/indicated goes away, replace the original
ECM/PCM.
■
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