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Home >> Mazda >> 2007 >> 6 Mazdaspeed >> Repair and Diagnosis >> Electrical >> Horns >> Instrumentation/Driver Info >> Instrument Cluster Input/Output Check Mode >> Inspection of Check Codes >> Check code 12

Check code 12

CHECK CODE 12 DIAGNOSTIC PROCEDURE

Check code 12  Operation signal to speedometer 
INSPECTION INDICATION SITUATION ACTION
Wait for 2 seconds  after selecting check code 12.
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Speedometer needle moves full scale then returns to 60 km/h or 60 MPH.  Speedometer is okay.
Other than stated above. Replace instrument cluster.
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