For 1990-2009 cars

#### Tools Required

J 39916-A CD and Cassette Diagnostic Audio Kit

### Motor Speed Test

The diagnostic tape in J 39916-A contains a two minute time period section marked for the purpose of checking the cassette tape motor playing speed. This portion of the diagnostic tape can be used to verify concerns of abnormal sound from the cassette tape player. In some cases, improper tape motor speed can cause audio abnormalities.

The tape motor speed is within tolerance, if the time taken for this test is between 1 minute and 56 seconds to 2 minutes and 1 second.