I performed the steps in TSB 91-05-15 and one there was an error. (I had previously performed basically the same steps in 91-04-03 and missed this error) On page 5 of 18, it states that the loudspeaker must pulse. My loudspeaker did not pulse. It then states:
If loudspeaker does not pulse and the radio is functioning OK;
The problem may be with the radio coding.- Recheck radio coding and then recheck for radio DTCs.
How do I recheck radio coding?