Use the same procedure for the RH and LH sides.
The procedure listed below is for the LH side.
86160P
1.INSPECT FRONT NO. 2 SPEAKER ASSEMBLY
When there is a malfunction such as noise from a speaker or no sound at all, replace the speaker with a new one and check that the malfunction disappears.
Malfunction disappears.
Connect the connectors to the front No. 2 speaker assemblies.
When there is a possibility that either the right or left front No. 2 speaker assembly is defective, inspect by interchanging the right one with the left one.
Perform the inspection above on both the LH and RH sides.