Mazda 6 Service Manual: No.20 noise occurs at idle when vehicle is stopped in all positions/ranges

No.19 excessive shift shock on torque converter clutch (tcc)

No.21 noise occurs at idle when vehicle is stopped in d, s, l ranges, or in r position

Other materials:

Mazda 6 Service Manual: Instrument cluster input/output check mode
Note In this mode, it is possible to check the items in the following chart. Diagnostic Trouble Code Chart Note Diagnostic trouble codes which are not listed may be indicated, but they cannot be inspected. The diagnostic trouble codes are displayed in numerical order. (While ...

Mazda 6 Service Manual: Light switch inspection
Light switch LH side 1. Remove the light switch. (See LIGHT SWITCH REMOVAL/INSTALLATION) 2. Inspect for continuity between the light switch terminals using an ohmmeter. If not as specified, replace the light switch. Headlight switch Turn switch Light switch RH side 1. Remove th ...