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: Generator removal/installation
Warning When the battery cables are connected, touching the vehicle body with generator terminal B will generate sparks. This can cause personal injury, fire, and damage to the electrical components. Always disconnect the battery negative cables before performing the following operation. ...

Mazda 6 Service Manual: Refrigerant pressure switch removal/installation
1. Remove the battery. 2. Discharge the refrigerant from the system. (See RECOVERY.) (See CHARGING.) 3. Loosen the refrigerant pressure switch using two spanners. 4. Remove in the order indicated in the table. 5. Install in the reverse order of removal. Refrigerant Pressure Switch Installat ...