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: Dtc c1095, c1096
Caution When attaching the tester lead to the DSC HU/CM connector the SST (49 G066 004) must be used. Diagnostic procedure ...

Mazda 6 Service Manual: Magnetic clutch adjustment
1. Measure the clearance around the entire circumference between the pressure plate and A/C compressor pulley using a thickness gauge. 2. Verify that the clearance is within the specification. If not within the specification, remove the pressure plate and adjust the clearance by changing ...