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: Dsc hu/cm removal/installation
Caution When replacing the DSC HU/CM, configuration procedure must be done before removing the DSC HU/CM. If configuration is not completed before removing the DSC HU/CM, DTC B2477 will be detected. Do not drop the DSC HU/CM. Replace it if it is subjected to an impact. 1. Configura ...

Mazda 6 Service Manual: Transaxle range (tr) switch inspection
Operating Inspection 1. Verify that the starter operates only when the ignition switch is at the START position with the selector lever in P or N position. If not as specified, adjust the TR switch. 2. Verify that the back-up lights illuminate when shifted to R position with the ignition ...