Mazda 6 Service Manual: No.4 hard to start/long crank/erratic start/erratic crank

No.3 will not crank

No.5 engine stalls-after start/at idle

Other materials:

Mazda 6 Service Manual: Dtc c1145, c1155, c1165, c1175
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: Settings
NOTE Depending on the grade and specification, the screen display may differ. Select the icon on the home screen and display the Settings screen. Switch the tab and select the setting item you want to change. You can customize settings in the setup display as follows: ...