1. Disconnect the negative battery cable if equipped with power window system.
2. Remove the regulator handle if equipped.
3. Open the cap using a small screwdriver, then remove the screw.
4. Remove the inner handle cover.
5. Remove the cover, then remove screw.
6. Disengage clips A from the rear door using a fastener remover.
7. Pull the rear door trim upward, then disengage hooks B from the rear door.
8. Disconnect the power window subswitch connector if equipped.
9. Remove the rear door trim.
10. Remove the switch panel from the rear door trim.
11. Install in the reverse order of removal.
Mazda 6 Service Manual: Dtc c1148, c1158, c1168, c1178, c1233, c1234, c1235, c1236
Caution
When attaching the tester lead to the ABS (ABS/TCS) HU/CM harness
connector, the SST (49 G066 001) must be used. (See ABS (ABS/TCS) HU/CM
INSPECTION.)
Diagnostic procedure
...
Mazda 6 Service Manual: Auto Lock/Unlock Function
WARNING
Do not pull the inner handle on a front door: Pulling the inner handle
on a front door while the vehicle is moving is dangerous. Passengers can fall out
of the vehicle if the door opens accidentally , which could result in death or serious
injury.
When the vehicle speed exceeds 20 ...