1. Measure the voltage at the door lock timer unit terminals (other than terminal 1E and 2W) as indicated below.
2. Disconnect the negative battery cable.
3. Disconnect the door lock timer unit connector and inspect for continuity between terminal 1E or 2W and the bracket.
4. Inspect for continuity at terminal 1E and 2W as indicated below.
5. If the parts and wiring harnesses are okay but the system still does not work properly, perform the troubleshooting.
Terminal voltage list (Reference)



*1 : Vehicles with double locking system
*2 : Vehicles with theft-deterrent system
Door lock timer unit removal/installation
Door lock timer unit id code changeMazda 6 Service Manual: When Trunk Lid Cannot be Opened
If the vehicle battery is dead or there is a malfunction in the electrical system
and the trunk lid cannot be opened, perform the following procedure as an emergency
measure to open it:
1. Open the cover.
2. Move the lever to the left to fold the seatback.
3. Move the lever to the left to o ...
Mazda 6 Service Manual: Control system
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