1. Disconnect the brake fluid level sensor connector from the master cylinder.
2. Inspect for continuity according to fluid level between the brake fluid level sensor terminals.

If not as indicated in the table, replace the reserve tank.

Brake Switch InspectionHood Disassembly/Assembly
Except Mazdaspeed3
1. Disassemble in the order indicated in the table.
1
Weather strip parting seal
2
Weather strip shroud seal
3
Fasteners A
4
Fasteners B
5
...
Passenger Compartment Temperature Sensor Removal/Installation [Full Auto Air
Conditioner]
1. Disconnect the negative battery cable..
2. Remove the following parts:
a. Front scuff plate.
b. Front side trim.
c. Dashboard under cover.
d. Upper panel.
e. Shift lever knob (MTX).
f. Selector lever knob (ATX).
g. Shift panel.
h. Side wall.
i. Console.
j. Hood release lever ...
Precaution
Intermittent Concern Troubleshooting
Vibration method
If a malfunction occurs or becomes worse while driving on a rough road or
when the engine is vibrating, perform the following steps.
NOTE:
There are several reasons why vehicle or engine vibration could cause an
electr ...