1. Disconnect the negative battery cable..
2. Disconnect the connector..
3. Verify the resistance between bass-box terminals.

If not within the specification, replace the bass-box.

0.9—1.1 ohms
Auxiliary Jack/Usb Port Removal/Installation
Bass Box Removal/InstallationError Indications (Type A)
If you see an error indication on the
display, find the cause in the chart. If you
cannot clear the error indication, take the
vehicle to an Authorized Mazda Dealer.
Indication
Cause
Solution
CHECK
USB
USB device
malfunction
Verify that the content
...
Magnetic Clutch Disassembly/Assembly [Full Auto Air Conditioner]
1. Disassemble in the order indicated in the table.
SKYACTIV-G 2.0
1
Bolt
(See Bolt Removal/Installation Note.)
2
Pressure plate
3
Shim
(See Shim Installation Note.)
4
Snap ring
...
Crankshaft Position (CKP) Sensor Inspection [Mzr 2.0, Mzr 2.5]
Visual Inspection
CAUTION:
When foreign material such as an iron chip is on the CKP sensor, it can cause
abnormal output from the sensor because of flux turbulence and adversely affect
the engine control. Be sure there is no foreign material on the CKP sensor when
replacing.
...