Mazda 2: Electrical System
Electrical Parts
Battery cable
- Before disconnecting connectors or removing electrical parts, disconnect
the negative
battery cable.

Wiring Harness
- To remove the wiring harness from the clip in the engine room, pry up
the hook of the
clip using a flathead screwdriver.

CAUTION:
- Do not remove the wiring harness protective tape. Otherwise, the wires
could rub
against the body, which could result in water penetration and electrical
shorting.

Connectors
Disconnecting connectors
- When disconnecting a connector, grasp the connectors, not the wires.

- Connectors can be disconnected by pressing or pulling the lock lever as
shown.

Locking connector
- When locking connectors, listen for a click indicating they are securely
locked.

Inspection
CAUTION:
- To prevent damage to the terminal, wrap a thin wire around the tester
probe before
inserting into terminal.
- When a tester is used to inspect for continuity or measuring voltage,
insert the tester
probe from the wiring harness side.

- Inspect the terminals of waterproof connectors from the connector side
since they
cannot be accessed from the wiring harness side.

Terminals
Inspection
- Pull lightly on individual wires to verify that they are secured in the
terminal.

Replacement
- Use the appropriate tools to remove a terminal as shown. When installing
a terminal,
be sure to insert it until it locks securely.
- Insert a thin piece of metal from the terminal side of the connector and
with the
terminal locking tab pressed down, pull the terminal out from the connector.

Sensors, Switches, and Relays
- Handle sensors, switches, and relays carefully. Do not drop them or
strike them against
other objects.

Wiring Harness
Wiring color codes
- Two-color wires are indicated by a two-color code symbol.
- The first letter indicates the base color of the wire and the second is
the color of the
stripe.



Fuse
Replacement
- When replacing a fuse, be sure to replace it with one of the same
capacity. If a fuse
malfunctions again, the circuit probably has a short and the wiring should
be inspected.
- Be sure the negative battery terminal is disconnected before replacing a
main fuse.

- When replacing a pullout fuse, use the fuse puller.

Viewing orientation for Connectors
- The viewing orientation for connectors is indicated with a symbol.
- The figures showing the viewing orientation are the same as those used
in Wiring
Diagrams.
- The viewing orientations are shown in the following three ways.
Part-side connector
The viewing orientation for part-side connectors is from the terminal side.

* Part names are shown only when there are multiple connector drawings.
Vehicle harness-side connector
The viewing orientation for vehicle wiring harness-side connectors is from
the wiring harness side.

* Part names are shown only when there are multiple connector drawings.
Other
When it is necessary to show the terminal side of the vehicle wiring
harness-side connectors, such as
the following connectors, the viewing orientation is from the terminal side.

- Main fuse block and the main fuse block relays
- Data link connector
- Check connector
- Relay box
Electrical Troubleshooting Tools
Jumper wire
CAUTION:
- Do not connect a jumper wire from the power source line to a body
ground. This may
cause burning or other damage to wiring harnesses or electronic components.
- A jumper wire is used to create a temporary circuit. Connect the jumper
wire between
the terminals of a circuit to bypass a switch.

Voltmeter
- The DC voltmeter is used to measure circuit voltage. A voltmeter with a
range of 15 V
or more is used by connecting the positive (+) probe (red lead wire) to the
point
where voltage will be measured and the negative (-) probe (black lead wire)
to a body
ground.

Ohmmeter
CAUTION:
- Do not connect the ohmmeter to any circuit where voltage is applied.
This will damage
the ohmmeter.
- The ohmmeter is used to measure the resistance between two points in a
circuit and to
inspect for continuity and short circuits.

Precautions Before Welding
A vehicle has various electrical parts. To protect the parts from excessive
current generated when
welding, be sure to perform the following procedure.
1. Switch the ignition to off.
2. Disconnect the battery cables.

3. Securely connect the welding machine ground near the welding area.

4. Cover the peripheral parts of the welding area to protect them from weld
spatter.
READ NEXT:
Jacking Positions
WARNING:
Improperly jacking a vehicle is dangerous. The vehicle can slip off the
jack and cause serious injury. Use only the correct front and rear
jacking points and block the
Vehicle Identification Number (VIN)
The VIN marking position is located on the floor on the front
passenger-side.
If the VIN plate is adhered to the dashboard, it is located in the
position
Pre-Delivery Inspection Table
Exterior
INSPECT and ADJUST, if necessary, the following items to specification:
Glass, exterior bright metal and paint for damage
Wheel lug nuts
All weatherstrips fo
SEE MORE:
Your vehicle is equipped with radar sensors (rear). The following systems
also use the radar
sensors (rear).
Blind Spot Monitoring system (BSM)
Rear Cross Traffi c Alert (RCTA)
The radar sensors (rear) function by detecting the radio waves refl ected off
a vehicle
approaching from the
AIR INTAKE DUCT REMOVAL/INSTALLATION
1. Set the air intake mode to REC.
2. Disconnect the negative battery cable.
3. Remove the following parts:
Glove compartment (See GLOVE COMPARTMENT REMOVAL/INSTALLATION).
Dashboard under cover (See DASHBOARD UNDER COVER
REMOVAL/INSTALLATION).
Heat duct (R
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