The car is equipped with a three-phase alternator with electromagnetic excitation, with a built-in rectifier unit and an electronic voltage regulator

The fan impeller and drive pulley are located on the generator shaft.

The shaft is mounted on closed-type bearings that do not require additional lubrication during the entire service life. The shaft is driven in rotation from the crankshaft pulley by a V-shaped belt.

In addition to the electronic controller built into the generator, the electronic engine unit additionally controls the operating modes of the generator.

The electronic unit automatically increases the output voltage of the generator at a low ambient temperature for more efficient recharging of the battery.

The electronic unit turns off the generator when the engine is started, and also increases the engine crankshaft speed at idle with a large electrical load on the generator

In case of any malfunctions of the power supply system and when the ignition is switched on with the engine not running, the engine control unit turns on the battery discharge alarm

Mazda 6 generator connection diagram

Possible generator malfunctions and solutions

When the ignition is switched on, the battery discharge indicator does not light

- wire breakage between the engine control unit and the alarm

Eliminate the breakage

- the alarm burned out

Replace the alarm

The battery discharge alarm does not go off after starting the engine

- weak belt tension of the drive of auxiliary units

Replace the belt

- the generator is faulty (the generator brushes wear out or do not fit tightly to the contact rings; the generator excitation winding has burned out, the diode bridge or voltage regulator is faulty)

Replace or repair the generator

- wire breakage between the engine control unit and the generator, between the generator and the battery, or between the generator and the mounting block in the cabin

Eliminate the breakage

- the electronic engine control unit is faulty

Replace the electronic unit

- the mounting block in the cabin is faulty

Replace the mounting block

The generator does not provide battery power

- oxidation of battery terminals

Clean and lubricate the wire tips and battery terminals with technical vaseline

- the battery is faulty

Replace the battery

- weak belt tension of the drive of auxiliary units

Replace the belt

- the mounting block in the cabin is faulty

Replace the mounting block

- the generator voltage regulator or the electronic engine control unit is faulty

Replace faulty parts

The battery is being recharged

- the generator voltage regulator or the electronic engine control unit is faulty

Replace faulty parts

- increased voltage drop in the generator - battery circuit

Check the ignition lock, fuse and relay mounting block, check the connection of the generator housing to the "mass"

Removing and installing the generator

Disconnect the negative wire from the battery

We remove the alternator drive belt as described in the article "How to check and replace the drive belt of Mazda 6 auxiliary units"

How to replace the Mazda car generator 6

We remove the plastic cap of the generator wire tip

How to replace the Mazda car generator 6

Unscrew the nut securing the tip of the power wire and disconnect the wire from the output of the generator

How to replace the Mazda 6How to replace the Mazda 6 car generator

We press the latch and disconnect the tip of the excitation wire of the generator winding

How to replace the Mazda 6How to replace the Mazda 6 car generator

Unscrew the generator mounting bolts

The arrows show the location of the generator mounting bolts to the cylinder block

How to replace the Mazda car generator 6

Removing the generator

Installing the generator and all the parts in reverse order