1. Connect the connector to the running light unit.
2. Connect the negative battery cable.
3. Measure the voltage at the running light unit using voltmeter.
4. If the value are not as specified in the Terminal Voltage List (Reference), inspect the parts under Action and related wiring harnesses.
5. If the system does not work properly even though the parts or related wiring harnesses do not have any malfunction, replace the running light unit.
Terminal Voltage List (Reference)



Running light unit removal/installationMazda 6 Service Manual: Essential Information
Introduction
Be careful not to hurt yourself when inspecting your vehicle, replacing a tire,
or doing some kind of maintenance such as car washing.
In particular, wear thick work gloves such as cotton gloves when touching areas
that are difficult to see while inspecting or working on your vehi ...
Mazda 6 Service Manual: Power steering fluid inspection
Fluid Level Inspection
1. Inspect the power steering fluid level.
Add fluid to the specified level as necessary.
Fluid specification
ATF M-III or equivalent (e.g. Dexron®II)
Fluid Leakage Inspection
1. Start the engine and let it idle.
2. Turn the steering wheel fully to the left and ...