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: Cell Phones
WARNING
Please comply with the legal regulations concerning the use of communication
equipment in vehicles in your country: Use of any electrical devices such
as cell phones, computers, portable radios, vehicle navigation or other devices
by the driver while the vehicle is moving is dangerous ...
Mazda 6 Service Manual: Combine sensor initialization procedure
1. Set the SST (WDS or equivalent) to the DLC-2
2. Access the active command mode and select the YAWRATE, then follow the
indication on the monitor.
3. Select the LATACCEL and follow the indication on the monitor.
STEERING ANGLE SENSOR REMOVAL/INSTALLATION
(See COMBINATION SWITCH DISASSEMBLY ...