Caution
Note
1. Remove the transmitter cover.
2. Apply the circuit tester leads to the positions as indicated in the figure.

3. While pressing the battery as shown in the figure, press the LOCK and UNLOCK buttons on the transmitter at the same time to start measurement of the voltage.

4. Release the buttons after 5 seconds.
5. Verify that the minimum voltage is the standard voltage or more for 10 seconds
after starting measurement.
Standard voltage
2.7 V
Transmitter battery replacement
Trunk lidMazda 6 Service Manual: Obd drive mode
Performing the Drive Mode inspects the OBD system for proper operation.
The Drive Mode must be performed to ensure that no additional DTCs are
present.
During Drive Mode, the following systems are inspected:
- Oxygen sensor (HO2S)
- Oxygen sensor heater
- Catalytic converter (TW ...