Remove the audio/navigation switch panel ^*1 or audio unit ^*2 .

*1: With navigation

*2: Without navigation

Disconnect the 5P connector (A) from the hazard warning switch (B).

Remove the two screws and the hazard warning switch.

Check for continuity between the terminals in each switch position according to the table.

If the continuity is not as specified, replace the hazard warning switch.

Install the switch in the reverse order of removal.