Terminal A and F Inspection

WARNING: This page is about a different car, the 2005 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

Measure the wave pattern of panel light control switch terminals A and F using an oscilloscope.
- Oscilloscope setting: 5 V/DIV (Y), 5 ms/div (X), DC range
Turn the light switch to the TNS or ON position.
Turn the panel light control switch to the brightest setting.

Fig 1: Identifying Panel Light Control Switch
Courtesy of MAZDA MOTORS CORP.
Verify that the wave pattern is as shown in the figure.

Fig 2: Wave Pattern Graph (Brightest Setting)
Courtesy of MAZDA MOTORS CORP.
Turn the panel light control switch to the darkest position and verify that the wave pattern is as shown in the figure.

Fig 3: Wave Pattern Graph (Darkest Setting)
Courtesy of MAZDA MOTORS CORP.