Auto Leveling Sensor Inspection

WARNING: This page is about a different car, the 2017 Mazda CX-9. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
Remove the auto leveling sensor. (See AUTO LEVELING SENSOR REMOVAL/INSTALLATION .)
Prepare three dry cell batteries (1.5 V).
Connect the three dry cell batteries in a series.

Fig 1: Connecting Dry Cell Batteries In Series
Courtesy of MAZDA MOTORS CORP.
Connect the positive pole of the dry cell battery to auto leveling sensor terminal C, and the negative pole to terminal A.

Fig 2: Connecting Positive Pole Of Dry Cell Battery To Auto Leveling Sensor Terminal C And Negative Pole To Terminal A
Courtesy of MAZDA MOTORS CORP.
Connect the tester as shown in the figure with approx. 4.5 V of voltage applied between auto leveling sensor terminals A and C, and measure the voltage at auto leveling sensor terminal B.

Fig 3: Measuring Voltage At Auto Leveling Sensor Terminal B
Courtesy of MAZDA MOTORS CORP.
When slowly moving the auto leveling sensor link up and down, verify that the voltage fluctuates linearly between 0.5-4.5 V as shown in the figure.

Fig 4: Auto Leveling Sensor Voltage Graph
Courtesy of MAZDA MOTORS CORP.
- If the voltage cannot be verified as indicated in the graph, replace the auto leveling sensor. (See AUTO LEVELING SENSOR REMOVAL/INSTALLATION .)