Auto Leveling Sensor Inspection

WARNING: This page is about a different car, the 2016 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE 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 Three Dry Cell Batteries In Series
Courtesy of MAZDA MOTORS CORP.
Connect the positive pole of the dry cell batteries to auto leveling sensor terminal C, and the negative pole to terminal A.

Fig 2: Connecting Positive Pole Of Dry Cell Batteries To Auto Leveling Sensor Terminal C
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.
Verify that the voltage fluctuates linearly between 0.5-4.5 V as shown in the figure when slowly moving the auto leveling sensor link upward or downward.

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