Steering Angle Sensor Inspection

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

If the steering angle sensor is removed from the clock spring, the steering angle sensor absolute angle could change, therefore, do not remove the steering angle sensor from the clock spring.
If the steering angle sensor is replaced, replace it together with the clock spring. (See CLOCK SPRING REMOVAL/INSTALLATION [STANDARD DEPLOYMENT CONTROL SYSTEM] .) (See CLOCK SPRING REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM] .)

Remove the column cover. (See COLUMN COVER REMOVAL/INSTALLATION .)
Connect the plus (+) end of a tester to steering angle sensor terminal A and the minus (-) end of the tester to terminal B (ground).

Fig 1: Connect Plus End Of Steering Angle Sensor Terminal Tester
Courtesy of MAZDA MOTORS CORP.
Switch the ignition ON (engine off or on).
Turn the steering wheel to the right and left.
Verify that the voltage between steering angle sensor terminals A and B (ground) is as indicated in the table.

Fig 2: Steering Angle Sensor Turning Angle Output Voltage Waveform - Terminal A And B
Courtesy of MAZDA MOTORS CORP.
- If the voltage can be verified as indicated in the table, go to the next step.
- If not as indicated in the table, replace the clock spring. (See CLOCK SPRING REMOVAL/INSTALLATION [STANDARD DEPLOYMENT CONTROL SYSTEM] .) (See CLOCK SPRING REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM] .)
Switch the ignition off.
Connect the plus (+) end of a tester to steering angle sensor terminal C and the minus (-) end of the tester to terminal B (ground).
Switch the ignition ON (engine off or on).
Turn the steering wheel to the right and left.
Verify that the voltage between steering angle sensor terminals C and B (ground) is as indicated in the table.

Fig 3: Steering Angle Sensor Turning Angle Output Voltage Waveform - Terminal C And B
Courtesy of MAZDA MOTORS CORP.
- If not as indicated in the table, replace the clock spring. (See CLOCK SPRING REMOVAL/INSTALLATION [STANDARD DEPLOYMENT CONTROL SYSTEM] .) (See CLOCK SPRING REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM] .)