Steering Angle Sensor Inspection

Remove the column cover.
Measure the voltage between steering angle sensor terminal B and ground.
- If there is any malfunction, inspect the wiring harness between steering angle sensor terminal B and battery, then repair or replace if necessary.
  Standard voltage: B+
Turn the ignition switch to the ON position, then measure the voltage between steering angle sensor terminal A and ground.
- If there is any malfunction, inspect the wiring harness between steering angle sensor terminal A and ignition switch, then repair or replace if necessary.
Standard voltage: B+

Fig 1: Identifying Steering Angle Sensor Connector Terminals
Courtesy of MAZDA MOTORS CORP.
Measure the voltage between steering angle sensor terminal H and the ground.
- If there is any malfunction, inspect the wiring harness between steering angle sensor terminal H and ground point, then repair or replace if necessary.
Standard voltage: 0V
Turn the ignition switch off.
Connect the M-MDS or equivalent to the DLC-2.

Fig 2: Identifying DLC-2 Connector
Courtesy of MAZDA MOTORS CORP.
Select the SWA_POS PID.
Verify the SWA_POS changes when the steering wheel is turned to the left and right.
- If there is any malfunction, replace the steering angle sensor.
  Standard
  
  When the steering wheel is turned to the right:
  
  SWA_POS changes positively.
  
  When the steering wheel is turned to the left:
  
  SWA_POS changes negatively.