Steering Angle Sensor Inspection

Remove the column cover.
Turn the ignition switch to the ON position and 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. Repair or replace if necessary, (without DSC)
- If there is any malfunction, inspect the wiring harness between steering angle sensor terminal A and DSC HU/CM terminal AB. Repair or replace if necessary, (with DSC)
Standard voltage B+

Fig 1: Identifying Steering Angle Sensor Connector Terminals
Courtesy of MAZDA MOTORS CORP.
Measure the voltage between steering angle sensor terminal D and ground.
- If there is any malfunction, inspect the wiring harness between steering angle sensor terminal D and EHPAS control module terminal 3A. Repair or replace if necessary, (without DSC)
- If there is any malfunction, inspect the wiring harness between steering angle sensor terminal D and DSC HU/CM terminal AH. Repair or replace if necessary, (with DSC)
Standard voltage 0V
Turn the ignition switch off.
Connect the M-MDS to the DLC-2.
Select the STEER_RATE PID. (see ELECTRO HYDRAULIC POWER ASSIST STEERING (EHPAS) ON-BOARD DIAGNOSIS [ELECTRO HYDRAULIC POWER ASSIST STEERING (EHPAS)] .)
Verify the STEER_RATE changes when the steering wheel is turned to the left and right.
- If there is any malfunction, replace the steering angle sensor. (See CLOCK SPRING REMOVAL/INSTALLATION .)
Standard

When the steering wheel is turned to the left:

STEER_RATE changes positively.

When the steering wheel is turned to the right:

STEER_RATE changes negatively.

Fig 2: Identifying DLC-2 Connector
Courtesy of MAZDA MOTORS CORP.