Combined Sensor Inspection

Turn the ignition switch off.
Remove the combined sensor installation nut.
Connect the M-MDS to the DLC-2.
After the vehicle is identified, select the following items from the initialization screen of the M-MDS.
- When using the IDS (laptop PC)
  1. Select "DataLogger".
  2. Select "Modules".
  3. Select "ABS".
- When using the PDS (Pocket PC)
  1. Select "Module Tests".
  2. Select "ABS".
  3. Select "DataLogger".
    
    Fig 1: Identifying DLC2 Connector Terminal
    Courtesy of MAZDA MOTORS CORP.
Select the following PIDs, then inspect the lateral acceleration speed, longitudinal acceleration speed, roll rate and yaw rate.
- LAT_ACCL: (lateral acceleration speed)
- ACCLMTR: (longitudinal acceleration speed)
- YAW_RATE: (yaw rate)
- ROLL_RATE (roll rate)
1. Lateral acceleration speed inspection
  1. Verify the LAT_ACCL change when the combined sensor is tilted to the left and right.
    - If there is any malfunction, replace the combined sensor.
      Standard
      
      When the sensor is tilted to the right (A):
      
      LAT ACCL changes negatively.
      
      When the sensor is tilted to the left (B):
      
      LAT_ACCL changes positively.
      
      Fig 2: Tilting Combined Sensor Left And Right
      Courtesy of MAZDA MOTORS CORP.
2. Longitudinal acceleration speed inspection
  1. Verify the ACCLMTR change when the combined sensor is moved forward and backward.
    - If there is any malfunction, replace the combined sensor.
      Standard
      
      When the sensor is tilted to forward (A):
      
      ACCLMTR changes negatively.
      
      When the sensor is tilted to backward (B):
      
      ACCLMTR changes positively.
      
      Fig 3: Tilting Combined Sensor Forward And Backward
      Courtesy of MAZDA MOTORS CORP.
3. Yaw rate inspection
  1. Verify the YAW_RATE change when the combined sensor is rotated to the left and right.
    - If there is any malfunction, replace the combined sensor.
      Standard
      
      When the sensor is rotated to the right (A):
      
      YAW_RATE changes positively.
      
      When the sensor is rotated to the left (B):
      
      YAW_RATE changes negatively.
      
      Fig 4: Rotating Combined Sensor Left And Right
      Courtesy of MAZDA MOTORS CORP.
4. Roll rate inspection
  1. Verify the ROLL_RATE change when the combined sensor is tilted to the left and right.
    - If there is any malfunction, replace the combined sensor
      Standard
      
      When the sensor is tilted to the right (A):
      
      ROLL_RATE changes positively
      
      When the sensor is tilted to the left (B):
      
      ROLL RATE changes negatively
      
      Fig 5: Tilting Combined Sensor Left And Right
      Courtesy of MAZDA MOTORS CORP.