Air Gap Inspection

Verify that the CKP sensor is securely installed.
Using a thickness gauge, measure the air gap between the plate projections at the back of crankshaft pulley and the CKP sensor.
- If not within the specification, inspect the plate projections for cracks or bending.
  - If there is any malfunction, replace the plate.
  - If the monitor item condition/specification (reference) is not within the specification, even though there is no malfunction, carry out the "Circuit Open/Short Inspection".
    
    Fig 1: Identifying Air Gap Between Plate Projections At Back Of Crankshaft Pulley And CKP Sensor
    Courtesy of MAZDA MOTORS CORP.