Ignition Timing Control Inspection

Start the engine and run it at idle.
Warm up the engine to normal operating temperature.
Connect the SSTs (WDS or equivalent) to the DLC-2.
Select the PID/DATA MONITOR AND RECORD function on the WDS or equivalent display.
Select the SPARKADV PID.
Verify that SPARKADV PID is within the specification.
Specification: BTDC 4°-16° (10° +/- 6°)
Increase the engine speed and verify that the SPARKADV PID value is advanced.
- If it is not advanced, inspect the following.
  - CKP sensor and related harness (See CRANKSHAFT POSITION (CKP) SENSOR INSPECTION .)
  - MAF sensor and related harness (See MASS AIRFLOW (MAF)/INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION .)
    
    Fig 1: Locating DLC-2
    Courtesy of MAZDA MOTORS CORP.