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 ° Δ 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 Connector
  Courtesy of MAZDA MOTORS CORP.