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.

Start the engine and run it at idle.
Warm up the engine to normal operating temperature.
Connect the 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.

Fig 1: Locating DLC-2
Courtesy of MAZDA MOTORS CORP.

Specification Approx. BTDC 10°
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 )
  - CMP sensors (left and right bank) and related harness (See CAMSHAFT POSITION (CMP) SENSOR INSPECTION .