Ignition Timing: Testing and Inspection

Ignition Timing Inspection AJ

Engine Tune-up Preparation
1. Turn off the electrical loads.
2. Warm up the engine as follows.
1) Start the engine.
2) Maintain the engine speed 2,500 - 3,000 rpm until the cooling fans start to operate.
3) Release the accelerator pedal.
4) Wait until the cooling fans stop.





3. Connect the SST (WDS or equivalent) to the DLC-2.


Note:
- Ignition timing is not adjustable.
- Ignition timing verification requires WDS or equivalent.

1. Verify that the ignition timing (WDS: SPARKADV PID) is within the specification using WDS or equivalent.
Ignition timing Approximately BTDC 10°
2. Verify that ignition timing advances when the engine speed increases gradually.

- If it is not advanced, inspect the following:

- CKP sensor and related harness
- MAF sensor and related harness
- CMP sensors (left and right bank) and related harness