Ignition Timing: Testing and Inspection

Ignition Timing Check
1. Before inspection, set the vehicles in the following condition.
- Engine coolant temperature: 80 - 95°C (176 - 203° F)
- Lights and all accessories: OFF
- Transmission: P range
2. Connect the scan tool to the date link connector.
3. Set up a timing light.
4. Start the engine and run at idle.
5. Check that the idle speed is at approx. 700 r/min.
6. Select the "item No.17" of the actuator test on the scan tool.
7. Check that basic ignition timing is within the standard value.
Standard value: 5° BTDC ± 3°
8. If the basic ignition timing is outside the standard value, check the MFI components by referring to Powertrain Management; Testing and Inspection.
9. Press the clear key of the scan tool (select force-activating cancel mode), and cancel the actuator test.

NOTE: If it is not canceled, force-activation continues for 27 minutes. Do not drive the vehicle in this condition, or the engine could be damaged.

10. Check that the actual ignition timing is at the standard value.
Standard value: Approximately 15° BTDC

NOTE:
1. Ignition timing is variable within about ±7°, even under normal operating.
2. And it is automatically further advanced by about 5° from 15° BTDC at the higher altitudes.