Ignition Timing: Testing and Inspection

1. Before inspection, set the vehicle in the following condition:
- Engine coolant temperature at 80 - 95° C (176 - 203° F).
- Lights, electric cooling fan and all accessories "OFF".
- The transaxle should be in Neutral (P range on vehicles with A/T).
2. Turn the ignition switch "OFF" and connect the scan tool to the data link connector.
3. Set up a timing light.
4. Start the engine and run at idle. Select No. 22 of the SCAN TOOL DATA LIST.
5. Check that the idle speed is 650 - 850 RPM.
6. Select No. 17 of the SCAN TOOL ACTUATOR TEST.
7. Check that basic ignition timing is within 2 - 8° BTDC.
8. If the basic ignition timing is outside the standard value, check the MFI components.
9. Press the clear key of the scan tool (select force-activating cancel mode), and cancel the ACTUATOR TEST.

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

10. Check the actual ignition timing is at the standard value. The standard value is approximately 10° BTDC.

NOTE: Ignition timing is variable within about 7° of the standard value, even under normal operating. Also, it is automatically further advanced by about 5° from 10° BTDC at higher altitudes.