Ignition Timing: Adjustments

1. Before inspection and adjustment set vehicle in the following condition.
- Engine coolant temperature: 80-95°C (176-203°F)
- Lights, electric cooling fan and all accessories: OFF
- Transaxle: Neutral (P range on vehicles with A/T)
2. Insert a paper clip from the harness side into the 1 pin connector (blue) as shown in the illustration above.
3. Connect a primary-Voltage-detection type of tachometer to the paper clip.

NOTE: Do not use the scan tool. If tested with the scan tool connected to the data link connector, the ignition timing will not be the basic timing but be ordinary timing.

4. Set up a timing light.
5. Start the engine and run at idle.
6. Check that engine idle speed is within the standard value.

Standard value: 800 ± 100 rpm

NOTE: For rpm, one-half of the actual engine rpm is indicated, so the actual engine rpm is two times the indicated valve shown by the tachometer.

7. Turn the ignition switch to OFF.
8. Remove the waterproof connector from the ignition timing adjustment connector (brown).




9. Connect the jumper wire with the clip to the ignition timing adjustment terminal, and ground this to the body as illustrated.

NOTE: Grounding this terminal sets the engine to the basic ignition timing.

10. Start the engine and run it at idle.




11. Check that basic ignition timing is within the standard value.

Basic ignition timing: 5° ± 3° BTDC

12. If the basic ignition timing is outside the standard value, inspect the MFI components.
13. Stop the engine, remove the jumper wire from the ignition timing adjustment connector (brown), and return the connector to its original condition.
14. start the engine and check that ignition timing at the standard value.

Actual ignition timing: Approx. 8° BTDC

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