Ignition Timing: Adjustments

Ignition Tach Connector Location:

Pre-Adjustment Conditions
- Engine coolant temperature: 80-95°C (176-203°F)
- Lights and all accessories: OFF
- Transmission: Neutral (P for A/T)




Insert a paper clip into the 1-pin connector between the primary side of the ignition coil and the noise filter. The connector should not be disconnected.

CAUTION: Insert the paper clip along the terminal from the opposite side to the locking pawl of the female connector, as shown in the illustration.




- Connect a primary voltage detection-type tachometer to the paper clip

NOTE: Do not use the scan tool. If the scan tool is connected to the data link connector, the ignition timing will be unchanged instead of reverting to the standard ignition timing.

- Connect a timing light
- Start the engine and run it at idle
- Check that the idle speed is at the standard value

Standard value: 7OO ±1OO rpm

- Turn the ignition switch to OFF




- Disconnect the waterproof female connector from the ignition timing adjustment connector (brown)
- Use a jumper wire to ground the ignition timing adjustment terminal

NOTE: Grounding the ignition timing adjustment terminal will change the ignition timing to standard.

- Start the engine and run it at idle
- Check the standard ignition timing

Standard value: 5° BTDC ±2°




- If the timing is outside the standard value, adjust by turning the distributor
- After adjusting the ignition timing, tighten the mounting nut, being careful not to move the distributor
- Stop the engine, remove the jumper lead from the ignition timing adjustment connector (brown), and return the connector to its original condition
- Start the engine and check that the ignition timing is at the standard value

Standard value: Approx. 15° BTDC

NOTE: Ignition timing is variable within about 7°, even under normal operating conditions. It is automatically further advanced by about 5° from 15° BTDC at higher altitudes.