Ignition Timing: Testing and Inspection

INSPECT IGNITION TIMING
(a) Warm up the engine.





(b) When using the intelligent tester:
Check the ignition timing.
(1) Connect the intelligent tester to the DLC3.
(2) Enter DATA LIST MODE on the intelligent tester.
Ignition timing: 8 to 12° BTDC at idle

HINT: Refer to the intelligent tester operator's manual for help when selecting the DATA LIST.





(c) When not using the intelligent tester:
Check the ignition timing.
(1) Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3.
SST 09843-18040

NOTICE:
- Confirm the terminal numbers before connecting them. Connection with a wrong terminal can damage the engine.
- Turn off all electrical systems before connecting the terminals.
- Perform this inspection after the cooling fan motor is turned off.





(2) Remove the No. 1 engine cover.
(3) Pull out the wire harness as shown in the illustration. Connect the clip of the timing light to the wire harness.

NOTICE:
- Use a timing light which can detect the first signal.
- After checking, be sure to tape the wire harness.

(4) Check the ignition timing at idle.
Ignition timing: 8 to 12° BTDC at idle

NOTICE: When checking the ignition timing, the transmission should be in neutral.

HINT: After engine rpm is kept at 1,000 to 1,300 rpm for 5 seconds, check that it returns to idle speed.

(5) Disconnect terminals 13 (TC) and 4 (CG) of the DLC3.
(6) Check the ignition timing at idle.
Ignition timing: 5 to 15° BTDC at idle
(7) Confirm that the ignition timing moves to the advanced angle side when the engine rpm is increased.
(8) Remove the timing light.