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

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) Remove the SST from the DLC3.
SST 09843-18040
(6) Check the ignition timing idle.
Ignition timing: 5 to 15° BTDC at idle
(7) Confirm that ignition timing moves to the advanced angle side when the engine rpm is increased.
(8) Remove the timing light.