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 with 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 V-bank cover.





(3) Pull out the red lead wire harness.
(4) Connect the tester terminal of the timing light to the red lead wire as shown in the illustration.

NOTICE: Use a timing light which can detect the first signal.

(5) 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: Run the engine at 1000 to 1300 rpm for 5 seconds, and then check that the engine rpm returns to idle speed.

(6) Disconnect terminals 13 (TC) and 4 (CG) of the DLC3.
(7) Check the ignition timing at idle.
Ignition timing: 7 to 24° BTDC at idle
(8) Confirm that the ignition timing moves to the advanced angle side when the engine rpm is increased.
(9) Remove the timing light.