Ignition Timing: Testing and Inspection
INSPECT IGNITION TIMINGa. Warm up the engine.
b. When using the hand-held tester:
Check the ignition timing.
1. Connect the hand-held tester to the DLC3.
2. Enter DATA LIST MODE with the hand-held tester.
Ignition timing: 8 to 12° BTDC at idle
HINT: Refer to the hand-held tester operator's manual for help on selecting the DATA LIST.
c. When not using the hand-held 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 detects 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 the neutral position.
HINT: Run the engine at 1,000 to 1,300 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: 5 to 15° 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.