Ignition Timing: Testing and Inspection
INSPECT IGNITION TIMINGa. Warm up engine.
b. When using hand-held tester.
1. Connect the hand-held tester to the DLC3.
Ignition timing: 8 - 12° BTDC
HINT: Please refer to the hand-held tester operator's manual for further details.
c. When not using hand-held tester.
1. Using SST, connect terminals 13 (TC) and 4 (CG) of DLC3.
SST 09843-18040
NOTICE:
- Be sure not to connect incorrectly. It causes breakage of the engine.
- Turn OFF all electrical systems.
- Operate the inspection when 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. Inspect ignition timing at idle.
Ignition timing: 8 - 12° BTDC
NOTICE: When checking the ignition timing, the transmission is at neutral position.
HINT: After engine rpm is kept at 1,000 - 1,300 r/min. for 5 seconds, check that it returns idle speed.
5. Disconnect terminals 13 (TC) and 4 (CG) of DLC3.
6. Inspect ignition timing at idle.
Ignition timing: 5 - 15° BTDC
7. Confirm that ignition timing moves to advanced angle side when the engine rpm is increased.
8. Remove the timing light.