Ignition Timing: Testing and Inspection
INSPECT IGNITION TIMINGa) Warm up engine.
b) When using intelligent tester.
1) Connect the intelligent tester to the DLC 3.
HINT: Please refer to the intelligent tester operator's manual for further details.
Ignition timing: 8 to 12° BTDC
c) When not using intelligent tester.
1) Using SST, connect terminals 13 (TC) and 4 (CG) of DLC 3.
SST 09843-18040
NOTICE:
^ Be careful 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 V-bank cover.
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.
4) Inspect ignition timing at idle.
Ignition timing: 8 to 12° BTDC
NOTICE: When checking the ignition timing, the transmission is in neutral position.
HINT: After engine rpm is kept at 1,000 to 1,300 rpm for 5 seconds, check that it returns idle speed.
5) Disconnect terminals 13 (TC) and 4 (CG) of the DLC3.
6) Inspect ignition timing at idle.
Ignition timing: 7 to 24° BTDC
7) Confirm that ignition timing moves to advanced angle when the engine rpm is increased.
8) Remove the timing light.