Ignition Timing: Testing and Inspection
INSPECT IGNITION TIMINGa. 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 @ idle
HINT: Please refer to the intelligent tester operator's manual for further details.
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 black lead wire harness as shown in the illustration.
(4) Connect the tester terminal of the timing light to the engine.
NOTICE: Use a timing light which detects the first signal.
(5) Check the ignition timing at idle.
Ignition timing: 8 to 12° BTDC @ 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) Remove the SST from the DLC3.
(7) Check the ignition timing at idle.
Ignition timing: 7 to 24° BTDC @ idle
(8) Confirm that the ignition timing moves to the advanced angle side when the engine rpm is increased.
(9) Remove the timing light.