Ignition Timing: Testing and Inspection

2AZ-FE ENGINE MECHANICAL: ENGINE:

INSPECTION
1. INSPECT IGNITION TIMING
(a) Warm up the engine.
(b) When using Techstream:
Check the ignition timing.
(1) Connect Techstream to the DLC3.
(2) Turn the ignition switch to ON.
(3) Turn the tester ON.
(4) Select the following menu items: Power Train / Engine and ECT / Data List / IGN Advance.
(5) Start the engine.
(6) According to the display on tester, read the Data List.
Ignition timing:
8 to 12° BTDC at idle
(7) Check that the ignition timing advances immediately when the engine speed is increased.
(c) When not using Techstream:





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 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) Check the ignition timing at idle.
Ignition timing:
8 to 12° BTDC at idle

NOTE: When checking the ignition timing, the transmission should be in the neutral position.

HINT: After engine rpm is kept at 1000 to 1300 rpm for 5 seconds, check that it returns to idle speed.

(5) Disconnect terminals 13 (TC) and 4 (CG) of the DLC3.
(6) Check the ignition timing at idle.
Ignition timing:
5 to 15° BTDC at idle
(7) Confirm that ignition timing moves to the advanced angle side when the engine rpm is increased.
(8) Remove the timing light.