Ignition Timing: Testing and Inspection

3MZ-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 V-bank cover.





(3) Pull out the 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 can detect the first signal.

(5) 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: Run the engine at 1000 to 1300 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:
7 to 24° BTDC at idle
(8) Confirm that ignition timing moves to the advanced angle side when the engine rpm is increased.
(9) Remove the timing light.