Ignition Timing: Testing and Inspection

INSPECT IGNITION TIMING

NOTICE:
^ Turn all the electrical systems and the A/C OFF.
^ Inspect the ignition timing with the cooling fan OFF.
^ When checking the ignition timing, shift the transmission to the neutral position.

(a) Warm up and stop the engine.





(b) When using the intelligent tester:
(1) Connect the intelligent tester to the DLC3.
(2) Allow the engine to idle.
(3) Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DATA LIST.
(4) Read IGN ADVANCE to check the ignition timing.
Standard ignition timing: 5 to 15° BTDC at idle
(5) Check that the ignition timing advances immediately when the engine speed is increased.
(6) Turn the ignition switch OFF.
(7) Disconnect the intelligent tester from the DLC3.
(c) When not using the intelligent tester:
(1) Remove the No. 1 engine cover.
(2) Open the IG cover located in the right of the No. 4 ignition coil.





(3) Pull out the wire harness as shown in the illustration.
(4) Connect the timing light to the wire harness.

NOTICE: Use a timing light that detects the first signal.





(5) Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3.
SST 09843-18040
(6) Allow the engine to idle and check the ignition timing.
Standard ignition timing: 8 to 12° BTDC at idle

HINT: Run the engine speed at 1,000 to 1,300 rpm for 5 seconds, then check that the engine speed returns to the idling speed.

(7) Remove the SST from the DLC3.
(8) Allow the engine to idle and check the ignition timing.
Standard ignition timing: 5 to 15° BTBC
(9) Check that the ignition timing advances immediately when the engine speed is increased.
(10) Turn the ignition switch OFF.
(11) Remove the timing light.
(12) Close the IG cover.
(13) Install the No. 1 engine cover.