Ignition Timing: Testing and Inspection
INSPECTION1. Warm up engine.
Allow the engine to warm up to normal operating temperature.
2. Connect Toyota hand-held tester or OBD II scan tool.
a. Remove the fuse cover on the instrument panel.
b. Connect the TOYOTA hand-held tester or OBD II scan tool to the DLC3.
c. Please refer to the TOYOTA hand-held tester or OBD II scan tool operator's manual for further details.
3. Connect timing light to engine.
Connect the tester probe of a timing light to the No.1 high-tension cord for No.4 cylinder.
4. Check idle speed.
a. Race the engine speed at 2,500 rpm for approximately 90 seconds.
b. Check the idle speed.
Idle speed: 700 ± 50 rpm
5. Inspect ignition timing.
a. Using Special Service Tool (SST) 09843 - 18020 or equivalent, connect terminals TE1 and E1 of the DLC1.
b. Using a timing light, check the ignition timing.
Ignition timing: 8 - 12° Before Top Dead Center (BTDC) @ idle
(Transmission in neutral position)
c. Remove the (SST) from the DLC1.
6. Further check ignition timing.
Ignition timing: 7 - 24° BTDC @ idle
(Transmission in neutral position)
HINT: The timing mark moves in a range between 7° and 24°.
7. Disconnect timing light from engine.
8. Disconnect Toyota hand-held tester or OBD II scan tool.