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.
4. Inspect ignition timing.
a. Using Special Service Tool (SST) 09843 - 18020 or equivalent, connect terminals TE1 and E1 of the DLC1.
HINT: After engine rpm is kept at 1,000 - 1,300 rpm for 5 seconds, check that it returns to idle speed.
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.
5. Further check ignition timing.
Ignition timing: 0 - 10° BTDC @ idle (Transmission in neutral position)
HINT: The timing mark moves in a range between 0° and 10°.
6. Disconnect timing light from engine.
7. Disconnect Toyota hand-held tester or OBD II scan tool.