Ignition Timing: Testing and Inspection

1. WARM UP ENGINE.
- Allow the engine to warm up to normal operating temperature.
2. CONNECT LEXUS HAND-HELD TESTER OR OBD II SCAN TOOL.
- Remove the fuse cover on the instrument panel.





- Connect the LEXUS hand-held tester or OBD II scan tool to the DCL3.

Please refer to the LEXUS hand-held tester or OBD II scan tool operator's manual for further details.

3. CONNECT TIMING LIGHT TO ENGINE.
4. CHECK IDLE SPEED.
- Race the engine speed at 2,500 rpm for approx. 90 seconds.
- Check the idle speed.

Idle speed: 650 ± 50 rpm





5. INSPECT AND ADJUST IGNITION TIMING.
- Using SST, connect terminals TE1 and E1 of the DLC1.
SST 09843-18020





- Using a timing light. check the ignition timing.

Ignition timing: 3° BTDC @ idle
(Transmission in neutral position and A/C OFF)

- Loosen the bolt, and adjust by turning the distributor.
- Tighten the bolt, and recheck the ignition timing.

Torque: 18 N.m (18O kgf.cm, 13 ft.lbf)

- Remove the SST from the DLC1.
SST 09843-18020
6. FURTHER CHECK IGNITION TIMING.

Ignition timing: 2 - 13° BTDC @ idle
(Transmission in neutral position and A/C OFF)

HINT: The timing mark moves in a range between 2° and 13°.

7. DISCONNECT TIMING LIGHT FROM ENGINE.
8. DISCONNECT LEXUS HAND-HELD TESTER OR OBD II SCAN TOOL.