Ignition Timing: Testing and Inspection

IGNITION TIMING INSPECTION
1. REMOVE BATTERY CLAMP COVER.
2. REMOVE AIR CLEANER INLET.
3. REMOVE V-BANK COVER.



- Remove the 2 cap nuts, bolt and V-bank cover.

4. WARM UP ENGINE.
- Allow the engine to warm up to normal operating temperature.

5. CONNECT LEXUS HAND- HELD TESTER OR OBD II SCAN TOOL.



(a) Connect the hand-held tester or OBD II scan tool to the DLC3.
(b) Please refer to the hand-held tester or OBD II scan tool operator's manual for further details.

6. CONNECT TIMING LIGHT TO ENGINE.



- Connect the tester probe of a timing light to the high-tension cord for cylinder No.6.

7. CHECK IDLE SPEED.
(a) Race the engine speed at 2,500 rpm for approx. 90 seconds.
(b) Check the idle speed.

Idle speed: 650 ± 50 rpm


8. INSPECT IGNITION TIMING.



(a) Using a jumper wire (or SST 09843-18020), connect terminals TE1 and E1 of the DLC1.



(b) Using a timing light, check the ignition timing.

Ignition timing at idle: 8° - 12° BTDC
(Transmission in neutral position)

(c) Remove the jumper from the DLC1.

9. DISCONNECT TIMING LIGHT FROM ENGINE.
10. DISCONNECT LEXUS HAND-HELD TESTER OR OBD II SCAN TOOL.
11. REINSTALL V-BANK COVER.
12. REINSTALL AIR CLEANER INLET.
13. REINSTALL BATTERY CLAMP COVER.