Ignition Timing: Testing and Inspection

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 OBDII SCAN TOOL
a. Connect the hand-held tester or OBDII scan tool to the DLC3.
b. Please refer to the hand-held tester or OBDII scan tool operator's manual for further details.





6. CONNECT TIMING LIGHT TO ENGINE
Connect the tester probe of a timing light to the yellow lead wire of the ignition coil connector for No.1 cylinder.
7. CHECK IDLE SPEED
a. Race the engine speed at 2,500 rpm for approx. 90 seconds.
b. Check the idle speed.
Idle speed: 750 ± 50 rpm

8. INSPECT IGNITION TIMING





a. Using SST, connect terminals TC and E1 of the DLC1.
SST 09843-18020





b. Using a timing light, check the ignition timing.
Ignition timing: 8 - 12° BTDC @ idle (Transmission in neutral position)
c. Remove the SST from the DLC1.
SST 09843-18020
9. DISCONNECT TIMING LIGHT FROM ENGINE
10. DISCONNECT LEXUS HAND-HELD TESTER OR OBDII SCAN TOOL
11. REINSTALL V-BANK COVER
12. REINSTALL AIR CLEANER INLET
13. REINSTALL BATTERY CLAMP COVER