Ignition Timing: Testing and Inspection
INSPECTION1. REMOVE BATTERY CLAMP COVER
2. REMOVE AIR CLEANER INLET
3. REMOVE V-BANK COVER
Remove the 2 cap nuts, 2 bolts 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