Ignition Timing: Testing and Inspection
INSPECTION1. REMOVE BATTERY CLAMP COVER
2. REMOVE INTAKE AIR CONNECTOR
3. REMOVE 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 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: 700 ± 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: 5 - 15° 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 OBD II SCAN TOOL FROM DLC3.
11. REINSTALL V-BANK COVER
12. REINSTALL INTAKE AIR CONNECTOR
13. REINSTALL BATTERY CLAMP COVER