Ignition Timing: Testing and Inspection
IGNITION TIMING INSPECTION1. 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.