Ignition Timing: Inspection

Allow the engine to warm up to the normal operating temperature.

1. Connect the LEXUS hand-held tester or OBD II scan tool to the DLC3.
2. Please refer to the hand-held tester or OBD II scan tool operator's manual for further details.

Fig 1: Connecting LEXUS Hand-Held Tester To DLC3

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Connect the tester probe of a timing light to the wire of the ignition coil connector for No. 1 cylinder.

Fig 2: Connecting Tester Probe Of Timing Light To Wire Of Ignition Coil Connector

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1. Race the engine speed at 2,500 rpm for approx. 90 seconds.
2. Check the idle speed.
   1. Idle speed: 
   2. 700 +/- 50 rpm 

1. Using SST, connect TC and E1 of the DLC1.
   1. SST 09843-18020
   Fig 3: Connecting TC & E1 Of DLC1 Using SST

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2. Using a timing light, check the ignition timing.
   1. Ignition timing: 5 - 15° BTDC @ idle (Transmission in neutral position) 
   Fig 4: Checking Ignition Timing Using Timing Light

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3. Remove SST from the DLC1.
   1. SST 09843-18020