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WARM UP ENGINE
Allow the engine to warm up to normal operating temperature.
CHECK IDLE SPEED (See page INSPECTION )
CONNECT TIMING LIGHT
Connect the tester probe of a timing light to the black-white service wire of the engine wire as shown in the illustration.

Fig 1: Connecting Timing Light Tester Probe To Black-White Service Wire
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT IGNITION TIMING
1. Using SST, connect terminals to TC and CG of the DLC3.
  
  Fig 2: Connecting Terminals To TC & CG Of DLC3 Using SST
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  SST 09843-18040
  
  NOTE: After engine RPM is kept at 900 - 1,500 RPM for 5 seconds, check that it returns to idle speed.
2. Using a timing light, check the ignition timing.
  
  Fig 3: Checking Ignition Timing Using A Timing Light
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Ignition timing: 8 - 12° BTDC @ idle
3. Remove the SST from the DLC3.
FURTHER CHECK IGNITION TIMING
Ignition timing: 5 - 15° BTDC @ idle

HINT:

The timing mark moves in a range between 5° and 15°.
DISCONNECT TIMING LIGHT

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Ignition Timing: Inspection