Toyota Tundra 2001-06

Timing Check

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4.0L Engine




NOTE
The ignition timing is not adjustable but can be checked. Be sure that all electrical systems are OFF. Be sure that the cooling fan motor is OFF.

With Intelegent Tester
  1. Warm up the engine.
  2.  
  3. Connect the tool to the DLC3.
  4.  
  5. Select the following menu items: DIAGNOSIS/ENHANCED OBDII/DATA LIST/PRIMARY/IGN ADVANCE.
  6.  
  7. Inspect the ignition timing during idling.
  8.  
  9. Check that the ignition timing advances immediately when the engine speed is increased.
  10.  

Without Intelegent Tester
  1. Using too SST09843-18040, connect terminals 13 (TC) and 4 (CG) of the DLC3.
    NOTE
    Be careful not to connect the wrong terminals, as engine damage may occur.

  2.  
  3. Remove the air cleaner. Pull out the wire harness.

    Click image to see an enlarged view

    Fig. Wiring harness location-4.0L engine

  4.  
  5. Connect the test probe of the timing light to the wire of the ignition coil connector for the No. 1 cylinder.
    NOTE
    Be sure to use a timing light that detects the first signal. After checking be sure to wrap the wire harness with tape.

  6.  
  7. Check the ignition timing during idling. Check that the ignition timing is within specification. Be sure all electrical systems are OFF.
  8.  

4.7L Engine




NOTE
The ignition timing is not adjustable but can be checked. Be sure that all electrical systems are OFF. Be sure that the cooling fan motor is OFF.

With Intelegent Tester
  1. Warm up the engine.
  2.  
  3. Connect the tool to the DLC3.
  4.  
  5. Refer to the tester operating manual for additional details.
  6.  
  7. Inspect the ignition timing during idling.
  8.  
  9. Check that the ignition timing advances immediately when the engine speed is increased.
  10.  

Without Intelegent Tester
  1. Remove the throttle body cover.
  2.  
  3. Using too SST09843-18040, connect terminals TC and CG of the DLC3.
    NOTE
    Be careful not to connect the wrong terminals, as engine damage may occur.



    Click image to see an enlarged view

    Fig. Wiring harness location-2005-2006 4.7L engine

  4.  
  5. Connect the test probe of the timing light to the wire of the ignition coil connector for the No. 1 cylinder.
  6.  
  7. Check the ignition timing.
  8.  

 
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