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Ignition Timing: V6: Sienna

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2002 Toyota Tundra, 2002 Toyota Tacoma, 2002 Toyota Sienna, 2002 Toyota Sequoia, and 2002 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove intake manifold cover. See Figure. Start engine and warm engine to normal operating temperature. Shut engine off.
  2. Connect timing light lead to lead wire located near ignition coil on top of front valve cover. See Figure. Connect Toyota hand-held tester or scan tool to data link connector No. 3 at driver's side of instrument panel. See Figure. Hand-held tester or scan tool is used to read engine RPM.
  3. Apply parking brake. Place transaxle in Neutral. Start engine and maintain engine at 2500 RPM for 90 seconds and then allow engine to idle. Ensure idle speed is 650-750 RPM.
  4. Note location of data link connector No. 1 on engine mount bracket at passenger's side front of engine. See Figure. Install Jumper Wire (SST 09843-18020 or SST 09843-18040) between terminals E1 and TC on data link connector No. 1. See Figure.
  5. Check ignition timing with engine idling. Timing marks are located on timing belt cover, near crankshaft pulley. Ensure base timing is within specification at idle with transaxle in Neutral, and with A/C and all accessories off. See V6 IGNITION TIMING  table.
  6. Remove jumper wire from data link connector No. 1. Ensure ECM controlled timing is within specification. See IGNITION TIMING  table. Shut engine off. Remove timing light and hand-held tester or scan tool. Reinstall intake manifold cover.
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