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Ignition Timing: Tercel

  1. Start engine and warm engine to normal operating temperature. Shut engine off. Connect timing light to spark plug wire on cylinder No. 1. Cylinder No. 1 is front cylinder at timing belt end of engine.
  2. Remove cover and connect scan tool to data link connector No. 3. See Figure-30. Scan tool is used to read engine RPM.
  3. Install Jumper Wire (SST 09843-18020) between terminals TE1 and E1 on data link connector No. 1. See Figure-37. Data link connector No. 1 is located in engine compartment, near driver's side strut tower. Apply parking brake. Place transaxle in Neutral. Start engine.
    NOTE: Timing marks are located on timing belt cover, near crankshaft pulley.
  4. Ensure base timing is within specification at idle with transaxle in Neutral, and with electric cooling fan, A/C and all accessories off. See IGNITION TIMING  table.
  5. Remove jumper wire from data link connector No. 1. Ensure ECM controlled timing is within specification. See IGNITION TIMING  table. Shut engine off. Remove jumper wire, timing light and scan tool.
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