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Ignition Timing: MR2

  1. Start engine and warm engine to normal operating temperature. Shut engine off. Remove cover from junction block No. 1 and connect timing light lead to Black/Red wire. See Fig 1. Junction block No. 1 is located at driver's side rear corner of engine compartment, just in front of strut tower.
  2. Apply parking brake. Place transaxle in Neutral. Note location of data link connector No. 3 at driver's side of instrument panel. See Figure. Install Jumper Wire (SST 09843-18020 or SST 09843-18040) between terminals No. 4 (CG) and 13 (TC) on data link connector No. 3. See Figure. Start engine. Engine speed should increase to 1000-1500 RPM for 5 seconds and return to idle.
  3. Check ignition timing with engine idling. Timing marks are located on timing chain cover, near crankshaft pulley. Ensure base timing is within specification at idle with transaxle in Neutral, and with A/C, electric cooling fan and all accessories off. See IGNITION TIMING SPECIFICATIONS  table.
  4. Remove jumper wire from data link connector No. 3. Ensure ECM controlled timing is within specification. See IGNITION TIMING SPECIFICATIONS  table. Shut engine off. Remove timing light. Reinstall cover on junction block No. 1.
    Fig 1: Connecting Timing Light (MR2)
    G00016682Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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