Ignition Timing: Inspection

WARNING: This page is about a different car, the 2004 Toyota MR2, 2003 Toyota MR2, and 2002 Toyota MR2. However, it is still accessible from the selected car via links, so may be relevant.

WARM UP ENGINE
Allow the engine to warm up to normal operating temperature.
CONNECT TOYOTA HAND-HELD TESTER OR OBD II SCAN TOOL
1. Connect the TOYOTA hand-held tester or OBD II scan tool to the DLC3.
  
  Fig 1: Connecting Scan Tool To DLC3
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Please refer to the TOYOTA hand-held tester or OBD II scan tool operator's for further details.
CHECK IDLE SPEED . See IDLE SPEED .
CONNECT TIMING LIGHT
Connect the tester probe of a timing light to the black-red service wire in the J/B No. 1 as shown.

Fig 2: Connecting Timing Light Probe To Service Wire
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT IGNITION TIMING
1. Using SST, connect terminals to TC and CG of the DLC3.
  SST 09843-18040
  
  Fig 3: Connecting DLC3 Terminals To Check Timing
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  NOTE: After engine RPM is kept at 1,000 - 1,500 RPM for 5 seconds, check that it returns to idle speed.
2. Using a timing light, check the ignition timing.
  
  Fig 4: Checking Ignition Timing
  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: 6 - 15° BTDC @ idle

NOTE: The timing mark moves in a range between 6° and 15°.
DISCONNECT TIMING LIGHT
DISCONNECT TOYOTA HAND-HELD TESTER OR OBD II SCAN TOOL