Ignition Timing: Inspection

WARNING: This page is about a different car, the 2005 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.

REMOVE BATTERY CLAMP COVER
REMOVE INTAKE AIR CONNECTOR
REMOVE V-BANK COVER
WARM UP ENGINE
Allow the engine to warm up to the normal operating temperature.
CONNECT LEXUS HAND-HELD TESTER OR OBD II SCAN TOOL
1. Connect the LEXUS hand-held tester or OBD II scan tool to the DLC3.
2. Please refer to the LEXUS hand-held tester or OBD II scan tool operator's manual for further details.
Fig 1: Connecting Lexus Hand-Held Tester Or OBD II Scan Tool To DLC3
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
CONNECT TIMING LIGHT TO ENGINE
Connect the tester probe of a timing light to the wire of the ignition coil connector for No. 1 cylinder.

Fig 2: Connecting Tester Probe To Ignition Coil
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
CHECK IDLE SPEED
1. Race the engine speed at 2,500 rpm for approx. 90 seconds.
2. Check the idle speed.
  Idle speed:
  
  700 +/- 50 rpm
INSPECT IGNITION TIMING
1. Using SST, connect terminal TC and E1 of the DLC1.
  SST 09843-18020
  
  Fig 3: Connecting Terminal TC And E1 Using SST
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Using a timing light, check the ignition timing.
  Ignition timing:
  
  5-15° BTDC @ idle
  
  (Transmission in neutral position)
  
  Fig 4: Checking Ignition Timing Using Timing Light
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Remove SST from the DLC1.
  SST 09843-18020
DISCONNECT TIMING LIGHT FROM ENGINE
DISCONNECT LEXUS HAND-HELD TESTER OR OBD II SCAN TOOL
REINSTALL V-BANK COVER
REINSTALL INTAKE AIR CONNECTOR
REINSTALL BATTERY CLAMP COVER