On-Vehicle Inspection

If unusual noises occur, warm up the engine and idle it for over 30 minutes. Then repeat this procedure.

HINT:

If any defects or problems are found during the inspection above, perform lash adjuster inspection (See INSPECTION ).

Check the ignition timing.

1. Connect the intelligent tester to the DLC3.
2. Enter DATA LIST MODE with the intelligent tester.

   Ignition timing: 

   8 to 12° BTDC at idle 

   HINT:

   Refer to the intelligent tester operator's manual for help on selecting the DATA LIST.

Fig 1: Identifying Connectivity Intelligent Tester To DLC3

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Check the ignition timing.

1. Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3.

   SST 09843-18040 

   NOTE:

   • Confirm the terminal numbers before connecting them. Connection with a wrong terminal can damage the engine.
   • Turn off all electrical systems before connecting the terminals.
   • Perform this inspection after the cooling fan motor is turned off.
   Fig 2: Identifying DLC3 Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Remove the V-bank cover.
3. Pull out the red lead wire harness.
4. Connect the tester terminal of the timing light to the red lead wire as shown in the illustration.
   NOTE: Use a timing light which detects the first signal.
5. Check the ignition timing at idle.

   Ignition timing: 

   8 to 12° BTDC at idle 

   Fig 3: Identifying Tester Terminal Of Timing Light To Red Lead Wire

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   NOTE: When checking the ignition timing, the transmission should be in the neutral position.

   HINT:

   Run the engine at 1,000 to 1,300 rpm for 5 seconds, and then check that the engine rpm returns to idle speed.

6. Disconnect terminals 13 (TC) and 4 (CG) of the DLC3.
7. Check the ignition timing at idle.

   Ignition timing: 

   5 to 15° BTDC at idle 

8. Confirm that the ignition timing moves to the advanced angle side when the engine rpm is increased.
9. Remove the timing light.

Check the idle speed.

1. Connect the intelligent tester to the DLC3.
2. Enter DATA LIST MODE with the intelligent tester.

   Idle speed: 

   600 to 700 rpm 

   NOTE:

   • When checking the idle speed, the transmission should be in the neutral position.
   • Check the idle speed with the cooling fan off.
   • Switch off all accessories and air conditioning before connecting the intelligent tester.

   HINT:

   Refer to the intelligent tester operator's manual for further details.

Fig 4: Connect Intelligent Tester To DLC3

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Check the idle speed.

1. Using SST, connect tachometer test probe to terminal 9 (TAC) of the DLC3.

   SST 09843-18030 

2. Check the idle speed.

   Idle speed: 

   600 to 700 rpm 

1. Insert a compression gauge into the spark plug hole.
2. While cranking the engine, measure the compression pressure.

   Compression pressure: 

   1.4 MPa (14 kgf/cm ²  , 199 psi) 

   Minimum pressure: 

   0.98 MPa (10 kgf/cm ²  , 142 psi) 

   Difference between each cylinder: 

   0.1 MPa (1.0 kgf/cm ²  , 15 psi) 

   NOTE:

   • Always use a fully charged battery to obtain an engine speed of 250 rpm or more.
   • Check the other cylinders' compression pressure in the same way.
   • This measurement must be done as quickly as possible.
3. If the cylinder compression is low, pour a small amount of engine oil into the cylinder through the spark plug hole and inspect again.

   HINT:

   • If adding oil increases the compression, the piston rings and / or cylinder bore may be worn or damaged.
   • If pressure stays low, a valve may be stuck or seated improperly, or there may be leakage in the gasket.

HINT:

Check regulations and restrictions in your area when performing 2 mode CO/CH concentration testing (engine check at both idle speed and at 2,500 rpm).

If the CO/HC concentration does not comply with regulations, troubleshoot in the order given below.

1. Check A/F sensor and heated oxygen sensor operation.
2. See the table below for possible causes, and then inspect and repair.