ENGINE ON-VEHICLE INSPECTION

PROCEDURE

INSPECT ENGINE COOLANT

Click here
INSPECT ENGINE OIL

Click here
INSPECT BATTERY

Click here
INSPECT AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY
1. Remove the air cleaner cap sub-assembly.
  
  Click here
2. Remove the air cleaner filter element sub-assembly.
  
  Click here
3. Visually check that the air cleaner filter element sub-assembly is not excessively damaged or oily.
  
  If necessary, replace the air cleaner filter element sub-assembly.
  Tech Tips
  - If there is any foreign matter or clogs in the air cleaner filter element sub-assembly, clean it with compressed air.
  - If any foreign matter or clogs remain even after cleaning the air cleaner filter element sub-assembly with compressed air, replace it.
4. Install the air cleaner filter element sub-assembly.
  
  Click here
5. Install the air cleaner cap sub-assembly.
  
  Click here
INSPECT SPARK PLUG

Click here
INSPECT FAN AND GENERATOR V BELT

Click here
INSPECT VALVE AND ADJUSTER NOISE
1. Rev up the engine several times. Check that the engine does not emit unusual noises. If unusual noises occur, warm up the engine and idle it for 30 minutes or more, then perform the preceding inspections.
  
  Tech Tips
  
  If any defects or problems are found during the preceding inspections, perform valve lash adjuster inspection.
  
  Click here
INSPECT ENGINE IDLE SPEED
1. Warm up and stop the engine.
2. When using the GTS:
  1. Connect the GTS to the DLC3.
  2. Turn the engine switch on (IG).
  3. Enter the following menus: Powertrain / Engine / Data List / Engine Speed.
  4. Inspect the engine idle speed.
    
    Standard Idle Speed
    
    770 to 870 rpm
    Note
    - Turn all electrical systems and the A/C off.
    - Inspect the idle speed with the cooling fan off.
    - When checking the idle speed, the transaxle should be in neutral.
  5. Turn the engine switch off.
  6. Disconnect the GTS from the DLC3.
3. When not using the GTS:
  1. *a DLC3
    
    Using SST, connect a tachometer probe to terminal 9 (TAC) of the DLC3.
    
    Note
    
    Be sure to connect the tachometer to the correct terminal. Connecting the wrong terminals can cause damage.
    
    SST
    
    09843-18040
  2. Turn the engine switch on (IG).
  3. Inspect the engine idle speed.
    
    Standard Idle Speed
    
    770 to 870 rpm
    Note
    - Turn all electrical systems and the A/C off.
    - Inspect the idle speed with the cooling fans off.
    - When checking the idle speed, the transaxle should be in neutral.
  4. Turn the engine switch off.
  5. Disconnect the tachometer probe from terminal 9 (TAC) of the DLC3.
INSPECT COMPRESSION
Note

Keep the intake manifold and spark plug holes free of foreign matter when measuring the compression pressure.
1. Check for DTCs.
  
  Click here
2. Warm up and stop the engine.
3. Remove the 4 spark plugs.
  
  Click here
4. Disconnect the 4 fuel injector connectors.
  
  Note
  
  Disable fuel injection in order to prevent catalyst damage due to unburned gasoline.
5. Inspect the cylinder compression pressure.
  1. Insert a compression gauge into the spark plug hole.
  2. Fully open the throttle.
  3. While cranking the engine, measure the compression pressure.
    
    Standard pressure
    
    1373 kPa (14.0 kgf/cm², 199 psi)
    
    Minimum pressure
    
    1079 kPa (11.0 kgf/cm², 157 psi)
    
    Pressure difference between each cylinder
    
    98 kPa (1.0 kgf/cm², 14.2 psi) or less
    
    Note
    
    Use a fully-charged battery so that the engine speed can be increased to 250 rpm or more.
    
    Inspect the other cylinders in the same way.
    
    Measure the compression pressure as quickly as possible.
  4. If the cylinder compression pressure is low, pour a small amount of engine oil into the cylinder through the spark plug hole, then inspect it again.
    
    Tech Tips
    
    If adding oil increases the compression pressure, the piston rings and/or cylinder bore may be worn or damaged.
    
    If the compression pressure stays low, a valve may be stuck or seated improperly, or there may be leaks from the gasket.
6. Connect the 4 fuel injector connectors.
7. Install the 4 spark plugs
  
  Click here
8. Clear the DTCs.
  
  Click here
  
  Note
  
  After the inspection, clear the DTCs, check for DTCs again and make sure the normal system code is output.

Standard Idle Speed
770 to 870 rpm

Standard Idle Speed
770 to 870 rpm

Standard pressure
1373 kPa (14.0 kgf/cm², 199 psi)

Minimum pressure
1079 kPa (11.0 kgf/cm², 157 psi)

Pressure difference between each cylinder
98 kPa (1.0 kgf/cm², 14.2 psi) or less

INSPECT CO/HC

Tech Tips

This check determines whether or not the idle CO/HC complies with regulations.

Start the engine.
Run the engine at 2500 rpm for approximately 180 seconds.
Insert a CO/HC meter testing probe at least 40 cm (1.3 ft.) into the tailpipe during idle

Check the CO/HC concentration during idle and when the engine is running at 2500 rpm.

Tech Tips

When doing a 2 mode (with the engine idling/running at 2500 rpm) test, the measurement procedures are determined by applicable local regulations.

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

Check for DTCs.

Click here

See the following table for possible causes, then inspect the applicable parts and repair them if necessary.

CO	HC	Problem	Possible Cause
Normal	High	Rough idle	Faulty ignition: Incorrect timing Fouled, shorted or improperly gapped plugs Incorrect valve clearance Leaks in intake or exhaust valves Leaks in cylinders
Low	High	Rough idle (Fluctuating HC reading)	Vacuum leaks: PCV hoses Supercharger assembly Throttle body with motor assembly Brake booster line Lean mixture causing misfire
High	High	Rough idle (Black smoke from exhaust)	Restricted air cleaner filter element sub-assembly Plugged PCV valve (ventilation valve sub-assembly) Faulty EFI systems: Pressure regulator Engine coolant temperature sensor Mass air flow meter sub-assembly ECM Injector assemblies Throttle body with motor assembly