ДВИГАТЕЛЬ ПРОВЕРКА БЕЗ СНЯТИЯ С АВТОМОБИЛЯ

CAUTION / NOTICE / HINT

CAUTION:

To prevent injury due to contact with an operating fan and generator V-belt or cooling fan, keep your hands and clothing away from the fan and generator V-belt and cooling fans when working in the engine compartment with the engine running.

Tech Tips

The type of ignition switch used on this model differs according to the specifications of the vehicle. For the expressions listed in this section, refer to the "Ignition Switch Expressions" precaution.

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PROCEDURE

INSPECT ENGINE COOLANT

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INSPECT ENGINE OIL

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INSPECT BATTERY

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INSPECT AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY
1. Remove the air cleaner filter element sub-assembly from the air cleaner case.
2. Check that the air cleaner filter element sub-assembly is not excessively dirty.
  
  If the air cleaner filter element sub-assembly is excessively dirty, replace the air cleaner filter element sub-assembly.
  
  If cleaning the air cleaner filter element sub-assembly, blow compressed air to clean it.
  Note
  - Do not start the engine with the air cleaner filter element sub-assembly removed, as this may damage the engine.
  - When using an air cleaner filter element sub-assembly that uses compressed air, wear safety glasses and a dust mask in order to protect your health.
  Tech Tips
  
  When an excessive amount of dirt is present, replace the air cleaner filter element sub-assembly.
3. Reinstall the air cleaner filter element sub-assembly to the air cleaner case.
INSPECT SPARK PLUG

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INSPECT FAN AND GENERATOR V BELT

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INSPECT V-RIBBED BELT TENSIONER ASSEMBLY

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INSPECT NO. 1 IDLER PULLEY
1. Idle the engine, and then stop the engine. Check that the fan and generator V belt is between the edges of the idler pulley.
2. Remove the fan and generator V belt.
  
  Click here
3. *a Turn
  
  Turn the pulley, and check that the idler bearing moves smoothly and quietly.
  
  If necessary, replace the No. 1 idler pulley.
4. Install the fan and generator V belt.
  
  Click here
INSPECT VALVE LASH ADJUSTER NOISE
1. Rev up the engine several times. Check that the engine does not emit unusual noises.
2. If unusual noises occur, warm up the engine and idle it for 30 minutes or more, then perform the preceding inspection.
  
  Tech Tips
  
  If any defects or problems are found during the preceding inspection, perform valve lash adjuster assembly inspection.
  
  Click here
INSPECT IGNITION TIMING
1. Warm up and stop the engine.
2. When using the GTS:
  1. Connect the GTS to the DLC3.
    
    Note
    
    Switch off all the accessories and the A/C before connecting the GTS.
  2. Start the engine and idle it.
  3. Turn the GTS on.
  4. Enter the following menus: Powertrain / Engine / Data List / IGN Advance.
    
    Powertrain > Engine > Data List
    
    Tester Display
    
    IGN Advance
    
    Standard ignition timing
    
    2 to 15° BTDC @ idle
    
    Note
    
    When checking the ignition timing, the transmission should be in N or P.
    
    Tech Tips
    
    Refer to the GTS operator's manual for further details.
  5. Check that the ignition timing advances immediately when the engine speed is increased.
  6. Enter the following menus: Powertrain / Engine / Active Test / Connect the TC and TE1.
    
    Powertrain > Engine > Active Test
    
    Tester Display
    
    Connect the TC and TE1
  7. Monitor IGN Advance.
  8. Perform the Active Test.
    
    Standard ignition timing
    
    3 to 7° BTDC @ idle
    
    Note
    
    When checking the ignition timing, the transmission should be in N or P.
    
    Tech Tips
    
    Refer to the GTS operator's manual for further details.
3. When not using the GTS:
  1. Connect the tester probe of a timing light to the wire of the ignition coil connector for the No. 1 cylinder.
    
    Note
    
    Use a timing light that detects primary signals.
  2. Start the engine and idle it.
  3. *a Front view of DLC3
    
    Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3.
    
    SST
    
    09843-18040
    
    Note
    
    When checking the ignition timing, the transmission should be in N or P.
  4. Using the timing light, measure the ignition timing.
    
    Standard ignition timing
    
    3 to 7° BTDC @ idle
    Note
    - Turn all the electrical systems and the A/C off.
    - When checking the ignition timing, the transmission should be in N or P.
  5. Remove SST from the DLC3.
  6. Check the ignition timing.
    
    Standard ignition timing
    
    2 to 15° BTDC @ idle
  7. Confirm that the ignition timing advances immediately when the engine speed is increased.
  8. Turn the ignition switch off.
  9. Disconnect the timing light from the wire of the ignition coil connector for the No. 1 cylinder.
INSPECT ENGINE IDLE SPEED
1. Warm up and stop the engine.
2. When using the GTS:
  1. Connect the GTS to the DLC3.
    
    Note
    
    Switch off all accessories and the A/C before connecting the GTS.
  2. Start the engine and idle it.
  3. Turn the GTS on.
  4. Enter the following menus: Powertrain / Engine / Data List / Engine Speed.
    
    Powertrain > Engine > Data List
    
    Tester Display
    
    Engine Speed
    
    Standard idle speed
    
    600 to 700 rpm
    
    Note
    
    When checking the idle speed, the transmission should be in N or P.
    
    Tech Tips
    
    Refer to the GTS operator's manual for further details.
  5. Turn the ignition switch off.
  6. Disconnect the GTS from the DLC3.
3. When not using the GTS:
  1. *a Front view of DLC3
    
    Using SST, connect a tachometer tester probe to terminal 9 (TAC) of the DLC3.
    
    SST
    
    09843-18030
    
    Note
    
    Switch off all accessories and the A/C before connecting the terminals.
  2. Start the engine and idle it.
  3. Check the idle speed.
    
    Standard idle speed
    
    600 to 700 rpm
INSPECT COMPRESSION
1. Warm up and stop the engine.
2. Check for DTCs.
  
  Click here
  
  Powertrain > Engine > Trouble Codes
3. Disconnect the 4 fuel injector connectors.
4. Remove the 4 spark plugs.
  
  Click here
5. Check 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 compression pressure
    
    1230 kPa (12.5 kgf/cm², 178 psi) or higher
    
    Minimum pressure
    
    880 kPa (9.0 kgf/cm², 128 psi)
    
    Difference between each cylinder
    
    68 kPa (0.7 kgf/cm², 9.9 psi) or less
    Note
    - Use a fully-charged battery so the engine speed can be increased to 250 rpm or more.
    - Inspect the other cylinders in the same way.
    - Measure the compression in as short a time 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 and 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, the valve may be stuck or seated improperly, or there may be leakage from the gasket.
6. Install the 4 spark plugs.
  
  Click here
7. Connect the 4 fuel injector connectors.
8. Check for DTCs.
  
  Click here
  
  Powertrain > Engine > Trouble Codes

Tester Display
IGN Advance

Standard ignition timing
2 to 15° BTDC @ idle

Tester Display
Connect the TC and TE1

Standard ignition timing
3 to 7° BTDC @ idle

Standard ignition timing
3 to 7° BTDC @ idle

Standard ignition timing
2 to 15° BTDC @ idle

Tester Display
Engine Speed

Standard idle speed
600 to 700 rpm

Standard idle speed
600 to 700 rpm

Standard compression pressure
1230 kPa (12.5 kgf/cm², 178 psi) or higher

Minimum pressure
880 kPa (9.0 kgf/cm², 128 psi)

Difference between each cylinder
68 kPa (0.7 kgf/cm², 9.9 psi) or less

CHECK CO/HC

Start and warm up the engine.
Run the engine at 2500 rpm for approximately 180 seconds, and then idle the engine.
Insert a CO/HC meter testing probe at least 40 cm (1.31 ft.) into the tail exhaust pipe assembly.
Check the CO/HC concentration at idle.

Standard idle CO concentration

0 to 0.5%

Standard idle HC concentration

Refer to applicable local regulation

Standard idle CO concentration
0 to 0.5%

Standard idle HC concentration
Refer to applicable local regulation

If the CO/HC concentration is not as specified, perform troubleshooting in the order given below.

Check the air fuel ratio sensor operation.

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Check the heated oxygen sensor operation.

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See the table below for possible causes, and then inspect and repair the applicable causes if necessary.

CO	HC	Problems	Causes
Normal	High	Rough idle	Faulty ignition: Incorrect timing Fouled, shorted or improperly gapped plugs Incorrect valve clearance (valve lash adjuster assembly) Leaks in intake and exhaust valves Leaks in cylinders
Low	High	Rough idle (Fluctuating HC reading)	Vacuum leaks: PCV hoses Intake manifold 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 sub-assembly Faulty SFI system: Faulty fuel pressure regulator assembly Defective engine coolant temperature sensor Defective intake mass air flow meter sub-assembly Faulty ECM Faulty fuel injector assemblies Faulty throttle body with motor assembly

Problems

Causes

Normal

High

Rough idle

Faulty ignition:

Incorrect timing
Fouled, shorted or improperly gapped plugs

Incorrect valve clearance (valve lash adjuster assembly)
Leaks in intake and exhaust valves
Leaks in cylinders

Low

High

Rough idle

(Fluctuating HC reading)

Vacuum leaks:

PCV hoses
Intake manifold
Throttle body with motor assembly
Brake booster line

Lean mixture causing misfire

High

Rough idle

(Black smoke from exhaust)

Restricted air cleaner filter element sub-assembly
Plugged PCV valve sub-assembly
Faulty SFI system:

Faulty fuel pressure regulator assembly
Defective engine coolant temperature sensor
Defective intake mass air flow meter sub-assembly
Faulty ECM
Faulty fuel injector assemblies
Faulty throttle body with motor assembly