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.

PROCEDURE

INSPECT ENGINE COOLANT

Click here
INSPECT ENGINE OIL

Click here
INSPECT BATTERY

Click here
INSPECT FAN AND GENERATOR V BELT

Click here
INSPECT V-RIBBED BELT TENSIONER ASSEMBLY

Click here
INSPECT AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY
1. Remove the air cleaner filter element sub-assembly from the air cleaner case sub-assembly.
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 sub-assembly.
INSPECT SPARK PLUG

Click here
INSPECT IGNITION TIMING
1. Warm up the engine 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 / Active Test / Connect the TC and TE1.
    
    Powertrain > Engine > Active Test
    
    Active Test Display
    
    Connect the TC and TE1
    
    Data List Display
    
    IGN Advance
  5. Inspect the ignition timing during idling.
    
    Standard ignition timing
    
    8 to 12° 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.
  6. Cancel the Active Test.
  7. Enter the following menus: Powertrain / Engine / Data List / IGN Advance.
    
    Powertrain > Engine > Data List
    
    Tester Display
    
    IGN Advance
  8. Inspect the ignition timing during idling.
    
    Standard ignition timing
    
    7 to 24° BTDC @ idle
    
    Note
    
    When checking the ignition timing, the transmission should be in N or P.
  9. Check that the ignition timing advances immediately when the engine speed is increased.
3. When not using the GTS:
  1. *a Front view of DLC3
    
    Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3.
    
    SST
    
    09843-18040
    
    Note
    
    Do not improperly connect the terminals. This may damage the engine.
  2. 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.
    - After checking, be sure to wrap the wire harness with tape.
  3. Start the engine.
  4. Inspect the ignition timing during idling.
    
    Standard ignition timing
    
    8 to 12° 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. Inspect the ignition timing during idling.
    
    Standard ignition timing
    
    7 to 24° BTDC @ idle
  7. Disconnect the timing light from the wire of the ignition coil connector for the No. 1 cylinder.
INSPECT ENGINE IDLE SPEED
1. Warm up 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
  5. Inspect the engine idle speed.
    
    Standard idle speed
    
    650 to 750 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.
  6. Turn the ignition switch off.
  7. 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. Race the engine at 2500 rpm for approximately 90 seconds.
  3. Inspect the engine idle speed.
    
    Standard idle speed
    
    650 to 750 rpm
    
    Note
    
    When checking the idle speed, the transmission should be in N or P.
  4. Disconnect the tachometer tester probe from the DLC3.
INSPECT COMPRESSION
1. Warm up and stop the engine.
2. Check for DTCs.
  
  Click here
  
  Powertrain > Engine > Clear DTCs
3. Drain the engine coolant.
  
  Click here
4. Remove the intake air surge tank.
  
  Click here
5. Remove the 6 spark plugs.
  
  Click here
6. Disconnect the 6 fuel injector connectors.
  
  Note
  
  Stop fuel injection to prevent damage to the catalyst due to unburned fuel.
7. Inspect the cylinder compression pressure.
  1. Insert a compression gauge into the spark plug hole.
  2. While cranking the engine, measure the compression pressure.
    
    Compression pressure
    
    1300 kPa (13.3 kgf/cm², 189 psi) or higher
    
    Minimum pressure
    
    1000 kPa (10.2 kgf/cm², 145 psi)
    
    Difference between each cylinder
    
    100 kPa (1.0 kgf/cm², 15 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.
  3. If the cylinder compression is low, pour a small amount of engine oil into the cylinder through the spark plug hole, and 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, the valve may be stuck or seated improperly, or there may be leakage from the gasket.
8. Connect the 6 fuel injector connectors.
9. Install the 6 spark plugs.
  
  Click here
10. Install the intake air surge tank.
  
  Click here
11. Add engine coolant.
  
  Click here
12. Check for DTCs.
  
  Click here
  
  Powertrain > Engine > Trouble Codes

Active Test Display
Connect the TC and TE1

Data List Display
IGN Advance

Standard ignition timing
8 to 12° BTDC @ idle

Tester Display
IGN Advance

Standard ignition timing
7 to 24° BTDC @ idle

Standard ignition timing
8 to 12° BTDC @ idle

Standard ignition timing
7 to 24° BTDC @ idle

Tester Display
Engine Speed

Standard idle speed
650 to 750 rpm

Standard idle speed
650 to 750 rpm

Compression pressure
1300 kPa (13.3 kgf/cm², 189 psi) or higher

Minimum pressure
1000 kPa (10.2 kgf/cm², 145 psi)

Difference between each cylinder
100 kPa (1.0 kgf/cm², 15 psi) or less

INSPECT 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 tailpipe.
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.

Click here
Check the heated oxygen sensor operation.

Click here

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

CO	HC	Problem	Possible Cause
Normal	High	Rough idling	Faulty ignition: Incorrect timing Fouled, shorted or improperly gapped plugs Incorrect valve clearance Leaky intake and exhaust valves Leaky cylinders
Low	High	Rough idling (Fluctuating HC reading)	Vacuum leaks: PCV hoses Intake manifold Throttle body with motor assembly Brake booster line Lean mixture causing misfire
High	High	Rough idling (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

Problem

Possible Cause

Normal

High

Rough idling

Faulty ignition:

Incorrect timing
Fouled, shorted or improperly gapped plugs

Incorrect valve clearance
Leaky intake and exhaust valves
Leaky cylinders

Low

High

Rough idling

(Fluctuating HC reading)

Vacuum leaks:

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

Lean mixture causing misfire

High

Rough idling

(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