ENGINE ON-VEHICLE INSPECTION

INSPECT ENGINE COOLANT

Click here
INSPECT ENGINE OIL

Click here
INSPECT BATTERY

Click here
INSPECT SPARK PLUG

Click here
INSPECT AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY
1. Remove the air cleaner filter element sub-assembly.
2. Visually check that there is no dirt, blockage, and/or damage to the air cleaner filter element.
  Tech Tips
  - If there is any dirt or a blockage in the air cleaner filter element, clean it with compressed air.
  - If any dirt or a blockage remains even after cleaning the air cleaner filter element with compressed air, replace it.
INSPECT V-RIBBED BELT TENSIONER ASSEMBLY
1. Remove the V-ribbed belt Click here.
2. Check that nothing is caught in the tensioner by turning it clockwise and counterclockwise.
  
  If a malfunction exists, replace the tensioner.
3. Install the V-ribbed belt Click here.
INSPECT VALVE LASH 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 over 30 minutes. Then perform the inspection above again.
  
  If any defects or problems are found during the inspection above, perform a lash adjuster inspection.
INSPECT IGNITION TIMING
1. Warm up the engine and stop the engine.
  
  Note
  
  A warmed up engine should have an engine coolant temperature of over 80°C (176°F), and an engine oil temperature of 60°C (140°F), and the engine speed should be stabilized.
2. When using the GTS:
  1. Connect the GTS to the DLC3.
  2. Start the engine and idle it.
  3. Turn the GTS on.
  4. Enter the following menus: Powertrain / Engine and ECT / Data List / IGN Advance.
    
    Standard ignition timing
    
    8 to 18° BTDC at idle
    
    Note
    
    When checking the ignition timing, the transmission should be in neutral.
    
    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.
  7. Monitor IGN Advance.
  8. Perform the Active Test.
    
    Standard ignition timing
    
    8 to 12° BTDC at idle
    
    Note
    
    When checking the ignition timing, the transmission should be in neutral or park.
    
    Tech Tips
    
    Refer to the GTS operator's manual for further details.
3. When not using the GTS:
  1. Remove the V-bank cover sub-assembly.
  2. Connect the tester probe of a timing light to the wire of the ignition connector for No. 1 cylinder.
    
    Note
    
    Use a timing light which can detect the primary signal.
  3. Text in Illustration
    
    *a Front view of DLC3
    
    Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3.
    
    SST
    
    09843-18040
    Note
    
    Confirm the terminal numbers before connecting them. Connecting the wrong terminals can damage the engine.
    
    When checking the ignition timing, the transmission should be in neutral.
  4. Using a timing light, check the ignition timing.
    
    Standard ignition timing
    
    8 to 12° BTDC at idle
  5. Remove SST from the DLC3.
  6. Check the ignition timing.
    
    Standard ignition timing
    
    8 to 18° BTDC at idle
  7. Check that the ignition timing advances immediately when the engine speed is increased.
  8. Disconnect the timing light from the engine.
  9. Install the V-bank cover sub-assembly.
INSPECT ENGINE IDLE SPEED
1. Warm up and stop the engine.
  
  Note
  
  A warmed up engine should have an engine coolant temperature of over 80°C (176°F) and an engine oil temperature of 60°C (140°F), and the engine speed should be stabilized.
2. When using the GTS:
  1. Connect the GTS to the DLC3.
    
    Note
    
    Switch off all accessories and A/C before connecting the GTS.
  2. Race the engine at 2500 rpm for approx. 90 seconds.
  3. Turn the GTS on.
  4. Enter the following menus: powertrain / Engine and ECT / Data list / Engine Speed.
    
    Standard idle speed
    
    600 to 700 rpm
    
    Note
    
    When checking the idle speed, the transmission should be in neutral.
    
    Tech Tips
    
    Refer to the GTS operator's manual for further details.
    
    If the idle speed is not as specified, check the air intake system.
  5. Disconnect the GTS from the DLC3.
3. When not using the GTS:
  1. Text in Illustration
    
    *a Front view of DLC3
    
    Using SST, connect the tachometer probe to terminal 9 (TAC) of the DLC3.
    
    SST
    
    09843-18040
    
    Note
    
    Confirm the terminal numbers before connecting them. Connecting the wrong terminals can damage the engine.
  2. Race the engine at 2500 rpm for approx. 90 seconds.
  3. Check the idle speed.
    
    Standard idle speed (Transmission neutral position)
    
    600 to 700 rpm
    
    Note
    
    When checking the idle speed, the transmission should be in neutral.
    
    If the speed is not as specified, check the air intake system.
  4. Disconnect the tachometer from the DLC3.
INSPECT COMPRESSION
1. Warm up and stop the engine.
  
  Note
  
  A warmed up engine should have an engine coolant temperature of over 80°C (176°F) and an engine oil temperature of 60°C (140°F), and the engine speed should be stabilized.
2. Remove engine room side cover.
3. Remove the cool air intake duct seal.
4. Remove the V-bank cover.
5. Remove the bolt and No. 1 air cleaner inlet.
6. Remove the air cleaner cap with the air cleaner hose.
7. Disconnect the 3 clamps.
8. Disconnect the 4 connectors.
9. Disconnect the throttle with motor body connector.
10. Remove the 6 ignition coils.
11. Remove the 6 spark plugs.
12. Text in Illustration
  
  *a Release
  
  *b Move
  
  Disconnect the 2 injector driver connectors as shown in the illustration.
13. Insert a compression gauge into the spark plug hole.
14. Fully open the throttle.
15. While cranking the engine, measure the compression pressure.
  
  Standard compression pressure
  
  1400 kPa (14.3 kgf/cm², 199 psi) or higher
  
  Minimum pressure
  
  980 kPa (10.0 kgf/cm², 142 psi)
  
  Note
  
  The measurement must be done as quickly as possible.
  
  Tech Tips
  
  Always use a fully charged battery to obtain engine speed of 250 rpm or more.
16. Perform the inspection above for each cylinder.
  
  Difference between each cylinder
  
  100 kPa (1.0 kgf/cm², 15 psi) or less
17. If the cylinder compression in one or more cylinders is low, pour a small amount of engine oil into the cylinder through the spark plug hole. Then perform the first 3 steps under "inspect the cylinder compression pressure" for the cylinders with low compression.
  Tech Tips
  - If adding oil helps boost the compression, it is likely that the piston rings and/or cylinder bore is worn or damaged.
  - If pressure stays low, a valve may be stuck or seated improperly, or there may be leakage in the gasket.
18. Text in Illustration
  
  *a Move
  
  Connect the 2 injector driver connectors as shown in the illustration.
19. Install the 6 spark plugs.
  
  Torque:
  
  18 N*m { 184 kgf*cm, 13 ft.*lbf }
20. Install the 6 ignition coils.
  
  Torque:
  
  10 N*m { 102 kgf*cm, 7 ft.*lbf }
21. Connect the throttle with motor body connector.
22. Connect the 4 connectors.
23. Connect the 3 clamps.
24. Install the air cleaner cap with the air cleaner hose.
25. Install the No. 1 air cleaner inlet with the bolt.
  
  Torque:
  
  5.0 N*m { 51 kgf*cm, 44 in.*lbf }
26. Install the V-bank cover.
27. Install the cool air intake duct seal.
28. Install the engine room side cover.

Standard ignition timing
8 to 18° BTDC at idle

Standard ignition timing
8 to 12° BTDC at idle

Text in Illustration
*a	Front view of DLC3

Standard ignition timing
8 to 12° BTDC at idle

Standard ignition timing
8 to 18° BTDC at idle

Standard idle speed
600 to 700 rpm

Text in Illustration
*a	Front view of DLC3

Standard idle speed (Transmission neutral position)
600 to 700 rpm

Text in Illustration
*a	Release
*b	Move

Standard compression pressure
1400 kPa (14.3 kgf/cm², 199 psi) or higher

Minimum pressure
980 kPa (10.0 kgf/cm², 142 psi)

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

Text in Illustration
*a	Move

INSPECT CO/HC

Tech Tips

This is a check for determining whether or not the idle CO / HC complies with regulations.

Start the engine.
Keep the engine speed at 2500 rpm for approx. 180 seconds.
Insert the CO / HC meter testing probe at least 40 cm (1.31 ft.) into the tailpipe during idling.

Immediately check CO / HC concentration at idle and/or 2500 rpm.

Tech Tips

When performing the 2 mode (2500 rpm and idle) test, follow the measurement order prescribed by the applicable local regulations.
If the CO / HC concentration does not comply with regulations, troubleshoot in the order given below.

Check the DTCs Click here.

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

CO	HC	Symptom	Causes
Normal	High	Rough idle	1. Faulty ignitions Incorrect timing Fouled, shorted or improperly gapped plugs 2. Leaky intake and exhaust valves 3. Leaky cylinder
Low	High	Rough idle (Fluctuating HC reading)	1. Vacuum leaks PCV hose Intake manifold Throttle body 2. Lean mixture causing misfire
High	High	Rough idle (Black smoke from exhaust)	1. Restricted air filter 2. Faulty fuel SFI system Faulty pressure Defective engine coolant temperature sensor Faulty ECM Faulty injector Faulty throttle position sensor Faulty mass air flow meter

Symptom

Causes

Normal

High

Rough idle

1. Faulty ignitions

Incorrect timing

Fouled, shorted or improperly gapped plugs

2. Leaky intake and exhaust valves

3. Leaky cylinder

Low

High

Rough idle

(Fluctuating HC reading)

1. Vacuum leaks

PCV hose

Intake manifold

Throttle body

2. Lean mixture causing misfire

High

Rough idle

(Black smoke from exhaust)

1. Restricted air filter

2. Faulty fuel SFI system

Faulty pressure

Defective engine coolant temperature sensor

Faulty ECM

Faulty injector

Faulty throttle position sensor

Faulty mass air flow meter