ENGINE ON-VEHICLE INSPECTION

PROCEDURE

INSPECT ENGINE COOLANT

Click here
INSPECT ENGINE OIL

Click here
CHECK BATTERY CONDITION

Click here
INSPECT AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY
1. Remove the air cleaner filter element sub-assembly.
2. 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 dirt or a blockage in the air cleaner filter element sub-assembly, clean it with compressed air.
  - If any dirt or a blockage remains even after cleaning the air cleaner filter element sub-assembly with compressed air, replace it.
3. Install the air cleaner filter element sub-assembly.
INSPECT V-RIBBED BELT

Click here
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 V-ribbed belt tensioner.
3. Install the V-ribbed belt Click here.
CHECK SPARK PLUG

Click here
INSPECT VALVE LASH ADJUSTER ASSEMBLY 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 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.
  
  Tech Tips
  
  A warmed up engine should have an engine coolant temperature of over 80°C (176°F), an engine oil temperature of 60°C (140°F), and the engine speed should be stabilized.
2. When using the GTS:
  
  Check the ignition timing.
  1. Connect the GTS to the DLC3.
  2. Start the engine and run it at idle.
  3. Turn the GTS on.
  4. Enter the following menus: Powertrain / Engine / Data List / IGN Advance.
    
    Standard ignition timing
    
    9.5 to 24.5° BTDC at idle
    Note
    - Check the ignition timing with the cooling fans off.
    - Turn off all electrical systems and the A/C.
    - When checking the ignition timing, the transaxle should be in neutral or park.
    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 / ON.
  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 transaxle 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. Text in Illustration
    
    *1 DLC3
    
    Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3.
    
    SST
    
    09843-18040
    Note
    
    Confirm the terminals before connecting them. Connecting the wrong terminals may result in damage to electrical components.
    
    Check the ignition timing with the cooling fans off.
    
    Turn off all the electrical systems and the A/C.
    
    When checking the ignition timing, the transaxle should be in neutral or park.
  2. Remove the V-bank cover sub-assembly Click here.
  3. Connect the timing light tester probe to the ignition coil wire for No. 1 cylinder.
    
    Note
    
    Use a timing light that detects primary signals.
  4. Check the ignition timing at idle.
    
    Standard ignition timing
    
    8 to 12° BTDC at idle
    
    Note
    
    When checking the ignition timing, the transaxle should be in neutral or park.
    
    Tech Tips
    
    Run the engine at 1000 to 1300 rpm for 5 seconds, and then check that the engine rpm returns to idle speed.
  5. Disconnect terminals 13 (TC) and 4 (CG) of the DLC3.
  6. Check the ignition timing at idle.
    
    Standard ignition timing
    
    9.5 to 24.5° BTDC at idle
  7. Confirm that the ignition timing advances immediately when the engine rpm is increased.
  8. Remove the timing light from the engine.
  9. Install the V-bank cover sub-assembly Click here.
INSPECT ENGINE IDLE SPEED
1. Warm up and stop the engine.
  
  Tech Tips
  
  A warmed up engine should have an engine coolant temperature of over 80°C (176°F), 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 run it at idle.
  3. Turn the GTS on.
  4. Enter the following menus: Powertrain / Engine / Data List / Engine Speed.
  5. Read the value displayed on the tester.
    
    Standard idle speed
    
    600 to 700 rpm
    Note
    - Check the idle speed with the cooling fans off.
    - Turn off all the electrical systems and the A/C.
    - When checking the idle speed, the transaxle 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. Text in Illustration
    
    *1 DLC3
    
    Using SST, connect a tachometer probe to terminal 9 (TAC) of the DLC3.
    
    SST
    
    09843-18030
  2. Check the idle speed.
    
    Standard idle speed
    
    600 to 700 rpm
    Note
    - Check the idle speed with the cooling fans off.
    - Turn off all the electrical systems and the A/C.
    - When checking the idle speed, the transaxle should be in neutral or park.
INSPECT COMPRESSION
1. Warm up and stop the engine.
  
  Tech Tips
  
  A warmed up engine should have an engine coolant temperature of over 80°C (176°F), an engine oil temperature of 60°C (140°F), and the engine speed should be stabilized.
2. Remove the 6 spark plugs Click here.
3. Check the cylinder compression pressure.
  1. Insert a compression gauge into the spark plug hole.
  2. While cranking the engine, measure the compression pressure.
    
    Standard compression pressure
    
    1300 kPa (13.3 kgf/cm², 189 psi)
    
    Minimum pressure
    
    1000 kPa (10.2 kgf/cm², 145 psi)
    
    Note
    
    Always use a fully charged battery to obtain an engine speed of 250 rpm or more.
    
    Check the compression pressure of the other cylinders 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.
    
    Tech Tips
    
    If adding oil increases the compression, the piston rings and/or cylinder bore may be worn or damaged.
    
    If the pressure stays low, a valve may be stuck or seated improperly, or there may be leakage in the cylinder head gasket.
4. Install the 6 spark plugs Click here.

Standard ignition timing
9.5 to 24.5° BTDC at idle

Standard ignition timing
8 to 12° BTDC at idle

Text in Illustration
*1	DLC3

Standard ignition timing
8 to 12° BTDC at idle

Standard ignition timing
9.5 to 24.5° BTDC at idle

Standard idle speed
600 to 700 rpm

Text in Illustration
*1	DLC3

Standard idle speed
600 to 700 rpm

Standard compression pressure
1300 kPa (13.3 kgf/cm², 189 psi)

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

INSPECT CO/HC

Tech Tips

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

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

Immediately check CO/HC concentration during idle and when running at 2500 rpm.

Tech Tips

When performing the 2 mode (with the engine idling/running at 2500 rpm) test, follow the measurement order determined by applicable local regulations.

If the CO/HC concentration does not comply with the regulations, perform troubleshooting 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	Problem	Cause
Normal	High	Rough idle	Faulty ignition: Incorrect valve timing Fouled, shorted or improperly gapped spark plugs Incorrect valve clearance (valve lash adjuster assembly) Leaks in intake or exhaust valves Leaks in cylinders
Low	High	Rough idle (Fluctuating HC reading)	Vacuum leaks: PCV hoses Intake manifold Throttle with motor body 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 Faulty SFI system: Faulty fuel pressure regulator assembly Defective engine coolant temperature sensor Defective mass air flow meter sub-assembly Faulty ECM Faulty fuel injector assemblies Faulty throttle position sensor (built in throttle with motor body assembly)

Problem

Cause

Normal

High

Rough idle

Faulty ignition:

Incorrect valve timing
Fouled, shorted or improperly gapped spark plugs

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

Low

High

Rough idle

(Fluctuating HC reading)

Vacuum leaks:

PCV hoses
Intake manifold
Throttle with motor body 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
Faulty SFI system:

Faulty fuel pressure regulator assembly
Defective engine coolant temperature sensor
Defective mass air flow meter sub-assembly
Faulty ECM
Faulty fuel injector assemblies
Faulty throttle position sensor (built in throttle with motor body assembly)