ENGINE ON-VEHICLE INSPECTION

PROCEDURE

INSPECT ENGINE COOLANT

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INSPECT ENGINE OIL

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CHECK BATTERY CONDITION

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INSPECT SPARK PLUG

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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.
  Tech Tips
  - If necessary, replace the air cleaner filter element sub-assembly.
  - If there is any dirt or clogs in the air cleaner filter element sub-assembly, clean it with compressed air.
  - If any dirt or clogs remain 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 TENSIONER ASSEMBLY
1. Remove the V-ribbed belt.
  
  Click here
2. Check that nothing is caught in the V-ribbed belt tensioner assembly by turning it clockwise and counterclockwise.
  
  Tech Tips
  
  If a malfunction exists, replace the V-ribbed belt tensioner assembly.
3. Install the V-ribbed belt.
  
  Click here
INSPECT VALVE LASH ADJUSTER ASSEMBLY 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 inspection.
  
  Tech Tips
  
  If any defects or problems are found during the 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.
  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.
    
    Powertrain > Engine > Data List
    
    Tester Display
    
    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 the electrical systems and the A/C.
    - When checking the ignition timing, the transaxle should be in neutral or park.
  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.
    
    Powertrain > Engine > Active Test
    
    Active Test Display
    
    Connect the TC and TE1
    
    Data List Display
    
    IGN Advance
  7. Monitor IGN Advance.
  8. Perform the Active Test.
    
    Standard Ignition Timing
    
    8 to 12° BTDC at idle
    Note
    - 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.
3. When not using the GTS:
  1. *a 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 may damage 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 clip of the timing light to the ignition coil wire for the No. 1 cylinder.
    
    Note
    
    Use a timing light that detects primary signals.
  4. Start the engine and run it at idle.
  5. Check the ignition timing at idle.
    
    Standard Ignition Timing
    
    8 to 12° BTDC at idle
    Note
    - 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.
    Tech Tips
    
    Run the engine at 1000 to 1300 rpm for 5 seconds, and then check that the engine speed returns to engine idle speed.
  6. Disconnect terminals 13 (TC) and 4 (CG) of the DLC3.
  7. Check the ignition timing at idle.
    
    Standard Ignition Timing
    
    9.5 to 24.5° BTDC at idle
    Note
    - 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.
  8. Confirm that the ignition timing advances immediately when the engine speed is increased.
  9. Disconnect the clip of the timing light from the ignition coil wire for the No. 1 cylinder.
  10. Install the V-bank cover sub-assembly.
    
    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. Start the engine and run it at idle.
  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. 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.
3. When not using the GTS:
  1. *a DLC3
    
    Using SST, connect a tachometer probe to terminal 9 (TAC) of the DLC3.
    
    SST
    
    09843-18030
    
    Note
    
    Be sure to connect the tachometer probe to the correct terminal. Connecting the wrong terminals may damage electrical components.
  2. Start the engine and run it at idle.
  3. 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.
  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. Warm up and stop the engine.
2. Check for DTCs.
  
  Click here
3. Remove the 6 spark plugs.
  
  Click here
4. 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 Compression 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.
    
    Inspect the other cylinders in the same way.
    
    Measure the compression pressure 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 then inspect the cylinder compression pressure 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 in the cylinder head gasket.
5. Install the 6 spark plugs.
  
  Click here
6. 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.

Tester Display
IGN Advance

Standard Ignition Timing
9.5 to 24.5° BTDC at idle

Active Test Display
Connect the TC and TE1

Data List Display
IGN Advance

Standard Ignition Timing
8 to 12° BTDC at idle

Standard Ignition Timing
8 to 12° BTDC at idle

Standard Ignition Timing
9.5 to 24.5° BTDC at idle

Tester Display
Engine Speed

Standard Idle Speed
600 to 700 rpm

Standard Idle Speed
600 to 700 rpm

Standard Compression Pressure
1300 kPa (13.3 kgf/cm², 189 psi)

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

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

Tech Tips

When performing the 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, perform troubleshooting 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	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: Fuel pressure regulator assembly Engine coolant temperature sensor Mass air flow meter sub-assembly ECM Fuel injector assemblies Throttle position sensor (built into 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:

Fuel pressure regulator assembly
Engine coolant temperature sensor
Mass air flow meter sub-assembly
ECM
Fuel injector assemblies
Throttle position sensor (built into throttle with motor body assembly)