ENGINE ON-VEHICLE INSPECTION

PROCEDURE

INSPECT ENGINE COOLANT

Click here
INSPECT ENGINE OIL

Click here
INSPECT AUXILIARY BATTERY

Click here
INSPECT AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY
1. Remove the air cleaner cap.
2. Remove the air cleaner filter element sub-assembly.
3. Visually check that the air cleaner filter is not excessively damaged or oily.
  
  If necessary, replace the air cleaner filter element sub-assembly.
4. Install the air cleaner filter element sub-assembly.
5. Install the air cleaner cap.
INSPECT SPARK PLUG

Click here
INSPECT FAN AND GENERATOR V BELT

Click here
INSPECT VALVE LASH ADJUSTER ASSEMBLY NOISE
1. Put the engine in inspection mode (maintenance mode).
  
  Click here
2. Warm up the engine.
3. Check that the engine does not emit unusual noises.
4. If unusual noises occur, warm up the engine and idle it for over 30 minutes. Then perform the inspection above again.
  
  Tech Tips
  
  If any defects or problems are found during the inspection above, check the valve lash adjuster assembly.
  
  Click here
INSPECT IGNITION TIMING
1. Put the engine in inspection mode (maintenance mode).
  
  Click here
2. Warm up and stop the engine.
3. When using the GTS:
  1. Connect the GTS to the DLC3.
  2. Put the engine in inspection mode (maintenance mode).
    
    Click here
  3. Turn the GTS on.
  4. Enter the following menus: Powertrain / Engine and ECT / Data List / IGN Advance.
    
    Powertrain > Engine and ECT > Data List
    
    Tester Display
    
    IGN Advance
    
    Standard ignition timing
    
    5 to 20° BTDC @ idle
    Note
    - Turn all the electrical systems and the A/C off.
    - Check the ignition timing with the cooling fans off.
    - When checking the ignition timing, the shift lever should be in P.
  5. Check that the ignition timing advances immediately when the engine speed is increased.
  6. Enter the following menus: Powertrain / Engine and ECT / Active Test / Connect the TC and TE1.
    
    Powertrain > Engine and ECT > Active Test
    
    Tester Display
    
    Connect the TC and TE1
  7. Monitor IGN Advance of the Data List.
    
    Standard ignition timing
    
    8 to 12 BTDC @ idle
    Note
    - Turn all the electrical systems and the A/C off.
    - Check the ignition timing with the cooling fans off.
    - When checking the ignition timing, the shift lever should be in P.
  8. Check that the ignition timing advances immediately when the engine speed is increased.
  9. Turn the power switch off.
  10. Disconnect the GTS from the DLC3.
4. 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. Put the engine in inspection mode (maintenance mode).
    
    Click here
  3. *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 shift lever should be in P.
  4. Using a timing light, check the ignition timing.
    
    Standard ignition timing
    
    8 to 12° BTDC @ idle
    Note
    - Turn all the electrical systems and the A/C off.
    - Check the ignition timing with the cooling fans off.
    - When checking the ignition timing, the shift lever should be in P.
  5. Remove SST from the DLC3.
  6. Check the ignition timing.
    
    Standard ignition timing
    
    5 to 20° BTDC @ idle
    Note
    - Turn all the electrical systems and the A/C off.
    - Check the ignition timing with the cooling fans off.
    - When checking the ignition timing, the shift lever should be in P.
    If the ignition timing is not as specified, check the valve timing.
  7. Check that the ignition timing advances immediately when the engine speed is increased.
  8. Turn the power switch off.
  9. Disconnect the timing light from the engine.
INSPECT ENGINE IDLE SPEED
1. Put the engine in inspection mode (maintenance mode).
  
  Click here
2. Warm up and stop the engine.
3. When using the GTS:
  1. Connect the GTS to the DLC3.
  2. Put the engine in inspection mode (maintenance mode).
    
    Click here
  3. Start the engine and run it at idle.
  4. Turn the GTS on.
  5. Enter the following menus: Powertrain / Engine and ECT / Data List / Engine Speed.
    
    Powertrain > Engine and ECT > Data List
    
    Tester Display
    
    Engine Speed
    
    Standard idle speed
    
    950 to 1050 rpm
    Note
    - Turn all electrical systems and the A/C off.
    - Inspect the idle speed with the cooling fans off.
    - When checking the idle speed, the shift lever should be in P.
  6. Disconnect the GTS from the DLC3.
4. When not using the GTS:
  1. *a Front view of DLC3
    
    Using SST, connect a tachometer probe to terminal 9 (TAC) of the DLC3.
    
    SST
    
    09843-18030
    
    Note
    
    Confirm the terminal number before connecting the probe. Connecting the wrong terminals can damage the engine.
  2. Put the engine in inspection mode (maintenance mode).
    
    Click here
  3. Start the engine and run it at idle.
  4. Check the idle speed.
    
    Standard idle speed
    
    950 to 1050 rpm
    Note
    - Turn all electrical systems and the A/C off.
    - Inspect the idle speed with the cooling fans off.
    - When checking the idle speed, the shift lever should be in P.
  5. Disconnect the tachometer probe from the DLC3.
INSPECT COMPRESSION
1. Put the engine in inspection mode (maintenance mode).
  
  Click here
2. Warm up and stop the engine.
3. Check for DTCs.
  - w/ EGR System:
    
    Click here
  - w/o EGR System:
    
    Click here
4. Remove the 4 spark plugs.
  
  Click here
  
  Note
  
  DTCs will be stored if the inspection is performed with the ignition coil assembly connectors disconnected. Make sure that the ignition coil assembly connectors are connected during the inspection.
5. Check the cylinder compression pressure.
  1. Insert a compression gauge into the spark plug hole.
  2. Connect the GTS to the DLC3.
  3. Turn the power switch on (IG).
  4. Turn the GTS on.
    
    Note
    
    Check the HV battery voltage in the Data List to ensure that the battery is fully charged.
  5. Enter the following menus: Powertrain / Hybrid Control / Active Test / Compression Test / ON.
    
    Powertrain > Hybrid Control > Active Test
    
    Tester Display
    
    Compression Test
  6. Depress and hold the brake pedal, and turn the power switch on (READY).
    
    Standard compression pressure
    
    1100 kPa (11.2 kgf/cm², 160 psi) or higher
    
    Minimum compression pressure
    
    800 kPa (8.2 kgf/cm², 116 psi)
    
    Pressure difference between each cylinder
    
    100 kPa (1.0 kgf/cm², 15 psi) or less
    Note
    - Inspect the other cylinders in the same way.
    - Measure the compression pressure as quickly as possible.
    - Noise may be emitted from the hybrid vehicle transaxle assembly. However, this is not a malfunction.
  7. If the cylinder compression pressure 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 helps boost the compression, it is likely that the piston rings and/or cylinder bore is worn or damaged.
    - If the pressure stays low, a valve may be stuck or seated improperly, or there may be leakage from the gasket.
6. Remove the compression gauge.
7. Install the 4 spark plugs.
  
  Click here
8. Clear the DTCs.
  - w/ EGR System:
    
    Click here
  - w/o EGR System:
    
    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
5 to 20° BTDC @ idle

Tester Display
Connect the TC and TE1

Standard ignition timing
8 to 12 BTDC @ idle

Standard ignition timing
8 to 12° BTDC @ idle

Standard ignition timing
5 to 20° BTDC @ idle

Tester Display
Engine Speed

Standard idle speed
950 to 1050 rpm

Standard idle speed
950 to 1050 rpm

Tester Display
Compression Test

Standard compression pressure
1100 kPa (11.2 kgf/cm², 160 psi) or higher

Minimum compression pressure
800 kPa (8.2 kgf/cm², 116 psi)

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

INSPECT CO/HC

Tech Tips

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

Put the engine in inspection mode (maintenance mode).

Click here
Start the engine.
Keep 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 idling.

Immediately check the CO/HC concentration at idle and at 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 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 correct the applicable causes if necessary.

CO	HC	Symptom	Causes
Normal	High	Rough idle	1. Faulty ignition Incorrect timing Fouled, shorted or improperly gapped plugs 2. Incorrect valve clearance 3. Leaky intake and exhaust valves 4. Leaky cylinder 5. Faulty EGR (w/ EGR System)
Low	High	Rough idle (Fluctuating HC reading)	1. Vacuum leaks PCV hose Intake manifold Throttle body 2. Lean mixture causing misfire 3. Faulty EGR (w/ EGR System)
High	High	Rough idle (Black smoke from exhaust)	1. Restricted air filter 2. Plugged PCV valve 3. Faulty SFI system Faulty pressure Defective engine coolant temperature sensor Faulty ECM Faulty injector Faulty throttle position sensor Faulty mass air flow meter sensor 4. Faulty EGR (w/ EGR System)

Symptom

Causes

Normal

High

Rough idle

1. Faulty ignition

Incorrect timing
Fouled, shorted or improperly gapped plugs

2. Incorrect valve clearance
3. Leaky intake and exhaust valves
4. Leaky cylinder
5. Faulty EGR (w/ EGR System)

Low

High

Rough idle

(Fluctuating HC reading)

1. Vacuum leaks

PCV hose
Intake manifold
Throttle body

2. Lean mixture causing misfire
3. Faulty EGR (w/ EGR System)

High

Rough idle

(Black smoke from exhaust)

1. Restricted air filter
2. Plugged PCV valve
3. Faulty SFI system

Faulty pressure
Defective engine coolant temperature sensor
Faulty ECM
Faulty injector
Faulty throttle position sensor
Faulty mass air flow meter sensor

4. Faulty EGR (w/ EGR System)