On-Vehicle Inspection [10/2022 - ]: Procedure

HINT: 

Refer to ON-VEHICLE INSPECTION [10/2022 - ]

HINT: 

Refer to ON-VEHICLE INSPECTION [10/2022 - ]

HINT: 

Refer to ON-VEHICLE INSPECTION [10/2022 - ]

HINT: 

Refer to ON-VEHICLE INSPECTION [10/2022 - ]

1. Remove the air cleaner filter element sub-assembly.
2. Visually check that the air cleaner filter element sub-assembly is not damaged or excessively oily.

   HINT: 

   • 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.

HINT: 

See step  1

Pre-procedure1

• Remove the V-ribbed belt.

  HINT: 

  Refer to REMOVAL [10/2022 - ]

• Turn the V-ribbed belt tensioner assembly clockwise and counterclockwise and check that it turns smoothly and does not catch.
• If the V-ribbed belt tensioner assembly does not turn smoothly or catches, replace the V-ribbed belt tensioner assembly.

Post-procedure1

• Install the V-ribbed belt.

  HINT: 

  Refer to INSTALLATION [10/2022 - ]

1. Put the engine in Inspection Mode (Maintenance Mode).

   Powertrain > Hybrid Control > Utility 

   Tester Display
   Inspection Mode

2. Rev up the engine several times. Check that the engine does not emit unusual noises.
3. If unusual noises occur, warm up the engine and idle it for 30 minutes or more, then perform the inspection.

   HINT: 

   If any defects or problems are found during the inspection, perform the valve lash adjuster assembly inspection.

   Refer to PROCEDURE - Step 2

Pre-procedure1

• Put the engine in Inspection Mode (Maintenance Mode).

  Powertrain > Hybrid Control > Utility 

  Tester Display
  Inspection Mode

• Start the engine and warm it up.

• Monitor Ignition Timing Cylinder #1 of the Data List.

  Powertrain > Engine > Data List 

  Tester Display
  Ignition Timing Cylinder #1

  Standard Ignition Timing

  -5 to 15° BTDC at idle

• Check that the ignition timing advances immediately when the engine speed is increased.

• Monitor Ignition Timing Cylinder #1 of the Data List.

  Powertrain > Engine > Active Test 

  Active Test Display
  Activate the TC Terminal

  Data List Display
  Ignition Timing Cylinder #1

  Standard Ignition Timing

  8 to 12° BTDC at idle

Post-procedure1

• None

Pre-procedure1

• Put the engine in Inspection Mode (Maintenance Mode).

  Powertrain > Hybrid Control > Utility 

  Tester Display
  Inspection Mode

• Start the engine and warm it up.

• Read the value displayed on the GTS.

  Powertrain > Engine > Data List 

  Tester Display
  Engine Speed

  Standard Idle Speed

  950 to 1050 rpm

Post-procedure1

• None

Pre-procedure1

• Put the engine in Inspection Mode (Maintenance Mode).

  Powertrain > Hybrid Control > Utility 

  Tester Display
  Inspection Mode

• Warm up and stop the engine.
• Check for DTCs.

  Powertrain > Engine > Trouble Codes 

• Remove the 4 spark plugs.
  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.

  HINT: 

  Refer to REMOVAL [10/2022 - ]

• Disconnect the 4 direct fuel injector assembly connectors and No. 5 engine wire connector.

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

• Check the cylinder compression pressure.
  1. Insert a compression gauge into the spark plug hole.

     Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  2. Turn the ignition switch ON. (*1)
  3. Depress and hold the brake pedal, and turn the ignition switch to ON (READY). Then check the compression pressure.

     Powertrain > Hybrid Control > Active Test 

     Tester Display
     Compression Test

     Standard Compression Pressure

     Item	Minimum Compression Pressure	Specified Condition	Result
     Cylinder 1	1100 kPa 11.2 kgf/cm2 160 psi	1300 kPa 13.3 kgf/cm2 189 psi	kPa kgf/cm2 psi
     Cylinder 2	1100 kPa 11.2 kgf/cm2 160 psi	1300 kPa 13.3 kgf/cm2 189 psi	kPa kgf/cm2 psi
     Cylinder 3	1100 kPa 11.2 kgf/cm2 160 psi	1300 kPa 13.3 kgf/cm2 189 psi	kPa kgf/cm2 psi
     Cylinder 4	1100 kPa 11.2 kgf/cm2 160 psi	1300 kPa 13.3 kgf/cm2 189 psi	kPa kgf/cm2 psi
     Pressure Difference between Each Cylinder	-	200 kPa or less 2.0 kgf/cm2 or less 29 psi or less	kPa kgf/cm2 psi

     NOTE:

     • Measure the compression pressure as quickly as possible.
     • Noise may be emitted from the hybrid vehicle transaxle assembly. However, this is not a malfunction.
     • When resuming the compression check after releasing the ignition switch, turn the ignition switch off once, return to the (*1) procedure.
     • If no engine cranking after pressing the ignition switch, perform the K0 Learning Promotion since the transaxle may be malfunctioning.

       Refer to DATA LIST / ACTIVE TEST [10/2022 - 10/2024] , or refer to DATA LIST / ACTIVE TEST [10/2024 - ]

     HINT: 

     Performing the K0 Learning Promotion in the Active Test of the transaxle is possible to start the engine and check the K0 abnormal.

  4. If the cylinder compression pressure is low, pour a small amount of engine oil into the cylinder through the spark plug hole and inspect it again.

     HINT: 

     • If adding engine 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.

Post-procedure1

• Connect the 4 direct fuel injector assembly connectors and No. 5 engine wire connector.
• Install the 4 spark plugs.

  HINT: 

  Refer to INSTALLATION [10/2022 - ]

• Clear the DTCs.

  Powertrain > Engine > Clear DTCs 

  NOTE:

  After performing the inspection, clear the DTCs and confirm that DTCs are not stored again or that the normal system code is output if using a check wire.

HINT: 

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

Pre-procedure1

• Put the engine in Inspection Mode (Maintenance Mode).

  Powertrain > Hybrid Control > Utility 

  Tester Display
  Inspection Mode

• Run the engine speed at 2500 rpm for approximately 120 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 at idle and then at an engine speed of 2500 rpm.

  HINT: 

  When performing a 2 mode test (with the engine idling/running at 2500 rpm), 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.

  1. Check for DTCs.

     Powertrain > Engine > Trouble Codes 

  2. 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 body with motor assembly Lean mixture causing misfire
     High	High	Rough idle (Black smoke from exhaust)	Restricted air cleaner filter element sub-assembly Plugged PCV valve Faulty SFI systems: Fuel pressure regulator assembly Engine coolant temperature sensor Mass air flow meter sub-assembly ECM Fuel injector assemblies Throttle position sensor (built into throttle body with motor assembly)

Post-procedure1

• None