RM38T0EC _51 Engine / Hybrid System _144958 M20F-FXS, M20G-FXS ENGINE MECHANICAL _0604257 ENGINE G

M20F-FXS, M20G-FXS ENGINE MECHANICAL ENGINE ON-VEHICLE INSPECTION

CAUTION / NOTICE / HINT

CAUTION:: To prevent injury due to contact with an operating cooling fan, keep your hands and clothing away from the cooling fans when working in the engine compartment with the engine running or the power switch on (IG).

PROCEDURE

Hide Display 1.INSPECT ENGINE COOLANT (for Engine)

Click hereEngine / Hybrid System>M20F-FXS, M20G-FXS (COOLING)>COOLING SYSTEM>ON-VEHICLE INSPECTION202307,999999,_51,_144716,_0602995,RM100000002BNLZ,

Hide Display 2.INSPECT ENGINE OIL

Click hereEngine / Hybrid System>M20F-FXS, M20G-FXS (LUBRICATION)>LUBRICATION SYSTEM>ON-VEHICLE INSPECTION202307,999999,_51,_144998,_0604330,RM100000002BTW9,

Hide Display 3.INSPECT AUXILIARY BATTERY

Click herePower Source / Network>M20F-FXS, M20G-FXS (BATTERY / CHARGING)>CHARGING SYSTEM>ON-VEHICLE INSPECTION202307,999999,_57,_145000,_0605077,RM100000002BXU2,

Hide Display 19100P 4.INSPECT SPARK PLUG

Click hereEngine / Hybrid System>M20F-FXS, M20G-FXS (ENGINE CONTROL)>IGNITION SYSTEM>ON-VEHICLE INSPECTION202307,999999,_51,_144956,_0608096,RM100000002C7I2,

Hide Display 17801 5.INSPECT AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY

Click hereGeneral>MAINTENANCE>M20F-FXS, M20G-FXS AIR CLEANER FILTER ELEMENT>REMOVAL202307,999999,_V1,_104397,_0604325,RM100000002BTVX_04_0003,

Hide Display 13750 6.INSPECT VALVE LASH ADJUSTER ASSEMBLY NOISE

Put the engine in inspection mode.

Click hereGeneral>INTRODUCTION>REPAIR INSTRUCTION>INSPECTION MODE PROCEDURE202201,999999,_V1,_107171,_0486700,RM100000001XIMR,

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 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.; Click hereEngine / Hybrid System>M20F-FXS, M20G-FXS (ENGINE MECHANICAL)>ENGINE UNIT>INSPECTION202307,999999,_51,_144958,_0604254,RM100000002BTSA_01_0002,

Hide Display 7.INSPECT IGNITION TIMING

NOTICE:: ·

Check the ignition timing with the cooling fan off.

·

Turn off all electrical systems and the A/C.

·

When checking the ignition timing, the transaxle should be in park.

Put the engine in inspection mode.

Click hereGeneral>INTRODUCTION>REPAIR INSTRUCTION>INSPECTION MODE PROCEDURE202201,999999,_V1,_107171,_0486700,RM100000001XIMR,

Warm up and stop the engine.

Connect the GTS to the DLC3.

Put the engine in inspection mode.

Click hereGeneral>INTRODUCTION>REPAIR INSTRUCTION>INSPECTION MODE PROCEDURE202201,999999,_V1,_107171,_0486700,RM100000001XIMR,

Enter the following menus: Powertrain / Engine / Data List / Ignition Timing Cylinder #1.

Powertrain > Engine > Data List

Tester Display
Ignition Timing Cylinder #1

50003 372 213

Standard Ignition Timing:: 0 to 15° BTDC at idle

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

Enter the following menus: Powertrain / Engine / Active Test / Activate the TC Terminal / ON.

Powertrain > Engine > Active Test

Active Test Display
Activate the TC Terminal

Data List Display
Ignition Timing Cylinder #1

50004 372 22 213

Monitor Ignition Timing Cylinder #1 of the Data List.

Standard Ignition Timing:: 8 to 12° BTDC at idle

Hide Display 8.INSPECT ENGINE IDLE SPEED

NOTICE:: ·

Check the ignition timing with the cooling fan off.

·

Turn off all electrical systems and the A/C.

·

When checking the ignition timing, the transaxle should be in park.

Put the engine in inspection mode.

Click hereGeneral>INTRODUCTION>REPAIR INSTRUCTION>INSPECTION MODE PROCEDURE202201,999999,_V1,_107171,_0486700,RM100000001XIMR,

Warm up and stop the engine.

Put the engine in inspection mode.

Click hereGeneral>INTRODUCTION>REPAIR INSTRUCTION>INSPECTION MODE PROCEDURE202201,999999,_V1,_107171,_0486700,RM100000001XIMR,

Enter the following menus: Powertrain / Engine / Data List / Engine Speed.

Powertrain > Engine > Data List

Tester Display
Engine Speed

50003 372 211

Read the value displayed on the GTS.

Standard Idle Speed:: 950 to 1050 rpm

Hide Display 9.INSPECT COMPRESSION

NOTICE:: Keep the spark plug holes free of foreign matter when measuring the compression pressure.

Put the engine in inspection mode.

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Warm up and stop the engine.

Check for DTCs.

Click hereEngine / Hybrid System>M20F-FXS, M20G-FXS (ENGINE CONTROL)>SFI SYSTEM>DTC CHECK / CLEAR202307,999999,_51,_144956,_0604911,RM100000002BWPH,

Remove the air cleaner cap with air cleaner hose.

Click hereGeneral>MAINTENANCE>M20F-FXS, M20G-FXS AIR CLEANER FILTER ELEMENT>REMOVAL202307,999999,_V1,_104397,_0604325,RM100000002BTVX,

Using an 8 mm socket wrench, remove the 3 bolts to separate the throttle body with motor assembly from the intake manifold.

Remove the 4 spark plugs.

Click hereGeneral>MAINTENANCE>M20F-FXS, M20G-FXS SPARK PLUG>REMOVAL202307,999999,_V1,_104397,_0604229,RM100000002BTJ5,

NOTICE:: 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.

Disconnect the No. 5 engine wire connector.

Remove the No. 1 engine under cover assembly.

Click hereEngine / Hybrid System>M20F-FXS, M20G-FXS (ENGINE MECHANICAL)>ENGINE ASSEMBLY>REMOVAL202307,999999,_51,_144958,_0604262,RM100000002BTSY_01_0306,

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*a	Lock Lever

Disengage the claw and raise the lock lever to disconnect the No. 6 engine wire connector as shown in the illustration.

Check the cylinder compression pressure.

Insert a compression gauge into the spark plug hole.

ii.

Connect the GTS to the DLC3.

iii.

Turn the power switch on (IG).

iv.

Turn the GTS on.

NOTICE:: Check the HV battery voltage in the Data List to ensure that the battery is fully charged.

Enter the following menus: Powertrain / Hybrid Control / Active Test / Compression Test / ON.

Powertrain > Hybrid Control > Active Test

Tester Display
Compression Test

50004 397 42000

vi.

Depress and hold the brake pedal, and turn the power switch on (READY). Then check the compression pressure.

Standard Compression Pressure:: 1400 kPa (14.3 kgf/cm², 203 psi)

Minimum Compression Pressure:: 800 kPa (8.2 kgf/cm², 116 psi)

Pressure Difference between Each Cylinder:: 200 kPa (2.0 kgf/cm², 29 psi) or less

NOTICE:: ·

Noise may be emitted from the hybrid vehicle transaxle assembly. However, this is not a malfunction.

·

Inspect all cylinders in the same way.

·

Measure the compression pressure as quickly as possible.

vii.

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 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.

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*a	Lock Lever

Connect the No. 6 engine wire connector and push down the lock lever to engage the claw as shown in the illustration.

Install the No. 1 engine under cover assembly.

Click hereEngine / Hybrid System>M20F-FXS, M20G-FXS (ENGINE MECHANICAL)>ENGINE ASSEMBLY>INSTALLATION202307,999999,_51,_144958,_0604262,RM100000002BTSX_01_0389,

Connect the No. 5 engine wire connector.

Install the 4 spark plugs.

Click hereGeneral>MAINTENANCE>M20F-FXS, M20G-FXS SPARK PLUG>INSTALLATION202307,999999,_V1,_104397,_0604229,RM100000002BTJ6,

NOTICE:: 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.

Using an 8 mm socket wrench, install the throttle body with motor assembly to the intake manifold with the 3 bolts.

Torque:: 10 N*m (102 kgf*cm, 7 ft.*lbf)

Install the air cleaner cap with air cleaner hose.

Click hereGeneral>MAINTENANCE>M20F-FXS, M20G-FXS AIR CLEANER FILTER ELEMENT>INSTALLATION202307,999999,_V1,_104397,_0604325,RM100000002BTVY,

Clear the DTCs.

Click hereEngine / Hybrid System>M20F-FXS, M20G-FXS (ENGINE CONTROL)>SFI SYSTEM>DTC CHECK / CLEAR202307,999999,_51,_144956,_0604911,RM100000002BWPH,

NOTICE:: 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.

Hide Display 10.INSPECT CO/HC

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

Put the engine in inspection mode.

Click hereGeneral>INTRODUCTION>REPAIR INSTRUCTION>INSPECTION MODE PROCEDURE202201,999999,_V1,_107171,_0486700,RM100000001XIMR,

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 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.

Check for DTCs.

Click hereEngine / Hybrid System>M20F-FXS, M20G-FXS (ENGINE CONTROL)>SFI SYSTEM>DTC CHECK / CLEAR202307,999999,_51,_144956,_0604911,RM100000002BWPH,

ii.

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	1. Faulty ignition: - Incorrect valve timing - Fouled, shorted or improperly gapped spark plugs 2. Incorrect valve clearance (valve lash adjuster assembly) 3. Leaks in intake or exhaust valves 4. Leaks in cylinders 5. Faulty EGR
Low	High	Rough idle (Fluctuating HC reading)	1. Vacuum leaks: - PCV hoses - Intake manifold - Throttle body with motor assembly 2. Lean mixture causing misfire 3. Faulty EGR
High	High	Rough idle (Black smoke from exhaust)	1. Restricted air cleaner filter element sub-assembly 2. Plugged PCV valve 3. Faulty SFI systems: - Fuel pressure regulator assembly - Engine coolant temperature sensor - Mass air flow meter - ECM - Fuel injector assemblies - Throttle position sensor (built into throttle body with motor assembly) 4. Faulty EGR