A25A-FKS (ENGINE MECHANICAL): ENGINE: ON-VEHICLE INSPECTION; 2020 - 2024 MY Camry [09/2019

Last Modified: 11-20-2023	6.11:8.1.0	Doc ID: RM100000001KAMF
Model Year Start: 2020	Model: Camry	Prod Date Range: [09/2019 - ]
Title: A25A-FKS (ENGINE MECHANICAL): ENGINE: ON-VEHICLE INSPECTION; 2020 - 2024 MY Camry [09/2019 - ]

ON-VEHICLE INSPECTION

CAUTION / NOTICE / HINT

CAUTION:

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

PROCEDURE

1. INSPECT ENGINE COOLANT

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2. INSPECT ENGINE OIL

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3. INSPECT BATTERY CONDITION

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4. INSPECT SPARK PLUG

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5. INSPECT AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY

(a) Remove the air cleaner filter element sub-assembly.

(b) Visually check that the air cleaner filter element sub-assembly is not damaged or excessively oily. If necessary, replace the air cleaner filter element sub-assembly.

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.

6. INSPECT V-RIBBED BELT

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7. INSPECT V-RIBBED BELT TENSIONER ASSEMBLY

(a) Remove the V-ribbed belt.

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(b) Turn the V-ribbed belt tensioner assembly clockwise and counterclockwise and check that it turns smoothly and does not catch.

HINT:

If the V-ribbed belt tensioner assembly does not turn smoothly or catches, replace the V-ribbed belt tensioner assembly.

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8. INSPECT VALVE LASH ADJUSTER ASSEMBLY NOISE

(a) Rev up the engine several times. Check that the engine does not emit unusual noises.

(b) 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.

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9. 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 neutral or park.

(a) Warm up and stop the engine.

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

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

Powertrain > Engine > Data List

Tester Display
Ignition Timing Cylinder #1

Standard Ignition Timing:

0 to 15° BTDC at idle

(f) 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

(g) Monitor Ignition Timing Cylinder #1 of the Data List.

Standard Ignition Timing:

8 to 12° BTDC at idle

(h) Enter the following menus: Powertrain / Engine / Active Test / Activate the TC Terminal / OFF.

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

10. INSPECT ENGINE IDLE SPEED

NOTICE:

Check the engine idle speed with the cooling fan off.
Turn off all electrical systems and the A/C.
When checking the engine idle speed, the transaxle should be in neutral or park.

(a) Warm up and stop the engine.

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

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

Powertrain > Engine > Data List

Tester Display
Engine Speed

(f) Read the value displayed on the tester.

Standard Idle Speed:

600 to 700 rpm

11. INSPECT COMPRESSION

NOTICE:

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

(a) Warm up and stop the engine.

(b) Check for DTCs.

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(d) Remove the front wheel opening extension pad LH.

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(e) Remove the No. 1 engine under cover.

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(f) Remove the No. 2 engine under cover assembly.

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(g) Remove the 4 spark plugs.

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(h) Disconnect the fuel injector connector (for Port Injection).

(i) Disconnect the fuel injector connector (for Direct Injection).

(j) Check the cylinder compression pressure.

(1) Insert a compression gauge into the spark plug hole.

(2) Fully open the throttle.

(3) While cranking the engine, measure the compression pressure.

Standard Compression Pressure:

1500 kPa (15.3 kgf/cm², 218 psi)

Minimum Compression Pressure:

1300 kPa (13.3 kgf/cm², 189 psi)

Pressure Difference between Each Cylinder:

200 kPa (2.0 kgf/cm², 29 psi) or less

NOTICE:

Always use a fully charged battery to obtain an engine speed of 250 rpm or more.
Inspect all cylinders in the same way.
Measure the compression pressure as quickly as possible.

(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 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.

(k) Connect the fuel injector connector (for Direct Injection).

(l) Connect the fuel injector connector (for Port Injection).

(m) Install the 4 spark plugs.

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(n) Install the No. 2 engine under cover assembly.

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(o) Install the No. 1 engine under cover.

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(p) Install the front wheel opening extension pad LH.

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(q) Install the front wheel opening extension pad RH.

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(r) Clear the DTCs.

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NOTICE:

After the inspection, clear the DTCs, check for DTCs again and make sure the normal system code is output.

12. INSPECT CO/HC

HINT:

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

(a) Start the engine.

(b) Run the engine at 2500 rpm for approximately 180 seconds.

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

HINT:

When performing a 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.

(1) Check for DTCs.

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(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 Faulty EGR
Low	High	Rough idle (Fluctuating HC reading)	Vacuum leaks: PCV hoses Intake manifold Throttle body with motor assembly Lean mixture causing misfire Faulty EGR
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) Faulty EGR