M20A-FKS (ENGINE MECHANICAL): CAMSHAFT: REMOVAL; 2023 - 2025 MY Corolla Corolla Hatchback [03/2023

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM100000002BA09
Model Year Start: 2023	Model: Corolla Hatchback	Prod Date Range: [03/2023 - ]
Title: M20A-FKS (ENGINE MECHANICAL): CAMSHAFT: REMOVAL; 2023 - 2025 MY Corolla Corolla Hatchback [03/2023 - ]

REMOVAL

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during camshaft removal/installation are shown below.

Necessary Procedures After Parts Removed/Installed/Replaced

Replaced Part or Performed Procedure	Necessary Procedure	Effect/Inoperative Function when Necessary Procedure not Performed	Link
1: w/ Steering Lock Function 2: w/o Smart Key System 3: w/ Smart Key System 4: If transaxle compensation code read from ECM *5: If transaxle compensation code not read from ECM
Replacement of ECM	Vehicle Identification Number (VIN) registration	MIL comes on
	for K121 ECU configuration	-
	Update ECU security key	Vehicle Control History (RoB) are stored
	ECU communication ID registration (Immobiliser system)	Engine start function
Replacement of ECM*3	Code registration (Smart Key System (for Gasoline Model, Start Function))	Wireless Door Lock Control System (for Gasoline Model with Smart Key System) Smart Key System (for Gasoline Model, Entry Function) Smart Key System (for Gasoline Model, Start Function) Steering lock function*1
Replacement of ECM*2	Code registration (Immobiliser system)	Engine start Telematics System
Gas leak from exhaust system is repaired Replacement of cam timing control motor with EDU assembly Removal and installation of a cam timing control motor with EDU assembly Replacement of camshaft timing gear assembly Removal and installation of a camshaft timing gear assembly Replacement of camshaft (for intake or exhaust camshaft) Replacement of camshaft timing exhaust gear assembly Replacement of fuel pump assembly (for high pressure side) Replacement of ignition coil assembly Replacement of air fuel ratio sensor (sensor 2)	Inspection After Repair	Poor idle, etc. Engine start function, etc.
Replacement of ECM	for K120 Perform reset memory CVT oil pressure calibration Perform road test to allow TCM to learn	Large shift shock Deterioration of fuel efficiency	Initialization: Registration:
Replacement of ECM	for K121 Transfer transaxle compensation code4 Reset transaxle compensation code5 CVT oil pressure calibration Perform road test to allow ECM to learn	Large shift shock Deterioration of fuel efficiency	Initialization: Registration:

NOTICE:

This procedure includes the removal of small-head bolts. Refer to Small-Head Bolts of Basic Repair Hint to identify the small-head bolts.

Click here

HINT:

When the cable is disconnected / reconnected to the battery terminal, systems temporarily stop operating. However, each system has a function that completes learning the first time the system is used.

Learning completes when vehicle is driven

Effect/Inoperative Function when Necessary Procedure not Performed	Necessary Procedure	Link
Front Camera System	Drive the vehicle straight ahead at 15 km/h (9 mph) or more for 1 second or more.

Learning completes when vehicle is operated normally

Effect/Inoperative Function when Necessary Procedure not Performed	Necessary Procedure	Link
*1: for Hatchback
Power Door Lock Control System Back door opener*1	Perform door unlock operation with door control switch or electrical key transmitter sub-assembly switch.

PROCEDURE

1. INSTALL ENGINE SUPPORT BRIDGE

Click here

2. REMOVE ENGINE MOUNTING INSULATOR SUB-ASSEMBLY RH

Click here

3. REMOVE FUEL (ENGINE ROOM SIDE) PUMP ASSEMBLY (for High Pressure)

Click here

4. DISCONNECT NO. 1 VACUUM HOSE CONNECTOR

Click here

5. SEPARATE ENGINE WIRE

(a) Disconnect the connector and disengage the clamp.

(b) Remove the bolt, 2 nuts and separate the engine wire.

(d) Disconnect the 6 connectors and disengage the 3 clamps.

(e) Release the lock lever and disconnect the connector.

*a	Protective Tape
	Release the lock lever
	Disconnect the connector

(f) Disconnect the connector and disengage the clamp.

(g) Disconnect the connector.

(h) Remove the bolt and separate the vacuum surge tank.

(i) Disengage the 3 clamps and separate the 3 hoses.

(j) Remove the bolt and No. 3 water hose clamp bracket.

6. REMOVE VACUUM PUMP ASSEMBLY

Click here

7. REMOVE IGNITION COIL ASSEMBLY

Click here

8. REMOVE CAMSHAFT POSITION SENSOR (for Intake Side)

Click here

9. REMOVE CAMSHAFT POSITION SENSOR (for Exhaust Side)

Click here

10. REMOVE CAM TIMING OIL CONTROL SOLENOID ASSEMBLY

Click here

11. REMOVE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (EXHAUST CAMSHAFT TIMING GEAR BOLT ASSEMBLY)

Click here

12. REMOVE CAM TIMING CONTROL MOTOR WITH EDU ASSEMBLY

Click here

13. REMOVE CAM TIMING CONTROL MOTOR O-RING

Click here

14. REMOVE CYLINDER HEAD COVER SUB-ASSEMBLY

Click here

15. REMOVE SPARK PLUG TUBE GASKET

Click here

16. REMOVE FUEL PUMP LIFTER GUIDE

Click here

17. SET NO. 1 CYLINDER TO TDC (COMPRESSION)

(a) Turn the crankshaft clockwise to align the timing mark (cutout) on the crankshaft pulley assembly with the "0" timing mark on the No. 2 timing chain cover assembly.

*a	Paint Mark
*b	Timing Mark
*c	"0" Timing Mark

(b) Check that the timing marks are positioned as shown in the illustration.

HINT:

If the timing marks are not positioned as shown in the illustration, turn the crankshaft clockwise and then align them again.

(c) Place paint marks on the chain sub-assembly at points aligned with the timing marks on the camshaft timing gear assembly and camshaft timing exhaust gear assembly.

18. REMOVE STRAIGHT SCREW PLUG

Click here

19. REMOVE CAMSHAFT

(a) Rotate the crankshaft approximately 15° clockwise.

*a	Approximately 15°

(b) Rotate the crankshaft approximately 15° counterclockwise.

*a	Approximately 15°

(c) Align the pin hole of the No. 1 chain tensioner assembly with the pin hole of the chain tensioner slipper, and then insert the pin.

*a	Pin
*b	Pin Hole (No. 1 Chain Tensioner Assembly Side)
*c	Pin Hole (Chain Tensioner Slipper Side)

(d) Type A:

(1) Using the hexagonal portion of the exhaust camshaft sub-assembly, secure the exhaust camshaft sub-assembly.

NOTICE:

Do not damage the camshaft housing sub-assembly, cylinder head sub-assembly and spark plug tube.

Hold

(2) Using a 5 mm hexagon wrench, remove the 2 bolts from the camshaft timing exhaust gear assembly.

(e) Type B:

(1) Using the hexagonal portion of the exhaust camshaft sub-assembly, secure the exhaust camshaft sub-assembly.

NOTICE:

Do not damage the camshaft housing sub-assembly, cylinder head sub-assembly and spark plug tube.

Hold

(2) Using a 5 mm hexagon wrench, remove the 2 bolts from the camshaft timing exhaust gear assembly.

(f) Using the hexagonal portion of the intake camshaft sub-assembly, secure the intake camshaft sub-assembly.

*a	Hold
	Turn

NOTICE:

Do not damage the camshaft housing sub-assembly, cylinder head sub-assembly and spark plug tube.
Do not disassemble the camshaft timing gear assembly.

(g) Using a 10 mm bi-hexagon socket wrench, remove the bolt from the camshaft timing gear assembly.

(h) Using the hexagonal portion of the exhaust camshaft sub-assembly, loosen and hold the chain sub-assembly while moving the exhaust camshaft sub-assembly in the direction shown in the illustration.

*a	Hold	-	-
	Turn	-	-

(i) Move the camshaft timing gear assembly together with the camshaft timing exhaust gear assembly and chain sub-assembly toward the No. 2 timing chain cover assembly as shown in the illustration.

*1	Camshaft Timing Gear Assembly	*2	Camshaft Timing Exhaust Gear Assembly
*3	Chain Sub-assembly	-	-
	Remove in this Direction	-	-

(j) Remove the camshaft timing exhaust gear assembly from the chain sub-assembly.

(k) Remove the camshaft timing gear assembly from the chain sub-assembly.

(l) Secure the chain sub-assembly to the vehicle using rope, etc.

NOTICE:

Do not drop the chain sub-assembly into the timing chain cover assembly.

(m) Uniformly loosen and remove the 9 bolts in the order shown in the illustration.

(n) Uniformly loosen and remove the 13 bolts in the order shown in the illustration.

NOTICE:

Uniformly loosen the bolts while holding the camshaft horizontally.

*1	No. 1 Camshaft Bearing Cap
*2	No. 2 Camshaft Bearing Cap
*3	No. 3 Camshaft Bearing Cap
*4	No. 4 Camshaft Bearing Cap

(o) Remove the No. 1 camshaft bearing cap, No. 2 camshaft bearing cap, 2 No. 3 camshaft bearing caps and No. 4 camshaft bearing cap.

HINT:

Arrange the removed parts so that they can be reinstalled in their original locations.

(p) Remove the intake camshaft sub-assembly from the camshaft housing sub-assembly.

(q) Remove the exhaust camshaft sub-assembly from the camshaft housing sub-assembly.

REMOVAL

CAUTION / NOTICE / HINT

Necessary Procedures After Parts Removed/Installed/Replaced

for K121

for K120

for K121

Learning completes when vehicle is driven

Learning completes when vehicle is operated normally

PROCEDURE