Caution / Notice / Hint

WARNING: This page is about a different car, the 2024 Lexus TX 550h+. However, it is still accessible from the selected car via links, so may be relevant.

The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during cylinder head gasket 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
Auxiliary battery terminal is disconnected/reconnected	Operate the multiplex network master switch assembly (retractable outer mirror switch) to extend and retract the outer rear view mirror assembly	Parking Support Brake System*	Refer to INITIALIZATION [09/2023 - ]
Replacement of throttle body with motor assembly Cleaning the deposits from the throttle body with motor assembly Replacement of camshaft (for intake or exhaust camshaft) Replacement of camshaft timing gear assembly Replacement of camshaft timing exhaust gear assembly Replacement of fuel (engine room side) pump assembly (for high pressure side) Replacement of ignition coil assembly Replacement of EGR valve assembly Gas leak from exhaust system is repaired Replacement of engine assembly Replacement of cylinder head sub-assembly Replacement of direct fuel injector assembly	Inspection After Repair	Poor idle, etc. Engine start function, etc.	Refer to INITIALIZATION [12/2023 - ]
Replacement of ECM	Perform Vehicle Identification Number (VIN) registration	DTC is output	Refer to REGISTRATION [12/2023 - ]
Replacement of ECM	Update ECU security key	Vehicle Control History (RoB) are stored	Refer to UPDATE ECU SECURITY KEY [09/2023 - ]
Replacement of hybrid motor control inverter assembly	ECU configuration	-	Refer to ECU CONFIGURATION [09/2023 - ]
Replacement of hybrid motor control inverter assembly	Front Resolver Correction value Registration Front Resolver Correction value Writing	DTCs are stored Slight vibration at a vehicle speed of 5 km/h (3 mph) or less Shock or vibration during acceleration	Refer to UTILITY [12/2023 - ]
Replacement of service plug grip	High voltage fuse accumulated load history reset	DTCs are stored	Refer to UTILITY [12/2023 - ]
Replacement of hybrid vehicle transaxle assembly	Front Resolver Correction value Writing	DTCs are stored Slight vibration at a vehicle speed of 5 km/h (3 mph) or less Shock or vibration during acceleration	Refer to UTILITY [12/2023 - ]
Suspension parts	Rear television camera assembly optical axis (Back camera position setting)	Parking Assist Monitor System	Refer to CALIBRATION [09/2023 - ]
	Parking assist ECU initialization	Panoramic View Monitor System	Refer to CALIBRATION [09/2023 - ]
	Parking assist ECU initialization	Advanced Park	Refer to CALIBRATION [09/2023 - ]
	w/ Automatic Headlight Beam Level Control System: Perform headlight ECU (headlight assembly LH) initialization	Lighting System (EXT)	Refer to INITIALIZATION [09/2023 - ]
Tires	Initialization12 Tire Position Identification12	Tire Pressure Warning System	Refer to Procedures Necessary When Replacing Parts (for Tire Pressure Warning System) table below Refer to WORK PROCEDURE [12/2023 - ]
	Rear television camera assembly optical axis (Back camera position setting)	Parking Assist Monitor System	Refer to CALIBRATION [09/2023 - ]
	Parking assist ECU initialization	Panoramic View Monitor System	Refer to CALIBRATION [09/2023 - ]
	Parking assist ECU initialization	Advanced Park	Refer to CALIBRATION [09/2023 - ]
Replacement of front bumper assembly*3	Front television camera view adjustment	Panoramic View Monitor System	Refer to CALIBRATION [09/2023 - ]
Replacement of front bumper assembly*3	Front television camera view adjustment	Advanced Park	Refer to CALIBRATION [09/2023 - ]
Front wheel alignment adjustment	Perform "Calibration"	DTCs are stored ABS warning light illuminates Brake system warning light (yellow indicator) illuminates Slip indicator light illuminates Electronically controlled brake system disabled or malfunctions	Refer to RESET MEMORY / CALIBRATION [09/2023 - ]

*: When "[Parking Support Brake System icon] System Stopped See Owner's Manual" is displayed on the multi-information display.

*1: Also necessary after performing a tire rotation.

*2: It is not necessary to perform this procedure if the tire pressure warning valve and transmitters are installed to the same location.

*3: Even when not replacing the part, it is necessary to perform the specified necessary procedures after installation.

NOTE:

To prevent the key from being locked in the vehicle, make sure to enter e-latch inspection mode and enable the manual release handle before disconnecting the cable from the negative (-) auxiliary battery terminal.

Refer to INSPECTION MODE PROCEDURE [09/2023 - ]

HINT:

When the cable is disconnected / reconnected to the auxiliary 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 Procedures are not Performed	Necessary Procedures	Link
Lighting System (w/ Automatic Headlight Beam Level Control System)	Drive the vehicle straight ahead at 15 km/h (10 mph) or more for 1 second or more.	Refer to INITIALIZATION [09/2023 - ]
Front Camera System
Adaptive High Beam System

LEARNING COMPLETES WHEN VEHICLE IS OPERATED NORMALLY

Effect/Inoperative Function When Necessary Procedures are not Performed	Necessary Procedures	Link
Power Back Door System	Reset back door close position	Refer to INITIALIZATION [09/2023 - ]
Air Conditioning System	After the ignition switch is turned to ON, the servo motor standard position is recognized.	-

COMPONENTS (REMOVAL)

Fig 1: Cylinder Head Gasket Removal Components (1 Of 16)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Procedure		Part Name Code
1	INSTALL ENGINE ASSEMBLY TO ENGINE STAND	-	See step 1	-	-
2	REMOVE ENGINE HANGERS	-	-	-	-
3	V-RIBBED BELT	16361A	See step 3	-	-
4	COMPRESSOR WITH MOTOR ASSEMBLY	88370	See step 4	-	-
5	HV WATER PUMP BRACKET	G9141F	-	-	-
6	NO. 1 COMPRESSOR MOUNTING BRACKET	88431	-	-	-
7	NO. 4 CYLINDER BLOCK INSULATOR	12584	-	-	-
8	NO. 5 CYLINDER BLOCK INSULATOR	12585	-	-	-

BRACKET

Fig 2: Cylinder Head Gasket Removal Components (2 Of 16)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Procedure		Part Name Code
9	DISCONNECT WATER BY-PASS HOSE	16261	-	-	-
10	NO. 2 WATER BY-PASS HOSE	16264	-	-	-
11	THROTTLE BODY WITH MOTOR ASSEMBLY	22030	See step 11	-	-
12	THROTTLE BODY GASKET	22271	-	-	-
13	NO. 2 WATER BY-PASS PIPE	16278	-	-	-
14	REMOVE WATER BY-PASS HOSE	16261	-	-	-
15	VENTILATION HOSE	12261	-	-	-
16	WATER BY-PASS HOSE SUB-ASSEMBLY	-	-	-	-
17	NO. 2 SURGE TANK STAY	17126	-	-	-
18	INTAKE AIR SURGE TANK ASSEMBLY	17190	See step 18	-	-
19	AIR SURGE TANK TO INTAKE MANIFOLD GASKET	17176	-	-	-

•

Non-reusable part

Fig 3: Cylinder Head Gasket Removal Components (3 Of 16)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Procedure		Part Name Code
20	NO. 1 FUEL HOSE	23801F	See step 20	-	-
21	WIRE HARNESS CLAMP BRACKET	-	-	-	-
22	REAR ENGINE MOUNTING STAY RH	12327	-	-	-
23	INTAKE MANIFOLD	17111	See step 23	-	-
24	NO. 1 INTAKE MANIFOLD TO HEAD GASKET	17177	-	-	-

•

Non-reusable part

Fig 4: Cylinder Head Gasket Removal Components (4 Of 16)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Procedure		Part Name Code
25	FUEL PUMP PROTECTOR	23214A	-	-	-
26	NO. 1 FUEL PIPE SUB-ASSEMBLY	23801P	See step 26	-	-
27	FUEL (ENGINE ROOM SIDE) PUMP ASSEMBLY	23100X	-	-	-
28	FUEL PUMP LIFTER ASSEMBLY	23470	-	-	-
29	FUEL PUMP SPACER GASKET	23224D	-	-	-

*1	FUEL PUMP LIFTER GUIDE	-	-
•	Non-reusable part	-	-

Fig 5: Cylinder Head Gasket Removal Components (5 Of 16)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Procedure		Part Name Code
30	NO. 1 ENGINE COVER	12611	-	-	-
31	VENTILATION HOSE	12261	-	-	-
32	NO. 2 VENTILATION HOSE	-	-	-	-
33	WIRE HARNESS CLAMP BRACKET	-	-	-	-
34	FUEL HOSE BRACKET	23881B	-	-	-
35	IGNITION COIL ASSEMBLY	19500	See step 35	-	-
36	ENGINE OIL LEVEL DIPSTICK GUIDE	11452	-	-	-

*1	ENGINE OIL LEVEL DIPSTICK	-	-
•	Non-reusable part	-	-

Fig 6: Cylinder Head Gasket Removal Components (6 Of 16)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Procedure		Part Name Code
37	DIRECT FUEL INJECTOR ASSEMBLY	23250E	-	-	-
38	SENSOR WIRE	82219A	-	-	-
39	WATER PUMP PULLEY	16173	See step 39	-	-

Fig 7: Cylinder Head Gasket Removal Components (7 Of 16)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Procedure		Part Name Code
40	CRANKSHAFT PULLEY	13471	See step 40	-	-
41	ENGINE MOUNTING BRACKET RH	12315A	-	-	-
42	WATER BY-PASS HOSE	16261	-	-	-
43	WATER INLET WITH THERMOSTAT SUB-ASSEMBLY	16031	-	-	-

*1	CRANKSHAFT PULLEY SET BOLT	*2	GASKET
•	Non-reusable part	-	-

Fig 8: Cylinder Head Gasket Removal Components (8 Of 16)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Procedure		Part Name Code
44	WATER HOSE CLAMP	16581	-	-	-
45	CRANKSHAFT POSITION SENSOR PROTECTOR	19312	-	-	-
46	SENSOR WIRE	82219C	-	-	-
47	DISCONNECT NO. 4 WATER BY-PASS HOSE	16281	-	-	-
48	DISCONNECT NO. 5 WATER BY-PASS HOSE	16282	-	-	-
49	OIL COOLER ASSEMBLY	15710	-	-	-
50	REMOVE NO. 4 WATER BY-PASS HOSE	16281	-	-	-
51	REMOVE NO. 5 WATER BY-PASS HOSE	16282	-	-	-
52	OIL COOLER PIPE	15767	-	-	-
53	WATER OUTLET	-	-	-	-

*1	NO. 1 CYLINDER BLOCK INSULATOR	*2	NO. 1 OIL COOLER BRACKET
*3	NO. 2 CYLINDER BLOCK INSULATOR	*4	NO. 3 CYLINDER BLOCK INSULATOR
•	Non-reusable part	-	-

Fig 9: Cylinder Head Gasket Removal Components (9 Of 16)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Procedure		Part Name Code
54	CAM TIMING OIL CONTROL SOLENOID ASSEMBLY (for Intake Side of Bank 1)	15370B	See step 54	-	-
55	CAM TIMING OIL CONTROL SOLENOID ASSEMBLY (for Exhaust Side of Bank 1)	15370B	See step 55	-	-
56	VVT SENSOR (for Intake Side of Bank 1)	11101E	See step 56	-	-
57	VVT SENSOR (for Exhaust Side of Bank 1)	11102A	See step 57	-	-
58	CYLINDER HEAD COVER SUB-ASSEMBLY	11201	-	-	-
59	SPARK PLUG TUBE GASKET	-	See step 59	-	-

*1	NO. 1 ENGINE COVER SUB-ASSEMBLY	-	-
•	Non-reusable part	*	Precoated part

Fig 10: Cylinder Head Gasket Removal Components (10 Of 16)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Procedure		Part Name Code
60	CAM TIMING OIL CONTROL SOLENOID ASSEMBLY (for Intake Side of Bank 2)	15370C	See step 60	-	-
61	CAM TIMING OIL CONTROL SOLENOID ASSEMBLY (for Exhaust Side of Bank 2)	15370C	See step 61	-	-
62	VVT SENSOR (for Intake Side of Bank 2)	11102A	See step 62	-	-
63	VVT SENSOR (for Exhaust Side of Bank 2)	11102A	See step 63	-	-
64	CYLINDER HEAD COVER SUB-ASSEMBLY LH	11202	-	-	-
65	SPARK PLUG TUBE GASKET	-	See step 65	-	-

*1	NO. 1 V-BANK COVER BRACKET	-	-
•	Non-reusable part	*	Precoated part

Fig 11: Cylinder Head Gasket Removal Components (11 Of 16)

Procedure		Part Name Code
66	NO. 2 OIL PAN SUB-ASSEMBLY	12102A	See step 66	-	-
67	OIL STRAINER SUB-ASSEMBLY	15104	-	-	-
68	OIL PAN SUB-ASSEMBLY	12101	See step 68	-	-

•

Non-reusable part

Fig 12: Cylinder Head Gasket Removal Components (12 Of 16)

Procedure		Part Name Code
69	TIMING CHAIN CASE OIL SEAL	11301C	See step 69	-	-
70	TIMING CHAIN COVER ASSEMBLY	11310	See step 70	-	-
71	SET NO. 1 CYLINDER TO TDC (COMPRESSION)	-	See step 71	-	-

•

Non-reusable part

Fig 13: Cylinder Head Gasket Removal Components (13 Of 16)

Procedure		Part Name Code
72	NO. 1 CHAIN TENSIONER ASSEMBLY	13540	See step 72	-	-
73	CHAIN TENSIONER SLIPPER	13559	-	-	-
74	CHAIN SUB-ASSEMBLY	13506	See step 74	-	-
75	NO. 1 CHAIN VIBRATION DAMPER	13561	-	-	-
76	NO. 2 CHAIN VIBRATION DAMPER	13562	-	-	-

Fig 14: Cylinder Head Gasket Removal Components (14 Of 16)

Procedure		Part Name Code
77	CAMSHAFT TIMING GEAR ASSEMBLY, CAMSHAFT TIMING EXHAUST GEAR ASSEMBLY AND NO. 2 CHAIN SUB-ASSEMBLY (for Bank 1)	-	See step 77	-	-
78	NO. 2 CHAIN TENSIONER ASSEMBLY	13550	-	-	-
79	CAMSHAFT BEARING CAP (for Bank 1)	-	See step 79	-	-
80	CAMSHAFT	13511	-	-	-
81	NO. 2 CAMSHAFT	13512	-	-	-
82	CAMSHAFT HOUSING SUB-ASSEMBLY RH	11103C	See step 82	-	-

*1	FUEL PUMP LIFTER HOUSING	*2	CAMSHAFT TIMING GEAR BOLT(for Intake Side of Bank 1)
*3	CAMSHAFT TIMING GEAR BOLT(for Exhaust Side of Bank 1)	*4	OIL CONTROL VALVE FILTER

Fig 15: Cylinder Head Gasket Removal Components (15 Of 16)

Procedure		Part Name Code
83	CAMSHAFT TIMING GEAR ASSEMBLY, CAMSHAFT TIMING EXHAUST GEAR ASSEMBLY AND NO. 2 CHAIN SUB-ASSEMBLY (for Bank 2)	-	See step 83	-	-
84	NO. 3 CHAIN TENSIONER ASSEMBLY	13560A	-	-	-
85	CAMSHAFT BEARING CAP (for Bank 2)	-	See step 85	-	-
86	NO. 3 CAMSHAFT SUB-ASSEMBLY	13053	-	-	-
87	NO. 4 CAMSHAFT SUB-ASSEMBLY	13054	-	-	-
88	CAMSHAFT HOUSING SUB-ASSEMBLY LH	11104A	See step 88	-	-

*1	CAMSHAFT TIMING GEAR BOLT(for Intake Side of Bank 2)	*2	CAMSHAFT TIMING GEAR BOLT(for Exhaust Side of Bank 2)
*3	OIL CONTROL VALVE FILTER	-	-

Fig 16: Cylinder Head Gasket Removal Components (16 Of 16)

Procedure		Part Name Code
89	NO. 1 VALVE ROCKER ARM SUB-ASSEMBLY	13801	See step 89	-	-
90	VALVE LASH ADJUSTER ASSEMBLY	13750	See step 90	-	-
91	VALVE STEM CAP	13716	See step 91	-	-
92	CYLINDER HEAD SUB-ASSEMBLY	11101	See step 92	-	-
93	CYLINDER HEAD GASKET	11115	-	-	-
94	CYLINDER HEAD LH	11102	See step 94	-	-
95	NO. 2 CYLINDER HEAD GASKET	11116	-	-	-
96	INSPECT CYLINDER HEAD SET BOLT	11101A	See step 96	-	-

*1	CYLINDER HEAD SET PLATE WASHER	*2	CYLINDER HEAD SET BOLT
•	Non-reusable part	-	-