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2003 Toyota Corolla S Sedan L4-1.8L (1ZZ-FE)
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Applicable Vehicles
^2003 - 2008 model year Corolla and Matrix vehicles equipped with the 1ZZ-FE engine.

Parts Information
Repair Procedure
1.Drain the engine coolant. Refer to TIS:
^2003 or 2004 model year Corolla Repair Manual, Engine/Hybrid System - Cooling - "Coolant: Replacement"
^2005 model year Corolla Repair Manual, Engine/Hybrid System - Cooling - "Engine Coolant (1ZZ-FE): Replacement"
^2006, 2007, or 2008 model year Corolla Repair Manual, Engine/Hybrid System - Cooling - "1ZZ-FE Cooling: Coolant: On-Vehicle Inspection"

2.Remove the air cleaner hose No.1.
A.Disconnect the VSV connector.
B.Remove the clamp of the engine wire.
C.Disconnect the fuel vapor feed hose No.1 from the VSV.
D.Disconnect the fuel vapor feed hose No.3 from the VSV.

E.Loosen the 2 hose clamp bolts, then remove the air cleaner hose No.1.
3.Remove the
intake manifold.
A.Remove the 2 clamps of the engine wire from the clamp bracket.

B.Disconnect the throttle control motor connector or accelerator cable (if equipped).

C.Disconnect the water bypass hose from the throttle body.
D.Disconnect the water bypass hose No.2 from the throttle body.

E.Disconnect the union to check valve hose from the
intake manifold.

F.Remove the 4 bolts, 2 nuts, and 2 clamp brackets.
G.Remove the
intake manifold and throttle body.
H.Remove the gasket from the
intake manifold.
4.Clean the mounting surface of the
intake manifold.
5.Install the
intake manifold.
A.Install a NEW gasket onto the
intake manifold.
B.Install the
intake manifold and throttle body assembly with the 2 brackets, 4 bolts, and 2 nuts. Uniformly tighten the bolts and nuts in several passes.
Torque: 30 N.m (306 kgf.cm, 22 ft.lbf)
C.Connect the union to check valve hose to the
intake manifold.
D.Connect the water bypass hose No. 2 to the throttle body.
E.Connect the water bypass hose to the throttle body.
F.Connect the throttle control motor connector.
G.Install the 2 clamps of the engine wire onto the clamp bracket.
6.Reinstall the air cleaner hose No.1.
A.Install the air cleaner hose No.1 with the 2 hose clamp bolts.
B.Connect the fuel vapor feed hose No.3 to the VSV.
C.Connect the fuel vapor feed hose No.1 to the VSV.
D.Install the clamp of the engine wire.
E.Connect the VSV connector.
7.Fill and check the engine coolant. Refer to TIS:
^2003 or 2004 model year Corolla Repair Manual, Engine/Hybrid System - Cooling - "Coolant: Replacement"
^2005 model year Corolla Repair Manual, Engine/Hybrid System - Cooling - "Engine Coolant (1ZZ-FE): Replacement"
^2006 or 2007 or 2008 model year Corolla Repair Manual, Engine/Hybrid System - Cooling - "1ZZ-FE Cooling: Coolant: On-Vehicle Inspection"
8.Clear the fuel trim values by disconnecting the negative (-) battery cable for 90 seconds.
9.Test drive the vehicle and confirm normal operation.