Attention! See precautions in subsection 6.3.1 before starting work.
Removing
1. Disconnect the negative battery cable.
2. Remove the air filter cover (see subsection 6.3.1.2).
3. Squeeze the mounting clips and disconnect the connectors from the throttle potentiometer, auxiliary air supply valve, air flow sensor and injector wires.
4. Also disconnect the connector for the heating element installed between the throttle body and the intake manifold.
5. Release pressure from the fuel system (see subsection 6.3.1.7).
6. Then release the mounting clamps and disconnect the fuel supply hose and the return pipe hose from the throttle body.
7. Disconnect the accelerator cable from the throttle cam on the throttle body, then unscrew the locknut and adjusting nut and remove the cable sheath from the mounting bracket.
8. On automatic transmission models, also disconnect the downshift cable.
9. Loosen the mounting clamps, then disconnect the cooling system hoses at the rear of the throttle body and plug the hose holes. Do this quickly to minimize coolant loss.
10. Remember or mark the installation position of all vacuum and vent hoses in order to connect them correctly when installing the throttle body, then loosen the mounting clamps (where installed) and disconnect the hoses from the throttle body.
11. Loosen and remove the mounting bolts securing the throttle body to the intake manifold and remove the throttle body from the vehicle.
12. Remove the heating element.
13. Plug the intake manifold opening with a clean rag to keep dirt or foreign matter out of the intake manifold.
14. If necessary, after removing the throttle body, unscrew the mounting screws and separate the upper and lower sections.
15. Remove the gasket installed between them.
Installation
1. Installation is carried out in the reverse order of removal.
2. When installing, pay attention to the following points.
3. If necessary, check that the mating surfaces of the upper and lower throttle body sections are clean and dry, then install a new gasket and assemble the sections by tightening the mounting screws securely.
4. Before installation, check that the mating surfaces of the throttle body, intake manifold and heating element are clean and even.
5. Install the throttle body and heater element to the intake manifold.
6. Tighten all mounting bolts diagonally to the required stage 1 torque, then tighten them to the required stage 2 torque.
7. Check that all hoses are correctly installed and, if necessary, secure them with mounting clamps.
8. After installation is complete, adjust the accelerator cable (see subsection 6.3.1.3).
9. On automatic transmission models, adjust the low gear cable (see subsection 9.2.4).