OEM 2006 Scion tC Throttle Body

2006 Scion tC Throttle Body Parts Q&A

• Q: How to service and repair the throttle body on 2006 Scion tC?

  A: The service and repair work on throttle bodies begins with draining engine coolant followed by disconnection of the negative battery terminal cable and maintenance of a 90-second wait before proceeding. Start repairs by first unscrewing the 2 engine cover nuts and then disconnecting power wires from the mass air flow meter and purge VSV while you detach the wire harness clamp and disassemble the No. 2 ventilation hose, purge line hoses from throttle body and purge VSV, also remove the No. 1 air cleaner hose. To obtain access to the air cleaner assembly disconnect two hook clamps which then allows removal of the air cleaner cap followed by taking out the air cleaner filter element. To access the throttle body first disconnect the water by-pass hoses as well as the No. 1 throttle body hose and throttle position sensor and control motor connector and afterward remove the wire harness clamp and fuel tube from its place. Begin the procedure by removing the 4 bolts from the fuel pipe support and throttle body whereafter removing the gasket on the intake manifold. Apply a new gasket to the intake manifold before securing the throttle body and fuel pipe clamp through 4 bolts tightened at 30 N.m (305 kgf.cm, 22 in.lbf). At the same time, insert the fuel tube into the clamp and install the wire harness clamp. At the correct angle position the paint mark and hose clamp during connection of the throttle position sensor and control motor connector and the No. 1 throttle body hose and the No. 2 water by-pass hose. Perform the same process for connecting the by-pass hose to its manifold. Place the air cleaner filter element with proper orientation onto the air cleaner case before inserting the hinge part of the air cleaner cap while hanging the two hook clamps. The alignment of the match marks on the No. 1 air cleaner hose and throttle body must be accomplished before the hose is connected and the No. 1 air cleaner clamp is unfastened to maintain proper hose clamp positioning. The purge VSV with its hose should connect to the throttle body along with the purge line hose. At the same time the No. 2 ventilation hose must link to the cylinder head cover while maintaining correct positioning for all paint marks and hose clamps. Mount the wire harness clamp then link both the purge VSV connector and the mass air flow meter connector. The cable connections to the negative battery terminal should be reestablished followed by engine coolant addition while confirming no coolant escape occurs. After installation of the engine cover the final step involves torquing the 2 nuts to 7.0 N.m (71 kgf.cm, 62 in.lbf) while specific systems need initialization after battery terminal removal.