Toyota 22030-0H031
Throttle Body

The removal process of throttle body assembly from 2AZ-FE engine control system starts with draining engine coolant. The first step is to eliminate the No. 1 engine cover sub-assembly through the removal of 2 nuts. The procedure begins by disconnecting the mass air flow meter connector followed by wire harness separation and disconnection of the No. 1 vacuum switching valve. Next is ventilation hose removal and separation of the No. 2 fuel vapor feed hose. The technician should loosen the No. 1 air cleaner hose clamp and unlock the air cleaner assembly clamp before removing the air cleaner filter element. The procedure for removing the throttle body assembly begins by taking out the No. 2 fuel vapor feed hose followed by the No. 1 water by-pass hose then the No. 2 water by-pass hose followed by disconnection of the connector then the throttle hose. Disconnect the 4 bolts to remove the fuel pipe support combined with throttle body assembly and pull off the gasket from the intake manifold.

Draining engine coolant should be the first step before starting the throttle body assembly removal process from the 2AZ-FE engine control system. The first step includes removing the No. 1 engine cover sub-assembly by unfastening its two nuts. You must start by detaching the air cleaner cap sub-assembly together with the No. 1 air cleaner hose through steps which include disconnecting the mass air flow meter connector, separating the wire harness, disconnecting the No. 1 vacuum switching valve, and removing the ventilation hose and separating the No. 2 fuel vapor feed hose, loosening the No. 1 air cleaner hose clamp, unlocking the air cleaner assembly clamp and finally removing the air cleaner filter element. Deliver the throttle body assembly by disconnecting the No. 2 fuel vapor feed hose followed by the No. 1 water by-pass hose and the No. 2 water by-pass hose and connector and throttle hose. Experts must remove the 4 bolts and pull out the fuel pipe support before they can extract the throttle body assembly from which they substitute the intake manifold gasket.

Turn the ignition switch to the ON position without operating the accelerator pedal; if the pedal is operated, repeat the previous steps.

Attach it with 2 bolts.

Remove the wire harness clamp, fuel tube from the clamp, and the 4 bolts to take out the fuel pipe support and throttle body, followed by removing the gasket from the intake manifold.

Disconnect the No. 2 fuel vapor feed hose, the No. 1 water by-pass hose, the No. 2 water by-pass hose, the connector, and the throttle hose.

Disconnect the water by-pass hose, the No. 2 water by-pass hose, and the No. 1 throttle body hose.

Disconnect the cable from the negative battery terminal and wait at least 90 seconds to prevent airbag and seat belt pretensioner activation.

Remove the No. 1 engine cover sub-assembly.

Lock the No. 1 air cleaner hose clamp and disconnect the No. 1 air cleaner hose from the throttle body.

Connect the purge line hose, water by-pass hose, No. 2 water by-pass hose, and No. 1 throttle body hose.

Add engine coolant and inspect for any coolant leaks.

Install the air cleaner inlet assembly, add engine coolant, check for engine coolant leaks, and install the No. 1 engine cover sub-assembly.

Install the No. 1 engine cover sub-assembly.

Remove the two bolts and two nuts to take off the throttle body assembly.

Lock the No. 1 air cleaner hose clamp and disconnect the No. 1 air cleaner hose from the throttle body, unfasten the 2 hook clamps, and remove the air cleaner cap along with the air cleaner filter element from the air cleaner case.

First, drain the engine coolant.

Connect the mass air flow meter connector.

Remove the 4 bolts to take off the fuel pipe support and throttle body, and remove the gasket from the intake manifold.

Add engine coolant and check for any engine coolant leaks.

Remove the air cleaner cap along with the air cleaner hose.