On-Vehicle Inspection

1. Disconnect the MAF meter connector.
2. Disconnect the VSV hose for CCV.
3. Remove the 3 bolts and air cleaner assembly, air cleaner inlet, MAF meter together in one piece.

Check the each injectors for operation sound.

1. With the engine running or cranking, use a sound scope to check that there is normal operating noise in proportion to the engine speed.
Fig 1: Using Sound Scope To Check For Normal Operating Noise
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. If you have no sound scope, you can check it by feeling the injector operating vibration with your finger.

If no sound or unusual sound is heard, check the wiring connector, injector or injection signal from the ECM.

1. Disconnect the injector connector.
2. Using an ohmmeter, measure the resistance between the terminals.

   Resistance: 11.6 to 12.4 Ω at 20°C (68°F) 

   Fig 2: Measuring Resistance Between Terminals Using Ohmmeter

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   If the resistance is not as specified, replace the injector.

3. Reconnect the injector connector.