On-Vehicle Inspection

REMOVE ENGINE COVER
Remove 4 nuts and engine cover.
INSPECT INJECTOR OPERATION
Check operation sound from each injector.
1. With the engine running or cranking, use a sound scope to check that there is normal operating noise in proportion to engine speed.
  
  Fig 1: Checking Operation Sound From Each Injector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. If you have no sound scope, you can check the injector transmission operation with a screwdriver.
If no sound or an unusual sound is heard, check the wiring connector, injector or injection signal from the ECM.

Fig 2: Checking Injector Transmission Operation With Screwdriver
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT INJECTOR RESISTANCE

Fig 3: Inspecting Injector Resistance
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the injector connectors.
2. Using an ohmmeter, measure the resistance between the terminals.
  1. Resistance: 13.4 - 14.2Ω at 20°C (68°F)
  If the resistance is not as specified, replace the injector.
3. Reconnect the injector connectors.
REINSTALL ENGINE COVER
Install the engine cover with the 4 nuts.