Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

2004 Toyota PriusFACTORY OEM SERVICE PROCEDURE

Fuel System: Inspection

INSPECT FUEL INJECTOR ASSY

Inspect the resistance.

Using an ohmmeter, measure the resistance between the terminals.

Standard:

FUEL INJECTOR ASSY RESISTANCE STANDARD (1 OF 2)

Tester Connection	Specified Condition
1 - 2	13.45 to 14.15 Ω at 21 °C (68°F)

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

Fig 1: Measuring Resistance Between Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Inspect the injection volume.
NOTE:
- Perform the test in a well-ventilated area and watch out for flames.
- Carefully handle the fuel tube connector.
1. Prepare a new fuel tube.
  HINT:
  
  Part No. 23901-21080
2. Using a cutter knife, cut off the protector of the fuel tube as illustrated. Tear off the protector by hand, then remove the fuel tube connector.
  
  Fig 2: Cutting Protector Of Fuel Tube Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.