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.

2003 Lexus SC 430FACTORY OEM SERVICE PROCEDURE

Fuel System: Inspection

WARNING: This page is about a different car, the 2004 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT FUEL INJECTOR ASSY
1. Inspect the injector resistance.
  Using an ohmmeter, measure the resistance between the terminals.
  
  Standard: 13.4 to 14.2 at 20 C (68 F)
  
  HINT:
  
  If the resistance is not as specified, replace the injector.
  
  Fig 1: Identifying Fuel Injector And SST
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Inspect the injector injection.
  CAUTION: Keep injector clear of sparks during the test.

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.