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.

2008 Lexus IS FFACTORY OEM SERVICE PROCEDURE

Fuel Pump: Inspection

INSPECT FUEL PUMP ASSEMBLY
1. Inspect the resistance of the fuel pump assembly
  1. Using an ohmmeter, measure the resistance between terminals 1 and 2
    Standard resistance: 0.2 to 3.0 Ω at 20°C (68°F)
    
    If the result is not as specified, replace the fuel pump assembly.
    
    Fig 1: Identifying Fuel Pump Assembly Terminals
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Inspect the operation of the fuel pump assembly.
  1. Connect a battery positive (+) lead to terminal 1 of the connector, and a negative (-) lead to terminal 2. Check that the fuel pump assembly operates.
    NOTE:
    These tests must be performed within 10 seconds to prevent the coil from burning out.
    
    Keep the fuel pump assembly as far away from the battery as possible.
    
    Always turn the voltage on and off on the battery side, not on the fuel pump assembly side.

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready Tools Compare Repair Quote Quote Shield Pro

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.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty

Get a Free Quote

No obligation. See pricing before you book.