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HOMESERVICE MANUALSTOYOTA2004CELICA GT, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 187 (ENGINE CONTROLS - SYSTEM & COMPONENT TESTING)FUEL SYSTEMSFUEL DELIVERYFUEL PUMP RESISTANCE & OPERATION
2004 Toyota Celica GT, Standard

Fuel Pump Resistance & Operation

2004 Toyota Celica GT, StandardSECTION Fuel Pump Resistance & Operation
WARNING: This page is about a different car, the 2003 Lexus GX 470. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: When testing fuel pump operation, DO NOT apply battery voltage to fuel pump for more than 10 seconds or fuel pump may be damaged. When testing fuel pump operation, keep fuel pump away from battery as far as possible.
  1. To test fuel pump resistance, use ohmmeter to check resistance between terminals. See Fig 1. Replace fuel pump and/or lead wire if resistance is not .2-3.0 ohms at 68°F (20°C).
  2. To test fuel pump operation, apply battery voltage to both terminals. DO NOT apply battery voltage to fuel pump for more than 10 seconds. Replace fuel pump if fuel pump does not operate.
Fig 1: Inspecting Fuel Pump Resistance
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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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