Engine Controls - System/component Tests - 3.4L: Overview Toyota Tacoma I

Fuel Pump Resistance & Operation

1. It may be necessary to lower fuel tank for access to electrical connector at fuel pump.
2. To test fuel pump resistance, use ohmmeter to check resistance between specified terminals on fuel pump electrical connector. (Scheme 90) Replace fuel pump if resistance is not.20-3.00 ohms at 68°F (20°C). 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.
3. To test fuel pump operation, apply battery voltage and ground to (+) and (-) terminals on electrical connector for fuel pump. (Scheme 90) DO NOT apply battery voltage to fuel pump for more than 10 seconds. Keep fuel pump away from battery as far as possible. Replace fuel pump if fuel pump does not to operate.

Scheme 90

See also:
• WIRING DIAGRAMS - 3.4L
• ADJUSTMENTS - 3.4L