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Home >> Suzuki >> 1993 >> Sidekick JS, 4D Utility >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Fuel System >> Fuel Delivery >> Fuel Pump Circuit Test (Swift DOHC)

Fuel Pump Circuit Test (Swift DOHC)

  1. Turn ignition on. Operating sound of fuel pump should be heard for 3 seconds. If fuel pump operating sound is heard, fuel pump circuit is okay. If fuel pump operating sound is not heard, go to next step.
  2. Remove fuel pump relay with connector from main fuse box, located near battery. See Figure . With fuel pump relay connected, ensure voltage exists at White/Blue wire. If voltage does not exist, check EFI main relay. See RELAYS  under RELAYS & SOLENOIDS. With ignition on and engine off, install a jumper wire between fuel pump relay Pink and White/Blue wires. Fuel pump should activate.
  3. If fuel pump activates, go to next step. If fuel pump does not activate, check fuel pump relay connector for poor connection and fuel pump relay Pink wire for an open. If okay, check for faulty fuel pump. See BASIC TESTING article.
  4. If fuel pump activates when fuel pump relay is jumpered, check ignition fuse. If ignition fuse is okay, check for faulty fuel pump relay. See RELAYS  under RELAYS & SOLENOIDS. If fuel pump relay is okay, check for open or poor connection between ECM and fuel pump relay Pink/White wire. If wire is okay, substitute a known good ECM and retest.
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