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Home >> Suzuki >> 2012 >> Equator Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 41 (Fuel System) >> Diagnostic Information and Procedures >> Fuel Pump Electrical Circuit Diagnosis >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2007 Suzuki XL7. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, the fuel pump should not be operating.
    • if the fuel pump operates continuously, test for a short to voltage in supply voltage circuit of the fuel pump. If the circuit/connections test normal, replace the fuel pump relay.
  2. Test the fuel pump fuse. The fuse should not be open.
    • if the fuel pump fuse is open, test for a short to ground in the supply voltage circuit of the fuel pump. If the circuit/connections test normal, replace the fuel pump.
  3. Ignition OFF, remove the fuel pump relay from the electrical center.
  4. Ignition ON, test for battery voltage between the B+ voltage circuit of the fuel pump relay and ground.
    • if less than B+, repair the B+ voltage circuit of the fuel pump relay for an open/high resistance.
  5. Connect a 15-amp fused jumper wire between the B+ circuit of the fuel pump relay and the supply voltage circuit of the fuel pump. The fuel pump should operate.
    • if the fuel pump does not operate, test for the following conditions:
      • An open/high resistance in the supply voltage circuit of the fuel pump
      • An open/high resistance in the ground circuit of the fuel pump
    • if the above circuit/connections test normal, replace the fuel pump.
  6. If all circuit/connections test normal, test or replace the fuel pump relay.
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