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Home >> Suzuki >> 2007 >> XL7 Base, FWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrumentation/Driver Info./Horn >> Diagnostic Information and Procedures >> Fuel Gauge Inaccurate or Inoperative >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the fuel level sensors. Install a signal generator and instrument panel tester between the signal circuit and the low reference circuit.
  2. Ignition ON, vary the resistance on the signal generator from 40 to 250 ohms. Verify that the scan tool Fuel Tank Level Remaining parameter displays the correct fuel level percent.
    • If the fuel level percent is incorrect, test the signal circuit and the low reference circuit for an open/high resistance. If the circuits test normal, replace the ECM.
  3. Ignition ON, vary the resistance on the signal generator from 40 to 250 ohms and monitor the fuel gauge.
    • If the gauge is incorrect, replace the IPC.
  4. If all circuits test normal, test or replace the fuel level sensors.
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