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Test TC-151A - Fuel Level Unit No Change Over Miles

NOTE: For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article in this section.
  1. Ensure fuel tank is 1/4 full. Using scan tool, read and note fuel level sending unit voltage. If voltage is less than 0.2 volt, perform TEST TC-149A . If voltage is more than 4.7 volts, perform TEST TC-150A . If voltage is not 2.5-4.7 volts, go to step 5). If voltage is 2.5-4.7 volts, go to next step.
  2. Add 5 gallons of fuel to fuel tank. Using scan tool, read fuel level sending unit voltage. If voltage does not decrease by at least 0.2 volt, replace fuel pump module and perform TEST VER-2A. If voltage decreases by at least 0.2 volt, go to next step.
  3. Condition required to set DTC is not present at this time. FUEL LEVEL UNIT NO CHANGE OVER MILES DTC sets if Powertrain Control Module (PCM) does not sense fuel level signal circuit voltage change a calibrated amount over a calculated number of miles. Possible causes are: open sensor signal circuit, defective fuel level sending unit, defective PCM, or defective connections or wiring. Go to next step.
  4. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-2A . If wiring and connectors are okay, test is complete. Perform TEST VER-2A.
  5. Condition required to set DTC is not present at this time. FUEL LEVEL UNIT NO CHANGE OVER MILES DTC sets if Powertrain Control Module (PCM) does not sense fuel level signal circuit voltage change a calibrated amount over a calculated number of miles. Possible causes are: open sensor signal circuit, defective fuel level sending unit, defective PCM, or defective connections or wiring. Go to next step.
  6. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-2A . If wiring and connectors are okay, test is complete. Perform TEST VER-2A.
NOTE: A break in test sequence occurs at this point. Sequence skips from TEST TC-151A to TEST TC-153A. No tests have been omitted.
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