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Home >> Mazda >> 1997 >> MPV ES, 3.0 3 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Circuit Tests >> DTC P1455 - Fuel Tank Level, Open Or Short Circuit >> Diagnosis & Repair Procedure

Diagnosis & Repair Procedure

  1. Inspect all applicable harness connectors. Repair as needed. Turn ignition on. Access ECM harness connector. ECM is mounted to passenger floor, behind glove box. Using voltmeter, backprobe applicable ECM harness connector. Measure voltage between ground and terminal No. 2L.
  2. Voltage should be about 0-.4 volts when fuel tank is full and 2-4.9 volts when tank is low. If voltage is within specification, go to step 5). If voltage is not within specification, go to next step.
  3. Turn ignition off. Disconnect fuel pump connector. Check continuity of Yellow wire between terminal "B" on fuel gauge sending unit harness connector and terminal No. 2L on ECM harness connector. Repair as needed. If continuity exists, go to next step.
  4. Inspect fuel gauge and fuel gauge sending unit. See appropriate INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT section. Repair or replace as needed. If both components are okay, go to next step.
  5. Erase DTC. See CLEARING CODES  . If DTC is present, replace ECM. If DTC is not present, intermittent poor harness connection may have caused DTC to originally set.
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