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Home >> Suzuki >> 2002 >> Esteem GL, 4D Sedan, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 1.8L >> Diagnostic Tests >> DTC P0453: EVAP System Pressure Sensor - High Input >> Diagnosis & Repair Procedure
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Diagnosis & Repair Procedure

  1. If engine system check has been performed, go to next step. If engine system check has not been performed, go to A4: ENGINE SYSTEM CHECK  under SYSTEM TESTS.
  2. Turn ignition off. Disconnect FTP sensor 3-pin harness connector. FTP sensor is located on top of fuel tank. Turn ignition on. Measure voltage between ground and FTP sensor harness connector terminal No. 3 (Pink/Green wire). See Figure . Voltage should be 4-6 volts. If voltage is as specified, leave harness connector disconnected and go to step  4 . If voltage is not as specified, go to next step.
  3. Check for open or short to ground in Pink/Green wire between FTP sensor and ECM. See WIRING DIAGRAMS article. If problem is found, repair as necessary. After repair, repeat DTC CONFIRMATION TEST  .
  4. Turn ignition off. Disconnect ECM 34-pin harness connector E92. ECM is located under instrument panel, behind glove box. See Figure . Measure voltage between ground and ECM harness connector E92 terminal No. 33 (Red/Yellow wire). If voltage is 5 volts or more, go to next step. If voltage is not as specified, go to step  6 .
  5. Repair short to voltage in Red/Yellow wire between ECM and FTP sensor. After repair, repeat DTC CONFIRMATION TEST  .
  6. Check FTP sensor operation. See FUEL TANK PRESSURE SENSOR under EMISSION SYSTEMS & SUB-SYSTEMS in SYSTEM & COMPONENT TESTING article. If problem is found, replace FTP sensor. After repair, repeat DTC CONFIRMATION TEST  . If no problem is found, go to next step.
  7. Substitute a known good ECM, and repeat DTC CONFIRMATION TEST  . If DTC does not reset, testing is complete.
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