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Home >> Mazda >> 2000 >> Protege ES, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 1.8L >> Diagnostic Trouble Code Tests >> DTC P0452: EVAP System, Pressure Sensor Low Input >> Diagnosis & Repair Procedure

Diagnosis & Repair Procedure

  1. Ensure FREEZE FRAME PID data has been recorded. Check service bulletins. Go to next step.
  2. Using scan tool, access PID/DATA MONITOR. Start engine. Record PID data for FTP V. If data is less than .2 volt, go to next step. If data is more than .2 volt, problem is intermittent (not current).
  3. Disconnect FTP sensor connector. If PID data for FTP V is more than 4.8 volts, go to next step. If FTP V is 4.8 volts or less, go to step  6 .
    NOTE: If DTC P0107 and P0122 are present, check reference voltage. See REFERENCE VOLTAGE TEST  .
  4. Turn ignition off. Disconnect fuel tank pressure sensor connector. Turn ignition on. Measure voltage between ground and terminal "C" (Pink/Blue wire) on harness connector. If 4.5-5.5 volts is not present, go to next step. If 4.5-5.5 volts is present, check harness connector and FTP sensor terminal "C". Clean or repair as necessary. If no problem is found, replace fuel tank pressure sensor. Go to step  8 .
  5. Disconnect X-13 harness connector, located in front of fuel tank. Check voltage at X-13 female harness connector terminal "A" (Pink/Black wire). If voltage is present, check continuity of Pink/Blue wire between X-13 male harness connector terminal "A" and FTP sensor terminal "C". Repair as necessary. If no voltage is present, check continuity of Pink/Black wire between X-13 female harness connector terminal "A" and PCM terminal No. 90. Repair as necessary. After all repairs, go to step  8 .
  6. Turn ignition off. Check continuity between X-13 male harness connector terminal "C" (Red wire) and ground. If continuity is not present, go to next step. If continuity is present, repair short to ground on Red wire between X-13 connector and FTP sensor terminal "B". Go to step  8 .
  7. Disconnect PCM connector. Check continuity of Red/Black wire between X-13 female harness connector terminal "C" and PCM harness connector terminal No. 62. If continuity is present, repair short to ground on Red/Black wire. Go to next step. If continuity is not present, check for short between signal (Red wire and Red/Black wire) and ground (Brown wire and Orange wire) circuits. Repair as necessary and go to next step.
  8. Turn ignition on. Erase DTC. See CLEARING CODES in SELF-DIAGNOSTICS - INTRODUCTION - MIATA, MILLENIA, MPV & PROTEGE article. Start engine. Using scan tool, access PID/DATA MONITOR. Check PID data for FTP V. FTP V should be .2-4.8 volts. Check for DTCs. If same DTC is pending, replace PCM. If DTC is not pending, go to next step.
  9. Reconnect all connectors. Erase DTC. See CLEARING CODES in SELF-DIAGNOSTICS - INTRODUCTION - MIATA, MILLENIA, MPV & PROTEGE article. If any DTC is present, go to appropriate test. If no DTC is present, test is complete.
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