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Home >> Mazda >> 2002 >> Tribute LX, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 27 (Engine Controls - Self-Diagnostics - 2.5L) >> Diagnostic Tests >> DTC P0452: EVAP Control System Fuel Tank Pressure Sensor Low Input >> Diagnosis & Repair Procedure

Diagnosis & Repair Procedure

WARNING: This page is about a different car, the 2002 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform DTC confirmation procedure. See DTC CONFIRMATION PROCEDURE  under SELF-DIAGNOSTIC SYSTEM. Check for DTCs during KOEO and KOER self-test. See RETRIEVING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. If DTC P0452 is present, go to next step. If DTC P0452 is not present, problem is intermittent. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES article.
  2. Turn ignition off. Disconnect FTP sensor connector. Turn ignition on. Using scan tool, select FTP V PID data. If FTP V PID voltage is more than 4.8 volts, go to next step. If FTP V PID voltage is 4.8 volts or less, go to step  5 .
    3. NOTE: If DTC P0107 and P0122 are also present, check reference voltage. See REFERENCE VOLTAGE TEST  .
  3. Measure voltage between FTP sensor harness connector terminal "C" (Gray/Red wire) and ground. If 4.5-5.5 volts is present, check for poor FTP sensor connector connection. Repair as necessary. If connector connection is okay, replace FTP and go to step  7 . If 4.5-5.5 volts is not present, go to next step.
  4. Turn ignition off. Disconnect in-line 16-pin connector located at back of joint box. See Fig 1 . Turn ignition on. Measure voltage between in-line 16-pin male connector terminal "E" (Gray/Red wire) and ground. See Fig 2 . If 4.5-5.5 volts is present, repair open in Gray/Red wire between in-line 16-pin male connector terminal "E" and FTP sensor harness connector terminal "C". See WIRING DIAGRAMS article. Go to step  7 . If 4.5-5.5 volts is not present, repair open in Gray/Red wire between in-line 16-pin male connector terminal "E" and PCM harness connector terminal No. 90. See Figure . See WIRING DIAGRAMS article. Go to step  7 .
  5. Turn ignition off. Check for continuity between in-line 16-pin female connector terminal "C" (Pink/Green wire) and ground. See Fig 2 . If continuity is not present, go to next step. If continuity is present, repair short to ground in Pink/Green wire between in-line 16-pin female connector and FTP sensor. See WIRING DIAGRAMS article. Go to step  7 .
  6. Turn ignition off. Check for continuity between in-line 16-pin male connector terminal "C" (Pink/Green wire) and ground. See Fig 2 . If continuity is not present, check for short between ground circuits and Pink/Green wire. See WIRING DIAGRAMS article. Go to next step. If continuity is present, repair short to ground in Pink/Green wire between in-line 16-pin male connector and PCM. See WIRING DIAGRAMS article. Go to next step.
  7. Reconnect all connections. Turn ignition on. Clear DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. Perform DTC confirmation procedure. See DTC CONFIRMATION PROCEDURE  under SELF-DIAGNOSTIC SYSTEM. Check for DTCs during KOEO and KOER self-test. If DTC P0452 is present, replace PCM and go to next step. See REMOVAL, OVERHAUL & INSTALLATION article. On vehicles equipped with immobilizer system, reprogram ignition key identification numbers. See COMPUTER RELEARN PROCEDURES - IMPORT article in GENERAL INFORMATION. If DTC P0452 is not present, go to next step.
  8. Perform DTC confirmation procedure. See DTC CONFIRMATION PROCEDURE  under SELF-DIAGNOSTIC SYSTEM. Check for DTCs. See RETRIEVING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. If any other DTC is present, go to appropriate test.
Fig 1: Identifying In-Line 16-Pin Connector Location
G00032507Courtesy of MAZDA MOTORS CORP.
Fig 2: Identifying In-Line 16-Pin Connector Terminals
G00020982Courtesy of MAZDA MOTORS CORP.
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