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Home >> Mazda >> 2002 >> Tribute LX, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 60 (Engine Controls [Self-Diagnostics 2.3L]) >> Diagnostic Tests >> DTC P0125: Excessive Time To Enter Closed Loop >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
  1. If FREEZE FRAME DATA has been recorded, go to next step. If FREEZE FRAME DATA has not been recorded, record FREEZE FRAME DATA. Go to next step.
  2. Verify Related Repair Information Availability -  Check for related Service Bulletins and/or on-line repair information availability. If any related repair information is available, perform repair or diagnosis according to available repair information. If vehicle is not repaired, go to next step. If related repair information is not available, go to next step.
  3. Verify Current Input Signal Status - Is Concern Intermittent Or Constant?-  Start engine. Warm up engine completely. Access ECT PID using WDS or equivalent. If ECT PID is not more than 140°F (60°C), go to next step. If ECT PID is more than 140°F (60°C), intermittent concern exists. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES article.
  4. Inspect ECT Sensor Connector For Poor Connection -  Turn ignition off. Disconnect ECT sensor 2-pin harness connector. Inspect for poor connection (such as damaged, pulled-out pins, corrosion). If malfunctions are not present, go to next step. If malfunctions are present, repair or replace terminal. After repair, go to step  7.
  5. Inspect ECT Sensor -  Inspect ECT sensor. Refer to ENGINE COOLANT TEMPERATURE SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - MAZDA6, MIATA, MPV, PROTEGE & PROTEGE5 article. If ECT sensor is okay, go to next step. If ECT sensor is faulty, replace ECT sensor. After repair, go to step  7.
  6. Inspect PCM Connector For Poor Connection -  Disconnect PCM 27-pin harness connector. Inspect for poor connection (such as damaged, pulled-out terminals, corrosion). If malfunction is present, repair or replace terminal. After repair, go to next step. If malfunction is not present, go to next step.
  7. Verify Trouble Shooting Of DTC P0125 Is Completed -  Make sure to reconnect all disconnected connectors. Clear DTC from PCM memory using WDS or equivalent. Turn ignition on, engine off. Access ECT PID using WDS or equivalent. Wait until ECT PID is less than 140°F (60°C). Start engine and warm it up completely. If PENDING CODE of same DTC is not present, go to next step. If PENDING CODE of same DTC is present, replace PCM. For PCM removal and installation, see POWERTRAIN CONTROL MODULE under COMPUTERIZED ENGINE CONTROLS in REMOVAL & INSTALLATION article. After repair, go to next step.
  8. Verify After Repair Procedure -  Using scan tool, perform After Repair Procedure. See AFTER REPAIR PROCEDURE . If any DTCs are present, go to appropriate DTC inspection. Refer to DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no DTCs are present, trouble shooting is complete.
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