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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 P2228: BARO Sensor Circuit - Low Input >> Diagnostic Procedures

Diagnostic Procedures

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. Inspect Connection Of BARO Sensor Connector -  Turn ignition off. Verify BARO sensor 3-pin harness connector is connected securely. If connector connection is okay, go to next step. If connector is loose, reconnect connector securely. After repair, go to step  9.
  4. Inspect BARO Sensor Connector For Poor Connection -  Disconnect BARO sensor 3-pin harness connector. Inspect for poor connection (such as damaged, pulled-out pins, corrosion). If malfunction is not present, go to next step. If malfunction is present, repair or replace terminal. After repair, go to step  9.
  5. Inspect BARO Sensor Malfunction -  Perform BARO Sensor Inspection. Refer to BAROMETRIC PRESSURE SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - MAZDA6, MIATA, MPV, PROTEGE & PROTEGE5 article. If BARO sensor is okay, go to next step. If BARO sensor is faulty, replace BARO sensor. After repair, go to step  9.
    6. NOTE: If DTCs P0107 and P0122 are also retrieved with P2228, go to CONSTANT VOLTAGE  troubleshooting procedure under SYSTEM TESTS.
    Fig 1: Identifying BARO Sensor Circuits & Harness Connector Terminals
    G00221527Courtesy of MAZDA MOTORS CORP.
  6. Inspect Power Supply Circuit Voltage At BARO Sensor Connector -  Measure voltage between BARO sensor 3-pin harness connector terminal "C" (Red/Black wire) and body ground. See Fig 1. If voltage reading is 4.5-5.5 volts, go to next step. If voltage reading is not 4.5-5.5 volts, check for open circuit in Red/Black wire between BARO sensor 3-pin harness connector terminal "C" and PCM 30-pin harness connector terminal "2K". See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. Repair or replace wire harness as necessary. After repair, go to step  9.

  7. Inspect BARO Sensor Signal Circuit For Short To Ground

    Turn ignition off. Disconnect PCM harness connectors. Check for continuity between BARO sensor 3-pin harness connector terminal "B" (Brown wire) and body ground. If continuity is not present, go to next step. If continuity is present, repair short circuit to ground in Brown wire between BARO sensor 3-pin harness connector terminal "B" and PCM 30-pin harness connector terminal "2H" or replace wire harness. After repair, go to step  9.

  8. Inspect PCM Connector For Poor Connection

    Disconnect PCM harness connectors. Inspect for poor connection at PCM 30-pin harness connector terminal "2H" (such as damaged, pulled-out pins, corrosion). If malfunction is not present, go to next step. If malfunction is present, repair or replace terminal. After repair, go to next step.

  9. Verify Trouble Shooting Of DTC P2228 Is Completed

    Make sure to reconnect all disconnected connectors. Clear DTC from PCM memory using WDS or equivalent. Turn ignition off. Start engine and warm up completely. If same DTC is not present, go to next step. If 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.

  10. 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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