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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 P0107: Manifold Absolute Pressure Sensor Circuit - Low Input >> 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 MAP PID When MAP Sensor Connector Is Disconnected -  Disconnect MAP sensor 4-pin harness connector. If voltage reading is more than 4.9 volts, go to next step. If voltage reading is not more than 4.9 volts, go to step  5.
    4. NOTE: If DTC P0122 and P2228 are also retrieved with P0107, go to CONSTANT VOLTAGE  trouble shooting procedure under SYSTEM TESTS.
    Fig 1: Identifying MAP Sensor Circuits & Harness Connector Terminals
    G00221498Courtesy of MAZDA MOTORS CORP.
  4. Inspect Power Supply Circuit Voltage At Map Sensor Connector -  Turn ignition on, engine off. Measure voltage between MAP sensor 4-pin harness connector terminal "C" (Red/Black wire) and body ground. See Fig 1. Is voltage reading is 4.5-5.5 volts, check for poor connection of MAP sensor 4-pin harness connector terminal "C" (Red/Black wire). Repair or replace terminal if necessary. If okay, replace MAP sensor. After repair, go to step  7. If voltage reading is not 4.5-5.5 volts, check for open circuit in Red/Black wire between MAP sensor 4-pin harness connector terminal "C" and PCM 30-pin harness connector terminal "2K". Repair or replace suspected harness. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. After repair, go to step  7.
  5. Inspect MAP Sensor Signal Circuit For Short To Ground -  Turn ignition off. Disconnect PCM connectors. Check for continuity between MAP sensor 4-pin harness connector terminal "D" (Yellow/Black wire) and body ground. If continuity is not present, go to next step. If continuity is present, repair short circuit in Yellow/Black wire between MAP sensor 4-pin harness connector terminal "D" and PCM 30-pin harness connector terminal "1J" or replace suspected harness. After repair, go to step  7.
  6. Inspect MAP Sensor Signal & Ground Circuit For Short Each Other -  Check continuity between MAP sensor 4-pin harness connector terminal "D" (Yellow/Black wire) and terminal "A" (Brown wire). If continuity is not present, go to next step. If continuity is present, repair short between circuits. After repair, go to next step.
  7. Verify Trouble Shooting Of DTC P0107 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 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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