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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 P0113: Mass Airflow/Intake Air Temperature Sensor Circuit - High 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. Inspect MAF/IAT Sensor Connector For Poor Connection -  Turn ignition off. Disconnect MAF/IAT sensor 5-pin harness connector. Check for poor connection (such as damaged, pulled-out pins, corrosion). If malfunction is not present, go to next step. If any malfunctions are present, repair or replace terminal. After repair, go to step  9.
  4. Classify MAF/IAT Sensor Malfunction Or Harness Malfunction -  Connect WDS or equivalent to DLC-2. Access IAT PID. Connect fused jumper wire between MAF/IAT sensor 5-pin harness connector terminal "D" (Blue/Black wire) and terminal "E" (Brown wire). See Figure. Verify IAT PID value. If IAT PID voltage reading is 4.84 volts or more, go to next step. If IAT PID voltage reading is less than 4.84 volts, replace MAF/IAT sensor. After repair, go to step  9.
  5. Inspect MAF/IAT Sensor Signal Circuit For Short To Power -  Turn ignition on, engine off. Measure voltage between MAF/IAT sensor 5-pin harness connector terminal "D" (Blue/Black wire) and body ground. If battery voltage is not present, go to next step. If battery voltage is present, repair short circuit to power in Blue/black wire between MAF/IAT sensor 5-pin harness connector terminal "D" and PCM 30-pin harness connector terminal "2E" or replace wire harness. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. After repair, go to step  9.
  6. Inspect PCM Connector For Poor Connection -  Turn ignition off. Disconnect PCM connectors. Check PCM 30-pin harness connector terminal "2E" (Blue/Black wire) and terminal "2H" (Brown wire) for tightness using feeler tool. If malfunction is not present, go to next step. If any malfunction is present, repair terminal. After repair, go to step  9.
  7. Inspect MAF/IAT Sensor Signal Circuit For Open Circuit -  Check continuity of Blue/Black wire between MAF/IAT sensor terminal "D" and PCM 30-pin harness connector terminal "2E". If continuity is present, go to next step. If continuity is not present, repair open circuit in Blue/Black wire between MAF/IAT sensor terminal "D" and PCM 30-pin harness connector terminal "2E" or replace wire harness. After repair, go to step  9.
  8. Inspect MAF/IAT Sensor Ground Circuit For Open Circuit -  Check continuity of Brown wire between MAF/IAT sensor 5-pin harness connector terminal "E" and PCM 30-pin harness connector terminal "2H". If continuity is present, go to next step. If continuity is not present, repair for open circuit in Brown wire between MAF/IAT sensor 5-pin harness connector terminal "E" and PCM 30-pin harness connector terminal "2H" or replace wire harness. After repair, go to next step.
  9. Verify Trouble Shooting Of DTC P0113 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.
  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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