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Home >> Suzuki >> 2004 >> Vitara RWD, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 4 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P0103: Mass Airflow Sensor Circuit - High Frequency >> Diagnostic Procedure
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Diagnostic Procedure

WARNING: This page is about a different car, the 2002 Isuzu Trooper. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform ON-BOARD DIAGNOSTIC II SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. After performing OBD-II system check, go to next step.
  2. Turn ignition on. Review and record FAILURE RECORDS data on scan tool. Operate vehicle within FAILURE RECORDS conditions. On scan tool, monitor DTC information. If scan tool indicates DTC P0103 FAILED THIS IGNITION, go to next step. If scan tool display is not as indicated, check for an intermittent problem. See DIAGNOSTIC AIDS .
  3. Start engine and allow it to reach normal operating temperature. With engine at idle, monitor MAF FREQUENCY parameter on scan tool. If display is 3-7 grams/sec. or more, go to next step. If display is less than 3-7 grams/sec., go to step  7.
  4. Turn ignition off. Disconnect Mass Airflow (MAF) sensor 3-pin harness connector. MAF sensor is located in air intake pipe, at air cleaner housing. Start engine and let idle. Using scan tool, monitor MAF FREQUENCY parameter. If display is zero grams/sec., go to next step. If display is not zero grams/sec., go to step  6.
  5. Replace MAF sensor. Retest system. If DTC P0103 resets, replace and reprogram PCM. See EEPROM PROGRAMMING PROCEDURE  under PROGRAMMING. If DTC P0103 does not reset, repair is complete. After repair, use scan tool to verify repair
  6. Check MAF sensor harness for incorrect routing near high voltage components (solenoids, relays or motors). If no problem with harness routing is found, go to next step. If problem with harness routing is found, repair as necessary. After repair is complete, see VERIFYING VEHICLE REPAIR  under SELF-DIAGNOSTIC SYSTEM.
  7. Replace and reprogram PCM. See POWERTRAIN CONTROL MODULE REPLACEMENT  under POWERTRAIN CONTROL MODULE. Use scan tool to clear DTC and verify repair.
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