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Home >> Suzuki >> 2001 >> Vitara JS, 4D Utility, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0103: Mass Air Flow (MAF) Sensor Circuit, High Input >> Diagnosis & Repair Procedure

Diagnosis & Repair Procedure

  1. Perform DTC CONFIRMATION TEST . If DTC P0103 is set, go to next step. If DTC P0103 is not set, problem is intermittent. System is okay at this time. See TROUBLE SHOOTING - NO CODES article.
  2. Turn ignition off. Connect scan tool. Start engine and allow it to reach normal operating temperature. Using scan tool, read MAF sensor values at idle and at 2500 RPM. See MAF SENSOR STANDARD VALUES  table. If MAF sensor values are not as specified, go to next step. If MAF sensor values are as specified, problem is intermittent. System is okay at this time. See TROUBLE SHOOTING - NO CODES article.
  3. Turn ignition on. Backprobing, measure voltage between PCM 26-pin connector C51-3 terminals No. 5 (Purple/Green wire) and No. 10 (Purple/White wire). See Figure. If reading is 1-1.6 volts, go to next step. If reading is not 1-1.6 volts, check for short to power in Purple/White wire between PCM 26-pin connector C51-3 and MAF sensor. Also check for open in Purple/Green wire between PCM 26-pin connector C51-3 and MAF sensor. See WIRING DIAGRAMS article. Repair as necessary and go to DTC CONFIRMATION TEST . If wires are okay, replace MAF sensor and go to DTC CONFIRMATION TEST .
  4. Start engine. Backprobing, measure voltage between PCM 26-pin connector C51-3 terminals No. 5 (Purple/Green wire) and No. 10 (Purple/White wire). If reading increases to 5 volts while engine speed is increased, replace PCM and go to DTC CONFIRMATION TEST . If reading does not increase to 5 volts while engine speed is increased, replace MAF sensor and go to DTC CONFIRMATION TEST .
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