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Home >> Suzuki >> 2001 >> Grand Vitara JLS+, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0102: Mass Air Flow (MAF) Sensor Circuit, Low Input >> Diagnosis & Repair Procedure
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Diagnosis & Repair Procedure

  1. Perform DTC CONFIRMATION TEST . If DTC P0102 is set, go to next step. If DTC P0102 is not set, problem is intermittent. System is okay at this time. See TROUBLE SHOOTING - NO CODES article.
  2. Turn ignition off. Disconnect MAF sensor connector. Turn ignition on. Measure voltage between ground and MAF sensor harness connector terminal No. 3 (Blue/Black wire). If reading is 10-14 volts, go to next step. If reading is not 10-14 volts, check for short or open in Blue/Black wire between MAF sensor and main relay. See WIRING DIAGRAMS article. Repair as necessary and go to DTC CONFIRMATION TEST .
  3. Turn ignition off. Reconnect MAF sensor connector. Turn ignition on. Backprobing, measure voltage between PCM 26-pin connector C51-3 terminals No. 21 (Gray/Yellow wire) and No. 23 (Purple/White wire). See Figure. If reading is not .5-1.0 volt, go to next step. If reading is .5-1.0 volt, disconnect PCM 26-pin connector C51-3 . Check for poor terminal contact at PCM 26-pin connector C51-3 . If poor terminal contact is found, repair as necessary and go to DTC CONFIRMATION TEST . If terminal contact is okay, replace PCM and go to DTC CONFIRMATION TEST .
  4. Check for open or short in Purple/White wire between PCM 26-pin connector C51-3 and MAF sensor. Repair as necessary and go to DTC CONFIRMATION TEST . See WIRING DIAGRAMS article. If wire is okay, disconnect MAF sensor connector. Check for poor terminal contact at MAF sensor connector . If poor terminal contact is found, repair as necessary and go to DTC CONFIRMATION TEST . If terminal contact is okay, replace MAF sensor and go to DTC CONFIRMATION TEST .
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