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Home >> Suzuki >> 2001 >> Esteem GL, 4D Sedan, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - Esteem 1.8L >> Diagnostic Tests >> DTC P0112: Low Intake Air Temperature Sensor Circuit Input >> Diagnosis & Repair Procedure
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Diagnosis & Repair Procedure

  1. Perform DTC CONFIRMATION TEST  . If DTC P0112 is set, go to next step. If DTC P0112 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. Turn ignition on. Using scan tool, select IAT parameter. If display reads 401°F (205°F), go to next step. If display does not read 401°F (205°F), problem is intermittent. System is okay at this time. See TROUBLE SHOOTING - NO CODES article.
  3. Turn ignition off. Disconnect IAT sensor connector. Turn ignition on. Using scan tool, select IAT parameter. If display reads -40°F (-40°C), replace IAT sensor and go to DTC CONFIRMATION TEST  . If display does not read -40°F (-40°C), check for short to ground in Gray/Red wire between IAT sensor and ECM 28-pin connector C20 terminal No. 16. See Figure . If wiring is okay, replace ECM and go to DTC CONFIRMATION TEST  .
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