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Home >> Suzuki >> 1999 >> Vitara JS, 4D Utility, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0111: Intake Air Temperature (IAT) Circuit Range/Performance Problem

DTC P0111: Intake Air Temperature (IAT) Circuit Range/Performance Problem

  1. Turn ignition off. Disconnect IAT sensor harness connector. Check for poor connections and repair as necessary. If connections are okay, check operation of IAT sensor. See SYSTEM & COMPONENT TESTINGS article. Replace if necessary. If IAT sensor is okay, go to next step.
  2. Disconnect PCM harness connectors. Check for poor connections and repair as necessary. If connections are okay, check Light Blue and Black/White wires for excessive resistance between IAT sensor and PCM. Repair as necessary. If circuits are okay, replace PCM and retest system.
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