DTC P0113: IAT SENSOR CIRCUIT HIGH INPUT Isuzu Amigo II

Note. For circuit reference (Схема №3)

Circuit Description

Intake Air Temperature (IAT) sensor is a thermistor, which varies resistance based on temperature. As temperature of sensor increases, resistance decreases. Low temperature will result in a high signal voltage. DTC will set when PCM senses IAT sensor voltage is greater than 5 volts.

Conditions required to set DTC are

1. Engine running for more than 4 minutes.
2. Vehicle speed is less than 20 MPH.
3. MAF value is less than 20 grams per second.
4. ECT signal temperature is greater than 140°F (60°C).
5. IAT signal voltage indicates an intake air temperature less than -38°F (-39°C) for 12.5 seconds over a 25-second period.

Diagnostic Aids

Check for faulty connections or damaged harness. Ensure harness is not routed too close to high voltage wires, such as spark plug cables. If connections and harness appear okay, observe IAT display on scan tool while moving all related harnesses and connectors. A change in scan tool display indicates fault location. Check for skewed IAT sensor. See IAT SENSOR RESISTANCE under DTC P0112.