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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 105 (ENGINE CONTROLS - SELF-DIAGNOSTICS)DIAGNOSTIC TESTSDTC P0110: INTAKE AIR TEMPERATURE (IAT) SENSOR CIRCUITCIRCUIT DESCRIPTION
2004 Toyota Matrix XR, FWD, Standard

Circuit Description

2004 Toyota Matrix XR, FWD, StandardSECTION Circuit Description
WARNING: This page is about a different car, the 2003 Lexus RX 300. However, it is still accessible from the selected car via links, so may be relevant.

The IAT sensor is a thermistor built into MAF sensor to monitor temperature of air flowing through MAF sensor. Based on IAT sensor signal, ECM increases fuel injection volume to improve driveability during cold engine operation. If DTC P0110 is set, ECM will operate in fail-safe mode, in which intake air temperature is assumed to be 68°F (20°C). DTC P0110 is set when ECM detects an open or short in IAT sensor circuit. Possible causes are:

  • Open or short in IAT sensor circuit.
  • Faulty IAT sensor.
  • Faulty ECM.

NOTE: If DTCs P0110, P0115 and P0120 are output together, inspect ECM terminal E2 (ground) circuit for an open. Repair as necessary. See ENGINE PERFORMANCE in WIRING DIAGRAMS article in ELECTRICAL.
RENDER: 1.0x

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