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Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 98 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P0110, DTC P0112 Or DTC P0113 >> Diagnosis & Repair

Diagnosis & Repair

WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
  1. If DTC P0113 is set, go to step  3 and check for an open in intake air temperature sensor circuit for .5 second. If DTC P0112 is set, go to step  5 and check for a short in intake air temperature sensor circuit for .5 second. If P0110 is set, check for open or short in intake air temperature sensor circuit for 0.5 second. Go to next step.
  2. Connect scan tool to Data Link Connector (DLC) No. 3. See Figure. Turn ignition on. Turn scan tool on. Using scan tool, monitor IAT sensor temperature. If temperature displayed is same as actual intake air temperature, check IAT sensor and ECM connections. Problem is intermittent. If temperature displayed is -40°F (-40°C), go to next step. If temperature displayed is 284°F (140°C) or more, go to step  5.
  3. Turn ignition off. Disconnect MAF sensor connector. Connect a fused jumper wire between terminals No. 4 and No. 5 at MAF sensor harness connector. See Fig 1. Turn ignition on. Using scan tool, monitor IAT sensor temperature. If temperature displayed is 284°F (140°C) or more, check MAF sensor connector for corrosion, damage or loose terminals. If connector is okay, replace MAF sensor and retest. If temperature displayed is less than 284°F (140°C), go to next step.
    Fig 1: Checking Jumper Wire At Mass Airflow Sensor Harness Connector
    G00165111Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Turn ignition off. Remove fused jumper wire. Backprobing connector, connect a fused jumper wire between terminals THA and ETHA at ECM connector. See Fig 2. If temperature displayed on scan tool is 284°F (140°C) or more, check for an open in wire between MAF sensor harness connector and ECM connector. If temperature displayed on scan tool is not 284°F (140°C) or more, replace ECM and retest.
    Fig 2: Connecting Jumper Wires Between Terminals THA & ETHA Of ECM
    G00165112Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. Turn ignition off. Disconnect MAF sensor connector. See Fig 3. Turn ignition on. If temperature displayed on scan tool is -40°F (-40°C), replace MAF sensor and retest. If temperature displayed is not -40°F (-40°C), turn ignition off and go to next step.
    Fig 3: Disconnecting Intake Air Temperature Sensor
    G00165113Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. Disconnect E4 connector from ECM. See Fig 4. Turn ignition on. If temperature displayed on scan tool is -40°F (-40°C), locate and repair short in Black/Blue or Black/Yellow wire between MAF sensor and ECM E4 connector. If temperature displayed on scan tool is not -40°F (-40°C), replace ECM and retest.
    Fig 4: Disconnecting ECM Connector E4
    G00165114Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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