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Warm Dr3 - Air Intake Temperature Sensor

  1. Connect voltmeter negative lead to ground. Connect voltmeter positive lead to cavity No. 4 of 13-way ECU connector. Turn ignition switch to "RUN" position. On vehicles with ECU No. MD072035, voltmeter should indicate 0-1 volt. On vehicles with ECUs No. MD080152, MD082058 or MD082059, voltmeter should read 1-2 volts.
  2. If voltage is correct, proceed to WARM DR4. If voltage was not okay, unplug connector from air intake temperature sensor. Connect ohmmeter leads to terminals of sensor connector. Ohmmeter should read 100-1300 ohms. If resistance is incorrect, replace air intake temperature sensor. If resistance was okay, turn ignition switch off. Reconnect sensor connector. Disconnect 13-way connector. Connect ohmmeter leads to cavities No. 2 and 4.
    Fig 1: View of ECU Connector, WARM DR3 - Air Intake Temp. Sensor
    G14338Courtesy of CHRYSLER MOTORS.
  3. Ohmmeter should read 100-1300 ohms. If resistance is correct, replace ECU. If resistance is incorrect, repair open or shorted wires from sensor to ECU.
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