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Engine Controls - Tests W/codes - 3.9L: Adjustments Dodge Dakota WS

Testing & Diagnostics ~333 words

TEST NTC-4A - CHECKING COOLANT SENSOR CALIBRATION

  1. Start engine. Using DRB, read Engine Coolant Temperature (ECT) sensor value. If ECT sensor temperature is more than 180°F (82°C), stop engine. Allow engine coolant to cool to 150°F (66°C). Start engine. Allow engine to reach normal operating temperature of 180°F (82°C). If ECT sensor value does not increase smoothly, repair cooling system as necessary and replace ECT sensor. Perform «TEST VER-2»(ref-10889-S40837604532000111000000) . If ECT sensor value increases smoothly, go to next step.
  2. If ECT sensor value did not reach 180°F (82°C) or more, repair cooling system as necessary and replace ECT sensor. Perform TEST VER-2. If ECT sensor value reached 180°F (82°C) or more, system is functioning properly. Test is complete.

TEST NTC-5A - CHECKING TPS CALIBRATION

  1. Turn engine off. Turn ignition on. Using DRB, read Throttle Position Sensor (TPS) voltage. Ensure throttle is fully closed and against throttle stop. If voltage is not 1.5 volts or less with throttle closed, replace TPS. Perform «TEST VER-2»(ref-10889-S40837604532000111000000) .
  2. If voltage is 1.5 volts or less with throttle closed, monitor voltage while slowly opening throttle wide open. If voltage change is not smooth, replace TPS. Perform TEST VER-2. If voltage change is smooth, go to next step.
  3. If maximum voltage is not at least 3.4 volts at wide open throttle, replace TPS. Perform TEST VER-2. If maximum voltage is at least 3.4 volts at wide open throttle, TPS is functioning properly. Test is complete.

TEST NTC-6A - CHECKING MAP SENSOR CALIBRATION

  1. Turn engine off. Install vacuum "T" in Manifold Absolute Pressure (MAP) sensor vacuum hose. Install vacuum gauge. Start engine, and let it idle. If engine will not idle, maintain a constant RPM above idle.
  2. Using DRB, read MAP sensor value. If reading is within one in. Hg of vacuum gauge reading, MAP sensor is functioning properly. Test is complete. If reading is not within one in. Hg of vacuum gauge reading, replace MAP sensor. Perform «TEST VER-2»(ref-10889-S40837604532000111000000) .

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