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Home >> Dodge and Ram >> 2003 >> Durango Base, 5.9 Z, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 15 (Engine Controls - Self Diagnostics - 4.7L) >> Diagnostic Tests >> DTC P0116: Engine Coolant Temperature Circuit Performance >> Testing

DTC P0116: Engine Coolant Temperature Circuit Performance: Testing

WARNING: This page is about a different car, the 2003 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition on, engine not running. With the DRBIII® scan tool, read DTCs and record the related freeze frame data. Is the Good Trip Counter displayed and equal to zero? If yes, go to next step. If no, see INTERMITTENT CONDITION  under SELF-DIAGNOSTIC SYSTEM.
  2. Turn the ignition off. Disconnect the PCM harness connectors. Disconnect the ECT sensor harness connector. Visually inspect both the component and the PCM connectors. Look for damaged, partially broken wires, and backed out or corroded terminals. Ignition on, engine not running. Measure the voltage on the (K2) ECT signal circuit in the ECT sensor harness connector. Is the voltage above 5.2 volts? If yes, repair the short to voltage in the (K2) ECT signal circuit. If no, go to next step.
  3. Turn the ignition off. Connect the PCM harness connector. Ignition on, engine not running. With the DRBIII® scan tool, read the ECT voltage. Is the voltage above 4.6 volts? If yes, go to next step. If no, go to step  7.
  4. Connect a jumper wire between the (K2) ECT signal circuit and the (K4) sensor ground circuit in the ECT sensor harness connector. With the DRBIII® scan tool, read the ECT sensor voltage. Is the voltage below 1.0 volt? If yes, replace the ECT sensor. If no, go to next step.
    5. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool (8815) to perform diagnosis.
  5. Turn the ignition off. Disconnect the PCM harness connectors. Measure the resistance of the (K2) ECT signal circuit from the ECT sensor harness connector to the appropriate terminal of Miller Special Tool (8815). Is the resistance below 5.0 ohms? If yes, go to next step. If no, repair the open in the (K2) ECT signal circuit.
    6. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool (8815) to perform diagnosis.
  6. Measure the resistance of the (K4) sensor ground circuit from the ECT sensor harness connector to the appropriate terminal of Miller Special Tool (8815). Is the resistance below 5.0 ohms? If yes, go to step  9. If no, repair the open in the (K4) sensor ground circuit.
  7. Turn the ignition off. Disconnect the PCM harness connectors. Measure the resistance between ground and the (K2) ECT signal circuit in the ECT sensor harness connector. Is the resistance below 100 ohms? If yes, repair the short to ground in the (K2) ECT signal circuit. If no, go to next step.
  8. Measure the resistance between the (K2) ECT sensor signal circuit and the (K4) sensor ground circuit at the ECT sensor harness connector. Is the resistance below 5.0 ohms? If yes, repair the (K4) sensor ground shorted to the (K2) ECT sensor signal circuit. If no, go to next step.
    9. NOTE: Before continuing, disconnect the PCM harness connectors and check the related wiring terminals for corrosion, damage or terminal push out. Repair as necessary.
  9. Using the wiring diagram as a guide, inspect the wire harness and connectors. Pay particular attention to all power and ground circuits. If there are no possible causes remaining, replace and program the PCM. See PROGRAMMING .
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