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Home >> Dodge and Ram >> 2003 >> Durango Base, 5.9 Z, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 17 (Engine Controls - Self-Diagnostics - 3.9L & 5.9L) >> Diagnostic Tests >> DTC P0071: Ambient/Battery Temp Sensor Performance >> Testing

DTC P0071: Ambient/Battery Temp Sensor 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. Turn ignition on, with engine off. With the DRBIII(R) scan tool, read DTCs and record the related freeze frame data. Is the good trip counter 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 battery temperature sensor harness connector. Turn ignition on, with engine off. Measure the voltage on the (K118) battery temperature signal circuit at the sensor connector. Is the voltage more than 5.2 volts? If yes, repair the short to voltage on the (K118) battery temperature sensor circuit. If no, go to next step.
  3. With the DRBIII(R) scan tool, read the battery temperature sensor voltage with the battery temperature sensor still disconnected. Is the voltage more than 4.6 volts? If yes, go to next step. If no, go to step  7 .
  4. Connect a jumper wire between the (K118) battery temperature signal circuit and the (K4) sensor ground circuit at the sensor harness connector. With the DRBIII(R) scan tool, read the battery temperature sensor voltage. Is the voltage less than 1.0 volt? Remove the jumper wire before continuing. If yes, replace the battery temperature sensor. If no, go to next step.
  5. Turn the ignition off. Connect the battery temperature sensor harness connector. Ensure the voltmeter leads meet the terminals in the connector and that there is good terminal to wire connection. Ensure the voltmeter leads are connected for positive polarity backprobe the (K118) battery temperature sensor signal circuit at the sensor harness connector and the PCM harness connector with both voltmeter leads. Start the engine. Allow the engine to idle. Is the voltage less than 0.10 of a volt? If yes, go to next step. If no, repair the excessive resistance in the (K118) battery temperature sensor signal circuit.
  6. Turn the ignition off. Ensure the voltmeter leads meet the terminals in the connector and that there is good terminal to wire connection. Ensure the voltmeter leads are connected for positive polarity backprobe the (K4) sensor ground circuit at the battery temperature sensor harness connector and the PCM harness connector using both volt meter leads. Start the engine. Allow the engine to idle. Is the voltage less than 0.10 of a volt? If yes, go to step  8 . If no, repair the excessive resistance in the (K4) sensor ground circuit.
  7. Turn the ignition off. Disconnect the battery temperature sensor harness connector. Disconnect the PCM harness connectors. Measure the resistance between ground and the (K118) battery temperature signal circuit. Is the resistance less than 100 ohms? If yes, repair the short to ground in the (K118) battery temperature signal circuit. If no, go to next step.
    8. NOTE: Before continuing, disconnect the PCM harness connectors and check the related wiring terminals for corrosion, damage or terminal push out. Repair as necessary.
  8. Using the wiring diagram as a guide, inspect the wire harness and connectors. Visually inspect the related wire harness. Look for any chafed, pierced, pinched, or partially broken wires. Visually inspect both the component and the PCM 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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