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  • P0516 Low Voltage At The Battery Temperature Sensor

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    Mopar1973Man

    P0516 LOW VOLTAGE AT THE BATTTERY TEMP SENSOR

    When Monitored and Set Condition:

    When Monitored: With the ignition on and battery voltage greater than 10.4 volts.
    Set Condition: The circuit voltage to the ECM falls below a calibrated threshold for a certain period of time.

    POSSIBLE CAUSES

    • BATTERY TEMP SENSOR
    • (K118) SIGNAL CIRCUIT SHORTED TO GROUND
    • (K118) SIGNAL CIRCUIT SHORTED
    • INTERMITTENT CONDITION
    • ECM

    DIAGNOSTIC PROCEDURE

    1. Turn the ignition off. Disconnect the Battery temp sensor harness connector. Check connectors - Clean/repair as necessary. Measure the resistance of the Battery temp sensor. Is the resistance between 300 and 90k ohms?
      Yes --> Go To 2
      No --> Replace the battery temp sensor. Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).
    2. Disconnect the ECM harness connectors. Check connectors - Clean/repair as necessary. Measure the resistance between the engine ground and the temperature sensor (K118) signal circuit at the sensor connector. Is the resistance more than 100 k ohms?
      Yes --> Go To 3
      No --> Repair the Battery temp sensor (K118) signal circuit shorted to ground. Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).
    3. Measure the resistance between the Battery temp sensor (K118) signal circuit and all other circuits in the ECM harness connector of the engine harness. Is the resistance more than 100k ohms?
      Yes --> Go To 4
      No --> Repair the (K118) signal circuit shorted to another circuit. Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).
    4. Reconnect the disconnected Battery temp sensor harness connector. While monitoring with DRBIII®, disconnect the temperature sensor harness connector. Did P0517 set?
      Yes --> Refer to the SYMPTOM: INTERMITTENT CONDITION. Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).
      No --> Replace the ECM. Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).

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