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CHARGING SYSTEM, Diagnostic DTC:P0516, P0517

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DTC Code DTC Name
P0516 Battery Temperature Sensor Circuit Low
P0517 Battery Temperature Sensor Circuit High
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DESCRIPTION

The battery thermometer sensor installed on the battery current sensor assembly detects battery temperature.

A thermistor is integrated into the battery thermometer sensor, and the resistance in the battery thermometer sensor changes according to the battery temperature.

The resistance of the thermistor in the battery thermometer sensor decreases as the battery temperature increases. The resistance increases as the temperature decreases.

The battery thermometer sensor is connected to the ECM. The ECM supplies 5 V from the THB terminal to the battery thermometer sensor through resistor R.

The battery thermometer sensor and resistor R are connected in series. This results in fluctuations in the voltage supplied from the THB terminal when the resistance changes according to the battery temperature.

The ECM determines the battery temperature according to fluctuations in voltage. When the battery temperature is high, the ECM determines to reduce the amount of current supplied from the generator in order to protect the battery.

DTC No. DTC Detection Condition Trouble Area
P0516

Battery thermometer sensor output value is 0.2 V or less for 0.5 seconds or more with the engine switch on (IG)

(1 trip detection logic)

  • Battery current sensor assembly (battery thermometer sensor)

  • Short in battery thermometer sensor circuit

  • ECM
P0517

Battery thermometer sensor output value is 4.8 V or more for 0.5 seconds or more with the engine switch on (IG)

(1 trip detection logic)

  • Battery current sensor assembly (battery thermometer sensor)

  • Open in battery thermometer sensor circuit

  • ECM
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WIRING DIAGRAM

Refer to DTC P1550 (Click here).

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INSPECTION PROCEDURE

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PROCEDURE


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    INSPECT BATTERY CURRENT SENSOR ASSEMBLY


    1. A01CG3BE20

      Disconnect the cable from the negative (-) battery terminal.

    2. Disconnect the battery current sensor assembly connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (THB) - 4 (E2) 20 to 30°C (68 to 86°F) 1.5 to 2.5 kΩ
      Table 1. Text in Illustration
      *1

      Component without harness connected

      (Battery Current Sensor Assembly)

    4. Reconnect the cable to the negative (-) battery terminal.


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    CHECK HARNESS AND CONNECTOR (BATTERY CURRENT SENSOR ASSEMBLY - ECM)


    1. Disconnect the ECM connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      A2-1 (THB) - D41-120 (THB) Always Below 1 Ω
      A2-4 (E2) - D41-92 (EIB) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      A2-1 (THB) or D41-120 (THB) - Body ground Always 10 kΩ or higher

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    REPLACE BATTERY CURRENT SENSOR ASSEMBLYClick here

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    REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY CURRENT SENSOR ASSEMBLY - ECM)

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    REPLACE ECMClick here