CHARGING SYSTEM, Diagnostic DTC:P0516, P0517

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

DESCRIPTION

A004KZKE03
*a Resistance (kΩ)

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

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

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

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

The battery temperature 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

  • Engine speed is 500 r/min or more, battery voltage is 10.9 V or more, and 1 second or more have elapsed after starting.

  • Battery temperature sensor output is less than 0.104 V, and duration of the malfunction is 0.5 seconds or more (1-trip detection logic).

  • Battery current sensor assembly (battery temperature sensor)

  • Short to GND in battery temperature sensor circuit

  • ECM
P0517

  • Engine speed is 500 r/min or more, battery voltage is 10.9 V or more, and 1 second or more have elapsed after starting.

  • Battery temperature sensor output is more than 4.867 V, and duration of the malfunction is 0.5 seconds or more (1-trip detection logic).

  • Battery current sensor assembly (battery temperature sensor)

  • Open in battery temperature sensor circuit

  • ECM

WIRING DIAGRAM

A004KM8E05
*a Current Sensor
*b Temperature Sensor
*c BATTERY CURRENT SENSOR ASSEMBLY

PROCEDURE


  1. INSPECT BATTERY CURRENT SENSOR ASSEMBLY


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

    2. A004JWOE05
      Text in Illustration
      *a

      Component without harness connected

      (Battery Current Sensor Assembly)

      Disconnect the A11 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
      2 (THB) - 3 (GND) 20 to 30°C (68 to 86°F) 1.5 to 2.6 kΩ

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


    NG

    REPLACE BATTERY CURRENT SENSOR ASSEMBLY Click here

    OK

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


    1. Disconnect the A33 and A35 ECM connectors.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      A33-24 (THB) - A11-2 (THB) Always Below 1 Ω
      A35-30 (EPA2) - A11-3 (GND) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      A33-24 (THB) or A11-2 (THB) - Body ground Always 10 kΩ or higher
      A35-30 (EPA2) or A11-3 (GND) - Body ground Always 10 kΩ or higher

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR