CHARGING SYSTEM, Diagnostic DTC:P0516, P0517

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

DESCRIPTION

A01CC0JE01

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

Battery temperature 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 temperature sensor)

  • Short in battery temperature sensor circuit

  • ECM
P0517

Battery temperature 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 temperature sensor)

  • Open in battery temperature sensor circuit

  • ECM

WIRING DIAGRAM

Refer to DTC P1550 Click here.

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT BATTERY CURRENT SENSOR ASSEMBLY


    1. A01CG3BE03

      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 36°F) 1.3 to 3.0 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 ECM connector.

      A01CDS5E01

    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) - D1-103 (THB) Always Below 1 Ω
      A2-4 (E2) - D1-101 (EIB) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      A2-1 (THB) or D1-103 (THB) - Body ground Always 10 kΩ or higher

    NG

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

    OK

    REPLACE ECM Click here