CHARGING SYSTEM, Diagnostic DTC:P0516, P0517

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

DESCRIPTION

A019ON3E02

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 power management control ECU. 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 power management control ECU determines the battery temperature according to fluctuations in voltage. When the battery temperature is high, the power management control ECU 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

  • Power management control ECU
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

  • Power management control ECU

WIRING DIAGRAM

Refer to DTC P1550 Click here.

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT BATTERY CURRENT SENSOR ASSEMBLY


    1. A019PFHE01
      Text in Illustration
      *1

      Component without harness connected

      (Battery Current Sensor Assembly)

      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
      2 (VC5) - 4 (E2) Always 0.1 to 10 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 - POWER MANAGEMENT CONTROL ECU)


    1. Disconnect the power management control ECU connector.

      A019O44E01

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      A64-1 (THB) - F7-28 (THB) Always Below 1 Ω
      A64-2 (VC5) - F7-23 (VC) Always Below 1 Ω
      A64-4 (E2) - F7-25 (E2) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      A64-1 (THB) or F7-28 (THB) - Body ground Always 10 kΩ or higher
      A64-2 (VC5) or F7-23 (VC) - Body ground Always 10 kΩ or higher
      A64-4 (E2) or F7-25 (E2) - Body ground Always 10 kΩ or higher
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Battery Current Sensor Assembly)

      		 *2

      Front view of wire harness connector

      (to Power Management Control ECU)

    3. Reconnect the power management control ECU connector.

    4. Reconnect the battery current sensor assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here