CHARGING SYSTEM, Diagnostic DTC:P0516, P0517

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

DESCRIPTION

The battery temperature sensor detects the battery temperature. The battery current sensor assembly has a built-in thermistor with a resistance that changes in response to changes in the battery temperature. When the battery temperature is low the thermistor resistance increases, and when the temperature is high the resistance decreases. The battery temperature sensor is connected to the power management control ECU. A 5 V power supply voltage is supplied to the battery temperature sensor from terminal THB of the power management control ECU via resistor R. As resistor R and the battery temperature sensor are connected in series, when the resistance changes in response to changes in the battery temperature, the electric potential at terminal THB also changes. Based on this signal, the power management control ECU protects the battery by reducing the charge current when the battery temperature is high.

A00EAZQE01
DTC Code DTC Detection Condition Trouble Area
P0516 When the ignition switch is ON, the battery temperature sensor output is 0.2 V or less for 0.5 seconds or more (1 trip detection logic).
  • Battery current sensor assembly

  • Power management control ECU

  • Harness or connector

P0517 When the ignition switch is ON, the battery temperature sensor output is 4.8 V or higher for 0.5 seconds or more (1 trip detection logic).
  • Battery current sensor assembly

  • Power management control ECU

  • Harness or connector

WIRING DIAGRAM

A00E96LE06

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK BATTERY CURRENT SENSOR ASSEMBLY


    1. A00EBA6E10
      Text in Illustration
      *1

      Component without harness connected

      (Battery Current Sensor Assembly)

      Disconnect the B38 battery current sensor connector.

    2. 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 3 to 10 kΩ
      Result
      Result Proceed to
      OK w/ Entry and Start System A
      w/o Entry and Start System B
      NG C

    B
    C
    A
  2. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BATTERY CURRENT SENSOR)

    w/ Entry and Start System:


    1. A00EATLE07
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to Power Management Control ECU)

      *2

      Front view of wire harness connector

      (to Battery Current Sensor)

      Disconnect the D113 power management control ECU connector.

    2. Disconnect the B38 battery current sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D113-23 (VC) - B38-2 (VC5) Always Below 1 Ω
      D113-25 (E2) - B38-4 (E2)
      D113-28 (THB) - B38-1 (THB)
      D113-23 (VC) - Body ground Always 10 kΩ or higher
      D113-25 (E2) - Body ground
      D113-28 (THB) - Body ground

    NG
    OK
  3. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BATTERY CURRENT SENSOR)

    w/o Entry and Start System:


    1. A00E7SOE07
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to Power Management Control ECU)

      *2

      Front view of wire harness connector

      (to Battery Current Sensor)

      Disconnect the D112 power management control ECU connector.

    2. Disconnect the B38 battery current sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D112-12 (VC) - B38-2 (VC5) Always Below 1 Ω
      D112-18 (E2) - B38-4 (E2)
      D112-15 (THB) - B38-1 (THB)
      D112-12 (VC) - Body ground Always 10 kΩ or higher
      D112-18 (E2) - Body ground
      D112-15 (THB) - Body ground

    NG
    OK