CHARGING SYSTEM(w/o Stop And Start System), Diagnostic DTC:P0516, P0517

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

DESCRIPTION

A004ARGE08
*a Resistance (kΩ)

The battery temperature sensor built into 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. Detection Item DTC Detection Condition Trouble Area Warning Indicate Memory
P0516 Battery Temperature Sensor Circuit Low

Battery temperature sensor output value is less than 0.2 V for 0.5 seconds or more with the ignition switch ON

(1 trip detection logic)

  • Battery current sensor assembly (battery temperature sensor)

  • Wire harness or connector

  • ECM

 Charge warning light does not come on DTC stored
P0517 Battery Temperature Sensor Circuit High

Battery temperature sensor output value is higher than 4.8 V for 0.5 seconds or more with the ignition switch ON

(1 trip detection logic)

  • Battery current sensor assembly (battery temperature sensor)

  • Wire harness or connector

  • ECM

 Charge warning light does not come on DTC stored

WIRING DIAGRAM

A0047N4E01

CAUTION / NOTICE / HINT

Note

Before replacing the ECM, refer to Service Bulletin.

PROCEDURE


  1. INSPECT BATTERY CURRENT SENSOR ASSEMBLY


    1. Inspect the battery current sensor assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE BATTERY CURRENT SENSOR ASSEMBLY Click here

    OK

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


    1. Disconnect the B112 ECM connector (for LHD).

    2. Disconnect the B118 ECM connector (for RHD).

    3. Disconnect the A31 battery current sensor assembly connector.

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

      for LHD
      Tester Connection Condition Specified Condition
      B112-87 (THB) - A31-1 (THB) Always Below 1 Ω
      B112-118 (EIB) - A31-4 (E2) Always Below 1 Ω
      B112-117 (VCIB) - A31-2 (VC5) Always Below 1 Ω
      B112-87 (THB) or A31-1 (THB) - Body ground Always 10 kΩ or higher
      B112-118 (EIB) or A31-4 (E2) - Body ground Always 10 kΩ or higher
      B112-117 (VCIB) or A31-2 (VC5) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      B118-87 (THB) - A31-1 (THB) Always Below 1 Ω
      B118-118 (EIB) - A31-4 (E2) Always Below 1 Ω
      B118-117 (VCIB) - A31-2 (VC5) Always Below 1 Ω
      B118-87 (THB) or A31-1 (THB) - Body ground Always 10 kΩ or higher
      B118-118 (EIB) or A31-4 (E2) - Body ground Always 10 kΩ or higher
      B118-117 (VCIB) or A31-2 (VC5) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR