CHARGING SYSTEM, Diagnostic DTC:P0516 and P0517

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

DESCRIPTION

A110648E04

The battery thermometer sensor detects the battery temperature.

The battery current sensor 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 thermometer sensor is connected to the ECM.

A power supply voltage of 5 V is supplied to the battery temperature sensor from terminal THB of the ECM via resistor R.

As resistor R and the battery thermometer 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 ECM protects the battery by reducing the charge current when the battery temperature is high.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P0516

Battery Temperature Sensor Circuit Low

Battery thermometer sensor output value is abnormally low for 0.5 seconds or more with the ignition switch ON

(1 trip detection logic)

  • Battery current sensor assembly (battery thermometer sensor)

  • ECM

  • Wire harness or connector

Does not come on

DTC stored

P0517

Battery Temperature Sensor Circuit High

Battery thermometer sensor output value is abnormally high for 0.5 seconds or more with the ignition switch ON

(1 trip detection logic)

  • Battery current sensor assembly (battery thermometer sensor)

  • ECM

  • Wire harness or connector

Does not come on

DTC stored

WIRING DIAGRAM

A299199E01

PROCEDURE

  1. INSPECT BATTERY CURRENT SENSOR ASSEMBLY

    1. Inspect the battery current sensor assembly.

      Click here

      Result

      Result

      OK

      NG
    NG

    REPLACE BATTERY CURRENT SENSOR ASSEMBLY

    Click here

    OK

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

    1. Disconnect the B76 ECM connector.

    2. Disconnect the B72 battery current sensor assembly connector.

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

      Standard Resistance (Check for Open)

      Tester Connection

      Condition

      Specified Condition

      B76-77 (EIB) - B72-4 (E2)

      Always

      Below 1 Ω

      B76-75 (VCIB) - B72-2 (VC5)

      Always

      Below 1 Ω

      B76-115 (THB) - B72-1 (THB)

      Always

      Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection

      Condition

      Specified Condition

      B76-77 (EIB) or B72-4 (E2) - Body ground

      Always

      10 kΩ or higher

      B76-75 (VCIB) or B72-2 (VC5) - Body ground

      Always

      10 kΩ or higher

      B76-115 (THB) or B72-1 (THB) - Body ground

      Always

      10 kΩ or higher

    Result

    Result

    OK

    NG
    OK

    REPLACE ECM

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR