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 ECM. A 5 V power supply voltage is supplied to the battery temperature sensor from terminal THB of the ECM 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 ECM protects the battery by reducing the charge current when the battery temperature is high.

A002MI7E04
*a Resistance [kΩ]
*b Temperature [°C]
DTC Code DTC Detection Condition Trouble Area
P0516 When the ignition switch is ON, the battery temperature sensor output is below 0.2 V for 0.5 seconds or more (1 trip detection logic).

  • Battery current sensor assembly

  • ECM

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

  • Battery current sensor assembly

  • ECM

  • Harness or connector

WIRING DIAGRAM

A002QUTE03
*a Battery Current Sensor
*b Battery Temperature Sensor
*c Battery Current Sensor Assembly

PROCEDURE


  1. INSPECT BATTERY CURRENT SENSOR ASSEMBLY


    1. Inspect the battery current sensor assembly Click here.


    NG

    REPLACE BATTERY CURRENT SENSOR ASSEMBLY Click here

    OK

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


    1. Disconnect the C111 ECM connector.

    2. Disconnect the C50 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
      C111-117 (VCIB) - C50-2 (VC5) Always Below 1 Ω
      C111-118 (EIB) - C50-4 (E2)
      C111-87 (THB) - C50-1 (THB)
      C111-117 (VCIB) or C50-2 (VC5) - Body ground Always 10 kΩ or higher
      C111-118 (EIB) or C50-4 (E2) - Body ground
      C111-87 (THB) or C50-1 (THB) - Body ground

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR