DTC    P0516    Battery Temperature Sensor Circuit Low

DTC    P0517    Battery Temperature Sensor Circuit High

for Preparation Click here


DESCRIPTION

A110648E01
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 power management control ECU 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 less than 0.2 V for 0.5 seconds or more with the ignition switch ON
(1-trip detection logic)
  1. Battery current sensor assembly (battery temperature sensor)
  2. Short to GND in battery temperature sensor circuit
  3. Power management control ECU
P0517
Battery temperature sensor output value is more than 4.81 V for 0.5 seconds or more with the ignition switch ON
(1-trip detection logic)
  1. Battery current sensor assembly (battery temperature sensor)
  2. Open in battery temperature sensor circuit
  3. Power management control ECU

WIRING DIAGRAM

Refer to DTC P1550 (Click here).

INSPECTION PROCEDURE

1.INSPECT BATTERY CURRENT SENSOR ASSEMBLY


    A193670E07

  1. Disconnect the cable from the negative (-) battery terminal.

  1. Disconnect the battery current sensor assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    B10-1 (THB) - B10-4 (E2)
    		20 to 30°C (68 to 86°F)
    		1.5 to 2.5 kΩ
    B10-2 (VC5) - B10-4 (E2)
    		Always
    		3 to 10 kΩ

    Text in Illustration 
    *1
    		Component without harness connected
    (Battery Current Sensor Assembly)

  1. 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.

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

  1. w/o Entry and Start System

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    D37-15 (THB) - B10-1 (THB)
    		Always
    		Below 1 Ω
    D37-18 (E2) - B10-4 (E2)
    D37-12 (VC) - B10-2 (VC5)
    D37-15 (THB) or B10-1 (THB) - Body ground
    		Always
    		10 kΩ or higher
    D37-18 (E2) or B10-4 (E2) - Body ground
    D37-12 (VC) or B10-2 (VC5) - Body ground

  1. w/ Entry and Start System

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    D36-28 (THB) - B10-1 (THB)
    		Always
    		Below 1 Ω
    D36-25 (E2) - B10-4 (E2)
    D36-23 (VC) - B10-2 (VC5)
    D36-28 (THB) or B10-1 (THB) - Body ground
    		Always
    		10 kΩ or higher
    D36-25 (E2) or B10-4 (E2) - Body ground
    D36-23 (VC) or B10-2 (VC5) - Body ground



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE POWER MANAGEMENT CONTROL ECU (Click here)