CHARGING SYSTEM, Diagnostic DTC:P0516, P0517

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.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK BATTERY CURRENT SENSOR ASSEMBLY

   
   
   1. 

      Text in Illustration

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

      Disconnect the C50 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

   CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BATTERY CURRENT SENSOR) Click here

   C

   REPLACE BATTERY CURRENT SENSOR ASSEMBLY Click here

   A

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

   
   
   1. 

      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 H70 power management control ECU connector.

   2. Disconnect the C50 battery current sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition H70-23 (VC) - C50-2 (VC5) Always Below 1 Ω H70-25 (E2) - C50-4 (E2) H70-28 (THB) - C50-1 (THB) H70-23 (VC) - Body ground Always 10 kΩ or higher H70-25 (E2) - Body ground H70-28 (THB) - Body ground

      Result

      Result		Proceed to
      OK	for LHD	A
      	for RHD	B
      NG		C

   
   

   B

   REPLACE POWER MANAGEMENT CONTROL ECU Click here

   C

   REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - BATTERY CURRENT SENSOR)

   A

   REPLACE POWER MANAGEMENT CONTROL ECU Click here

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

   
   
   1. 

      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 H73 power management control ECU connector.

   2. Disconnect the C50 battery current sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition H73-12 (VC) - C50-2 (VC5) Always Below 1 Ω H73-18 (E2) - C50-4 (E2) H73-15 (THB) - C50-1 (THB) H73-12 (VC) - Body ground Always 10 kΩ or higher H73-18 (E2) - Body ground H73-15 (THB) - Body ground

      Result

      Result		Proceed to
      OK	for LHD	A
      	for RHD	B
      NG		C

   
   

   B

   REPLACE POWER MANAGEMENT CONTROL ECU Click here

   C

   REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - BATTERY CURRENT SENSOR)

   A

   REPLACE POWER MANAGEMENT CONTROL ECU Click here