DTC P0516-769: Battery Temperature Sensor Circuit Low; DTC P0517-770: Battery Temperature Sensor Circuit High: Procedure

NG → CONNECT SECURELY 

OK: Go to next step 

1. Check the connection of the thermistor assembly connector.
   Fig 1: Checking Connector Connection Condition (Thermistor Assembly Connector)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK

   The connector is connected securely and there are no contact problems.

NG → CONNECT SECURELY 

OK: Go to next step 

1. Disconnect connector O56 from the thermistor assembly.
2. Measure the resistance according to the value(s) in the table below.
   Fig 2: Checking Thermistor Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   O56-2 (THB) - O56-1 (E2)	50° F (10°C)	3.00 to 3.73 kΩ
   	77° F (25°C)	1.60 to 1.80 kΩ
   	104° F (40°C)	0.80 to 1.00 kΩ

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Thermistor Assembly)

3. Connect the thermistor assembly connector.

NG → REPLACE THERMISTOR ASSEMBLY 

OK: Go to next step 

1. Disconnect connector O56 from the thermistor assembly.
2. Disconnect connector D72 from the hybrid vehicle control ECU.
   Fig 3: Checking Harness And Connector (Hybrid Vehicle Control ECU - Thermistor Assembly)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Switch Condition	Specified Condition
   D72-28 (THB) - O56-2 (THB)	Ignition switch off	Below 1 Ω
   D72-30 (ETHB) - O56-1 (E2)	Ignition switch off	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Switch Condition	Specified Condition
   D72-28 (THB) or O56-2 (THB) - Body ground and other terminals	Ignition switch off	10 kΩ or higher
   D72-30 (ETHB) or O56-1 (E2) - Body ground and other terminals	Ignition switch off	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Thermistor Assembly)
   *b	Rear view of wire harness connector (to Hybrid Vehicle Control ECU)

4. Turn the ignition switch to ON.
5. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   D72-28 (THB) or O56-2 (THB) - Body ground	Ignition switch ON	Below 1 V

   NOTE:

   Turning the ignition switch to ON with the hybrid vehicle control ECU connectors disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

6. Turn the ignition switch off.
7. Connect the thermistor assembly connector.
8. Connect the hybrid vehicle control ECU connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   5