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

1. Check the connections of the hybrid vehicle control ECU connectors.

   OK

   The connectors are connected securely and there are no contact problems.

NG → CONNECT SECURELY 

OK: Go to next step 

1. Check the connection of the battery temperature sensor connector.
   Fig 1: Locating Battery Temperature Sensor 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 the battery (battery temperature sensor) connector.
2. Measure the resistance according to the value(s) in the table below.
   Fig 2: Identifying S70 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance

   Tester Connection	Condition	Specified Condition
   S70-2 (THB) - S70-1 (E2)	32°F (0°C)	5.0 to 5.3 kΩ
   	68°F (20°C)	2.3 to 2.5 kΩ
   	104°F (40°C)	1.1 to 1.3 kΩ

   HINT: 

   The battery temperature sensor is not available separately. If it requires replacement, replace the auxiliary battery.

NG → See step   6 

OK: Go to next step 

1. Disconnect connectors A75 and A74 from the hybrid vehicle control ECU.
   Fig 3: Checking Harness And Connector (Hybrid Vehicle Control ECU -- Battery Temperature Sensor)

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

   Standard resistance (Check for open)

   Tester Connection	Switch Condition	Specified Condition
   A75-30 (THB) - S70-2 (THB)	Power switch off	Below 1 Ω
   A74-5 (E2) - S70-1 (E2)	Power switch off	Below 1 Ω

   Standard resistance (Check for short)

   Tester Connection	Switch Condition	Specified Condition
   A75-30 (THB) or S70-2 (THB) - Body ground and other terminals	Power switch off	10 kΩ or higher
   A74-5 (E2) or S70-1 (E2) - Body ground and other terminals	Power switch off	10 kΩ or higher

3. Turn the power switch on (IG).
4. Measure the voltage according to the value(s) in the table below.

   Standard voltage

   Tester Connection	Switch Condition	Specified Condition
   A75-30 (THB) or S70-2 (THB) - Body ground	Power switch on (IG)	Below 1 V

   NOTE:

   Turning the power switch on (IG) with the hybrid vehicle control ECU connectors disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   5