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

WARNING: This page is about a different variant/trim than selected.

CHECK CONNECTOR CONNECTION CONDITION (BATTERY TEMPERATURE SENSOR)
1. Check the connections of the battery temperature sensor connector.
  OK
  
  The connectors are connected securely and there are no contact problems.
NG → CONNECT SECURELY

OK: Go to next step

INSPECT BATTERY (BATTERY THERMOMETER SENSOR)

Disconnect the O24 battery thermometer sensor connector.

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

Fig 1: Identifying O24 Battery Thermometer Sensor Connector Terminal Identification

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance

Tester Connection	Temperature	Specified Condition
THB (O24-2) - E2 (O24-1)	0°C (32°F)	5.0 to 5.3 kΩ
	20°C (68°F)	2.3 to 2.5 kΩ
	40°C (104°F)	1.1 to 1.3 kΩ

HINT:

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

NG → REPLACE AUXILIARY BATTERY

OK: Go to next step

CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR) See step 3
NG → CONNECT SECURELY

OK: Go to next step

CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - BATTERY THERMOMETER SENSOR)

Disconnect the A61 hybrid vehicle control ECU connector.

Fig 2: Identifying A61 Hybrid Vehicle Control ECU Connector Terminal Identification
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard resistance (Check for open)

Tester Connection	Specified Condition
THB (A61-83) - THB (O24-2)	Below 1 Ω
EIB (A61-84) - E2 (O24-1)	Below 1 Ω

Standard resistance (Check for short)

Tester Connection	Specified Condition
THB (A61-83) or THB (O24-2) - Body ground	10 kΩ or more
EIB (A61-84) or E2 (O24-1) - Body ground	10 kΩ or more

Turn the power switch on (IG).

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

Standard voltage

Tester Connection	Specified Condition
THB (A61-83) or THB (O24-2) - Body ground	Below 1 V

NOTE:

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

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

CHECK FOR INTERMITTENT PROBLEMS
1. Check for intermittent problems. Refer to CHECK FOR INTERMITTENT PROBLEMS .
NG → REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

OK → See step 6
REPLACE HYBRID VEHICLE CONTROL ECU. Refer to REMOVAL