DTC P0A9B-11: Hybrid/EV Battery Temperature Sensor "A" Circuit Short to Ground; DTC P0A9B-15: Hybrid/EV Battery Temperature Sensor "A" Circuit Short to Auxiliary Battery or Open; DTC P0AC5-11: Hybrid/EV Battery Temperature Sensor "B" Circuit Short to Ground; DTC P0AC5-15: Hybrid/EV Battery Temperature Sensor "B" Circuit Short to Auxiliary Battery or Open; DTC P0ACA-11: Hybrid/EV Battery Temperature Sensor "C" Circuit Short to Ground; DTC P0ACA-15: Hybrid/EV Battery Temperature Sensor "C" Circuit Short to Auxiliary Battery or Open; DTC P0AE8-11: Hybrid/EV Battery Temperature Sensor "D" Circuit Short to Ground; DTC P0AE8-15: Hybrid/EV Battery Temperature Sensor "D" Circuit Short to Auxiliary Battery or Open; DTC P0BC2-11: Hybrid/EV Battery Temperature Sensor "E" Circuit Short to Ground; DTC P0BC2-15: Hybrid/EV Battery Temperature Sensor "E" Circuit Short to Auxiliary Battery or Open; DTC P0C33-11: Hybrid/EV Battery Temperature Sensor "F" Circuit Short to Ground; DTC P0C33-15: Hybrid/EV Battery Temperature Sensor "F" Circuit Short to Auxiliary Battery or Open [12/2019 - 11/2023]: Procedure

1. Check for DTCs.

   Powertrain > Hybrid Control > Trouble Codes 

   Result

   Result	Proceed to
   P0AFC-00, P0AFC-96 or P308A-12 is not output.	A
   P0AFC-00, P0AFC-96 or P308A-12 is also output.	B

2. Turn the ignition switch off.

Result: 

B 

GO TO DTC CHART (HYBRID CONTROL SYSTEM) 

Refer to DIAGNOSTIC TROUBLE CODE CHART [12/2019 - 09/2020] , or refer to DIAGNOSTIC TROUBLE CODE CHART [09/2020 - 10/2021] , or refer to DIAGNOSTIC TROUBLE CODE CHART [10/2021 - 11/2023]

Result: 

A 

See step  2

1. Read the Data List.

   Powertrain > Hybrid Control > Data List 

   Tester Display
   Hybrid Battery Temperature 1
   Hybrid Battery Temperature 2
   Hybrid Battery Temperature 3
   Hybrid Battery Temperature 4
   Hybrid Battery Temperature 5
   Hybrid Battery Temperature 6

   HINT: 

   A malfunctioning sensor (battery temperature sensor 0, 1, 2, 3, 4 or 5) can be determined by comparing the output temperature of the 6 battery temperature sensors.

2. Turn the ignition switch off.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  3

1. Check that the service plug grip is not installed.
   NOTE:

   After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair information because this may cause a malfunction.

2. Remove the HV battery junction block assembly.

   Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023]

3. Check the connections of the z12 battery voltage sensor connector.

   Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [12/2019 - ]

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK

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

   Result

   Proceed to
   OK
   NG

4. Install the HV battery junction block assembly.

Result: 

NG 

CONNECT SECURELY 

Result: 

OK 

See step  4

Refer to PROCEDURE - Step 3

Result

Result: 

OK 

REPLACE BATTERY VOLTAGE SENSOR 

Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023]

Result: 

NG 

See step  5

1. Check that the service plug grip is not installed.
   NOTE:

   After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair information because this may cause a malfunction.

2. Remove the upper HV battery cover sub-assembly.

   Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023]

3. Check the wire harness and connectors of the battery temperature sensors for abnormalities by sight and touch.

   Specified Condition

   There are no open or short circuits in the wire harness and connectors. There are no short circuits to other wire harnesses.

4. Install the upper HV battery cover sub-assembly.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE HYBRID BATTERY THERMISTOR 

Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023]

Result: 

NG 

REPAIR HARNESS OR CONNECTOR (BATTERY TEMPERATURE SENSOR)