HYBRID BATTERY SYSTEM, Diagnostic DTC:P0A9C-123, P0AC6-123, P0ACB-123, P3065-123

DTC Code	DTC Name
P0A9C-123	Hybrid Battery Temperature Sensor "A" Range / Performance
P0AC6-123	Hybrid Battery Temperature Sensor "B" Range / Performance
P0ACB-123	Hybrid Battery Temperature Sensor "C" Range / Performance
P3065-123	Hybrid Battery Temperature Sensor Range/Performance Stuck "A"

DESCRIPTION

The battery temperature sensors are provided at 3 locations of the HV battery. The resistance of the thermistor, which is built into each battery temperature sensor, varies in accordance with changes in the HV battery temperature. The lower the battery temperature, the higher the thermistor resistance. Conversely, the higher the temperature, the lower the resistance. The battery smart unit uses the battery temperature sensors to detect the HV battery temperature, and sends the detected value to the hybrid vehicle control ECU. Based on the results of this detection, the hybrid vehicle control ECU controls the blower fan. (The blower fan starts when HV battery temperature rises above a predetermined level.)

Temperature Sensor Identification Cross Reference Table

DTC Title Sensor	Battery Temperature Sensor	GTS Display
A	0	1
B	1	2
C	2	3

Tech Tips

For example, sensor A in the DTC title is battery temperature sensor (No. 0). This sensor is displayed as Temp of Batt TB1 in the Data List.

DTC No.	INF Code	DTC Detection Condition	Trouble Area
P0A9C	123	The performance of battery temperature sensor 0 is abnormal and its output is stuck. (2 trip detection logic)	HV battery Battery smart unit Wire harness or connector
P0AC6	123	The performance of battery temperature sensor 1 is abnormal and its output is stuck. (2 trip detection logic)
P0ACB	123	The performance of battery temperature sensor 2 is abnormal and its output is stuck. (2 trip detection logic)
P3065	123	The performance of any battery temperature sensor is abnormal, the difference in output between it and other battery temperature sensors is excessively large. (1 trip detection logic)

Related Data List
DTC No.	Data List
P0A9C-123 P0AC6-123 P0ACB-123 P3065-123	Temp of Batt TB1 to 3

The following items can be helpful when performing repairs:

Data List

Vehicle Spd
Ambient Temperature

Tech Tips

After leaving the vehicle for 1 day, the values of data monitor item "Temperature of Battery TB1 to TB3" should be equal to the outside temperature. Comparison of the values of "Temperature of Battery TB1 to TB3" at this time can be used to check for a malfunction.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION:

Before inspecting the high-voltage system, take safety precautions to prevent electrical shocks, such as wearing insulated gloves and removing the service plug grip. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
After removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work Click here.

Tech Tips

At least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
When disposing of an HV battery, make sure to return it through an authorized collection agent who is capable of handling it safely. If the HV battery is returned via the manufacturer specified route, it will be returned properly and in a safe manner by an authorized collection agent.

Note

After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work Click here.

Tech Tips

If DTC P0A9C-123, P0AC6-123 or P0ACB-123 is output, clear the DTCs, perform the following procedure, and check that the same DTC (including pending DTC) is not output after the repair.

Drive the vehicle for approximately 10 minutes according to the freeze frame data items "Vehicle Spd", "Accelerator Degree", "Temp of Batt TB1 to TB3" and "Power Resource IB".

Check that the output of each battery temperature sensor varies.
Check that the difference in output between each battery temperature sensor is not excessively large.

If DTC P3065-123 is output, clear the DTCs, perform the following procedure, and check that the same DTC is not output after the repair.

Turn the ignition switch to ON (IG) and wait for 10 seconds or more.

Check that the difference in output between each battery temperature sensor is not excessively large.

PROCEDURE

CHECK DTC OUTPUT (HYBRID CONTROL)

Connect the GTS to the DLC3.
Turn the ignition switch to ON (IG).
Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
Check and record any HV system DTCs, INF codes and freeze frame data.

Read output DTCs Click here.

Result

Result	Proceed to
P0AFC-123 is not output.	A
P0AFC-123 is also output.	B

Turn the ignition switch off.
Disconnect the GTS from the DLC3.

GO TO DTC CHART (P0AFC-123) Click here

CHECK INSTALLATION OF BATTERY TEMPERATURE SENSOR

CAUTION:

Be sure to wear insulated gloves and protective goggles.

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 manual because this may cause a malfunction.
Remove the upper hybrid battery cover sub-assembly Click here.

Visually check the installation condition of the relevant battery temperature sensor.

Text in Illustration
*1	Battery Temperature Sensor 0	*2	Battery Temperature Sensor 1
*3	Battery Temperature Sensor 2	-	-

Standard Condition
Each battery temperature sensor is installed in the correct location with the correct orientation and its claws are engaged securely.

Result

Result	Proceed to
Each battery temperature sensor is installed in the correct location with the correct orientation and its claws are engaged securely.	A
Claws are damaged.	B
Any of battery temperature sensors are not installed correctly, but claws are not damaged.	C

Note

Do not use a stick or similar object to push on the sensors when inspecting them. Doing so may result in damage to the sensors.

Install the upper hybrid battery cover sub-assembly.

REPLACE HV BATTERY Click here

INSTALL PARTS CORRECTLY

CHECK HV BATTERY (BATTERY TEMPERATURE SENSOR)

CAUTION:

Be sure to wear insulated gloves.

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 manual because this may cause a malfunction.
Remove the No. 1 hybrid battery shield sub-assembly Click here.
Disconnect connectors d1 and M39 from the battery smart unit.

Text in Illustration
*a	Rear view of wire harness connector (to Battery Smart Unit)

Measure the resistance of the circuit for the malfunctioning sensor (battery temperature sensor 0 to 2).

Tester Connection
Tester Connection	Battery Temperature Sensor No.
X1-4 (TBO) - X1-10 (GBO)	0
X1-3 (TB1) - X1-9 (GB1)	1
X1-2 (TB2) - X1-8 (GB2)	2

Standard Resistance

Thermistor Temperature	Switch Condition	Specified Condition
0°C (32°F)	Ignition switch off	26.7 to 27.8 kΩ
25°C (77°F)	Ignition switch off	9.9 to 10.1 kΩ
40°C (104°F)	Ignition switch off	5.73 to 5.92 kΩ

Text in Illustration
*a	Rear view of wire harness connector (to Battery Smart Unit)

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

Standard Resistance

Tester Connection	Switch Condition	Standard Resistance
X1-4 (TBO) - K32-3 (IGCT)	Ignition switch off	10 kΩ or more
X1-4 (TBO) - K32-6 (GND)	Ignition switch off	10 kΩ or more
X1-10 (GBO) - K32-3 (IGCT)	Ignition switch off	10 kΩ or more
X1-10 (GBO) - K32-6 (GND)	Ignition switch off	10 kΩ or more
X1-3 (TB1) - K32-3 (IGCT)	Ignition switch off	10 kΩ or more
X1-3 (TB1) - K32-6 (GND)	Ignition switch off	10 kΩ or more
X1-9 (GB1) - K32-3 (IGCT)	Ignition switch off	10 kΩ or more
X1-9 (GB1) - K32-6 (GND)	Ignition switch off	10 kΩ or more
X1-2 (TB2) - K32-3 (IGCT)	Ignition switch off	10 kΩ or more
X1-2 (TB2) - K32-6 (GND)	Ignition switch off	10 kΩ or more
X1-8 (GB2) - K32-3 (IGCT)	Ignition switch off	10 kΩ or more
X1-8 (GB2) - K32-6 (GND)	Ignition switch off	10 kΩ or more
X1-1 (TCO) - K32-3 (IGCT)	Ignition switch off	10 kΩ or more
X1-1 (TCO) - K32-6 (GND)	Ignition switch off	10 kΩ or more
X1-7 (GCO) - K32-3 (IGCT)	Ignition switch off	10 kΩ or more
X1-7 (GCO) - K32-6 (GND)	Ignition switch off	10 kΩ or more

Connect the battery smart unit connectors.
Install the No. 1 hybrid battery shield sub-assembly.

REPLACE BATTERY SMART UNIT Click here

CHECK HARNESS AND CONNECTOR (BATTERY TEMPERATURE SENSOR)

CAUTION:

Be sure to wear insulated gloves and protective goggles.

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 manual because this may cause a malfunction.
Remove the upper hybrid battery cover sub-assembly Click here.

Check the wire harness and connectors of the battery temperature sensor 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.

Tech Tips

Because the battery harness is not available as a supply part, if the harness cannot be repaired, replace the HV battery assembly.

Install the upper hybrid battery cover sub-assembly.

REPLACE HV BATTERY Click here

REPAIR HARNESS OR CONNECTOR (BATTERY TEMPERATURE SENSOR)