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 voltage sensor uses the battery temperature sensors to detect the HV battery temperature, and sends the detected value to the power management control ECU. Based on the results of this detection, the power management 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 column is battery temperature sensor (No. 0). This sensor is displayed as Temp of Batt TB1 in the Data List.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Warning Indicate
P0A9C-123	Hybrid Battery Temperature Sensor "A" Range / Performance	When the battery temperature sensor performance is abnormal (1 trip detection/2 trip detection)	HV battery Battery voltage sensor Wire harness or connector	Comes on	Comes on
P0AC6-123	Hybrid Battery Temperature Sensor "B" Range / Performance	When the battery temperature sensor performance is abnormal (1 trip detection/2 trip detection)	HV battery Battery voltage sensor Wire harness or connector	Comes on	Comes on
P0ACB-123	Hybrid Battery Temperature Sensor "C" Range / Performance	When the battery temperature sensor performance is abnormal (1 trip detection/2 trip detection)	HV battery Battery voltage sensor Wire harness or connector	Comes on	Comes on
P3065-123	Hybrid Battery Temperature Sensor Range/Performance Stuck "A"	When the battery temperature sensor performance is abnormal (1 trip detection/2 trip detection)	HV battery Battery voltage sensor Wire harness or connector	Comes on	Comes on

WIRING DIAGRAM

INSPECTION PROCEDURE

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.

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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 power 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.

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PROCEDURE

CHECK DTC OUTPUT (HYBRID CONTROL)

Result

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

Connect the GTS to the DLC3.
Turn the power switch on (IG).
Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

Read output DTCs.

Result

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

Powertrain > Hybrid Control > Trouble Codes

Turn the power 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 power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.
Remove the upper hybrid battery cover sub-assembly.

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

*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 power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.
Remove the No. 2 hybrid battery intake duct.

Click here
Disconnect the z8 and L48 battery voltage sensor connectors.

*a	Rear view of wire harness connector (to Battery Voltage Sensor)

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

Tester Connection

Tester Connection	Battery Temperature Sensor No.
z8-4 (TBO) - z8-10 (GBO)	0
z8-3 (TB1) - z8-9 (GB1)	1
z8-2 (TB2) - z8-8 (GB2)	2

Standard Resistance

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

*a	Rear view of wire harness connector (to battery Voltage Sensor)

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

Standard Resistance

Tester Connection	Condition	Specified Condition
z8-4 (TBO) - L48-3 (IGCT)	Power switch off	10 kΩ or more
z8-4 (TBO) - L48-6 (GND)	Power switch off	10 kΩ or more
z8-10 (GBO) - L48-3 (IGCT)	Power switch off	10 kΩ or more
z8-10 (GBO) - L48-6 (GND)	Power switch off	10 kΩ or more
z8-3 (TB1) - L48-3 (IGCT)	Power switch off	10 kΩ or more
z8-3 (TB1) - L48-6 (GND)	Power switch off	10 kΩ or more
z8-9 (GB1) - L48-3 (IGCT)	Power switch off	10 kΩ or more
z8-9 (GB1) - L48-6 (GND)	Power switch off	10 kΩ or more
z8-2 (TB2) - L48-3 (IGCT)	Power switch off	10 kΩ or more
z8-2 (TB2) - L48-6 (GND)	Power switch off	10 kΩ or more
z8-8 (GB2) - L48-3 (IGCT)	Power switch off	10 kΩ or more
z8-8 (GB2) - L48-6 (GND)	Power switch off	10 kΩ or more
z8-1 (TCO) - L48-3 (IGCT)	Power switch off	10 kΩ or more
z8-1 (TCO) - L48-6 (GND)	Power switch off	10 kΩ or more
z8-7 (GCO) - L48-3 (IGCT)	Power switch off	10 kΩ or more
z8-7 (GCO) - L48-6 (GND)	Power switch off	10 kΩ or more

Reconnect the z8 and L48 battery voltage sensor connectors.

Install the No. 2 hybrid battery intake duct.

Result

Proceed to
OK
NG

REPLACE BATTERY VOLTAGE SENSOR 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 power switch 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.

Result

Proceed to
OK
NG

REPLACE HV BATTERY Click here

REPAIR HARNESS OR CONNECTOR