HYBRID BATTERY SYSTEM, Diagnostic DTC:P0AAE-123, P0AAF-123, P0AB3-123, P0AB4-123, P3103-123

DTC Code	DTC Name
P0AAE-123	Hybrid Battery Pack Air Temperature Sensor "A" Circuit Low
P0AAF-123	Hybrid Battery Pack Air Temperature Sensor "A" Circuit High
P0AB3-123	Hybrid Battery Pack Air Temperature Sensor "B" Circuit Low
P0AB4-123	Hybrid Battery Pack Air Temperature Sensor "B" Circuit High
P3103-123	EV Battery Pack Air Temperature Sensor "A" / "B" Correlation

DESCRIPTION

The inlet air temperature sensor (battery) is mounted on the HV battery. The resistance of the sensor varies in accordance with changes in the intake air temperature. The characteristics of the inlet air temperature sensor are the same as those of the battery temperature sensor Click here. The battery smart unit uses signals from the inlet air temperature sensor to control the air volume of the battery cooling blower assembly.

DTC No.	INF Code	DTC Detection Condition	Trouble Area
P0AAE	123	When the temperature indicated by the inlet air temperature sensor is lower than a predetermined limit (open circuit) or is higher than a predetermined limit (short circuit)(1 trip detection).	No. 2 hybrid vehicle supply stack sub-assembly Battery smart unit Wire harness or connector Hybrid battery junction block assembly
P0AAF
P0AB3
P0AB4
P3103		The intake air temperature sensor value exceeds the upper or lower thresholds.

Tech Tips

After confirming that a DTC is output, use the GTS to check "Inhaling Air Temp" in the HV ECU data list.

Displayed Temperature	Malfunction
-45 °C (-49 °F) or less	Open or +B short circuit
95 °C (203 °F) or more	GND short

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0A9C-123 Click here.

Refer to the wiring diagram for DTC P0ABF-123 Click here.

INSPECTION PROCEDURE

CAUTION:

Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly or electric vehicle charger assembly, turn the power switch off. Also, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. 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

Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly and electric vehicle charger assembly.
When disposing of HV batteries and hybrid vehicle supply stack sub-assemblies, make sure to return them through an authorized collection agent who is capable of handling them safely. If they are returned via the manufacturer specified route, they will be returned properly and in a safe manner by an authorized collection agent.
Before returning the HV battery, make sure to perform recovery inspection Click here.
Before returning the hybrid vehicle supply stack sub-assembly, make sure to perform recovery inspection Click here.
Make a note of the output DTCs as some of them may be necessary for recovery inspection of the HV battery and hybrid vehicle supply stack sub-assemblies.

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 Click here.

Tech Tips

If a short to +B occurs in the battery current sensor, intake air temperature sensor, VMF fan motor voltage or battery temperature sensor, the following DTCs may be output simultaneously.

DTC No.	Relevant Diagnosis
P0ABF-123	Hybrid Battery Pack Current Sensor Circuit
P0C7F-123	Hybrid Battery Temperature Sensor "G" Circuit High
P0C84-123	Hybrid Battery Temperature Sensor "H" Circuit High
P0C8B-123	Hybrid Battery Temperature Sensor "I" Circuit High
P0C90-123	Hybrid Battery Temperature Sensor "J" Circuit High
P0C95-123	Hybrid Battery Temperature Sensor "K" Circuit High
P0C9A-123	Hybrid Battery Temperature Sensor "L" Circuit High
P0AAF-123	Hybrid Battery Pack Air Temperature Sensor "A" Circuit High
P0AB4-123	Hybrid Battery Pack Air Temperature Sensor "B" Circuit High
P33A8-123	Hybrid Battery Pack Air Temperature Sensor "C" Circuit High
P33AD-123	Hybrid Battery Pack Air Temperature Sensor "D" Circuit High
P0A85-123	Hybrid Battery Pack Cooling Fan 1 Control Circuit High

PROCEDURE

CHECK DTC OUTPUT (HYBRID CONTROL)

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

Read output DTCs Click here.

Result

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

Disconnect the GTS from the DLC3.

GO TO DTC CHART (P0AFC-123) Click here

READ VALUE USING GTS
1. Connect the GTS to the DLC3.
2. Turn the power switch on (IG).
3. Enter the following menus: Powertrain / Hybrid Control / Data List / Inhaling Air Temp.
  
  Tech Tips
  
  Compare the temperature of the 4 intake air temperature sensors to determine the sensor with the malfunction (Inhaling Air Temp).
NEXT
CHECK CONNECTOR CONNECTION CONDITION
CAUTION:

Be sure to wear insulated gloves and protective goggles.
1. 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.
2. Remove the No. 1 hybrid vehicle battery shield panel Click here.
3. Check the connections of the u2 and j2 connectors of the battery smart unit.
  
  OK
  
  The connectors are connected securely and there are no contact problems.
4. Install the No. 1 hybrid vehicle battery shield panel.
NG
CONNECT SECURELY

OK

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

CHECK INSTALLATION OF INLET AIR 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 No. 1 hybrid vehicle battery shield panel Click here.

Visually check the installation condition of the inlet air temperature sensor.

OK
The inlet air temperature sensor is installed in the correct location and its claws are engaged securely.

Result

Result	Proceed to
The inlet air temperature sensor is installed in the correct location and its claws are engaged securely	A
Inlet air temperature sensor is not installed correctly or claws are damaged.	B

Install the No. 1 hybrid vehicle battery shield panel.

REPLACE NO. 2 HYBRID VEHICLE SUPPLY STACK SUB-ASSEMBLY Click here

CHECK HV BATTERY (INLET AIR 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. 1 hybrid vehicle battery shield panel Click here.
Remove the No. 1 hybrid battery intake duct Click here.
Disconnect the u2 and j2 battery smart unit connectors.

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.

Tester Connection
Tester Connection	Inlet Air Temperature Sensor No.
j2-2(TC0) - j2-12(GC0)	0
j2-1(TC1) - j2-11(GC1)	1
u2-23(TC2) - u2-11(GC2)	2
u2-24(TC3) - u2-12(GC3)	3

Standard Resistance

Condition	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

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

Standard Resistance

Tester Connection	Condition	Specified Condition
j2-2 (TC0) - Body ground and other terminals	Power switch off	10 kΩ or higher
j2-12 (GC0) - Body ground and other terminals	Power switch off	10 kΩ or higher
j2-1 (TC1) - Body ground and other terminals	Power switch off	10 kΩ or higher
j2-11 (GC1) - Body ground and other terminals	Power switch off	10 kΩ or higher
j2-10 (TBO) - Body ground and other terminals	Power switch off	10 kΩ or higher
j2-20 (GBO) - Body ground and other terminals	Power switch off	10 kΩ or higher
j2-9 (TB1) - Body ground and other terminals	Power switch off	10 kΩ or higher
j2-19 (GB1) - Body ground and other terminals	Power switch off	10 kΩ or higher
j2-8 (TB2) - Body ground and other terminals	Power switch off	10 kΩ or higher
j2-18 (GB2) - Body ground and other terminals	Power switch off	10 kΩ or higher
j2-7 (TB3) - Body ground and other terminals	Power switch off	10 kΩ or higher
j2-17 (GB3) - Body ground and other terminals	Power switch off	10 kΩ or higher
j2-6 (TB4) - Body ground and other terminals	Power switch off	10 kΩ or higher
j2-16 (GB4) - Body ground and other terminals	Power switch off	10 kΩ or higher
j2-5 (TB5) - Body ground and other terminals	Power switch off	10 kΩ or higher
j2-15 (GB5) - Body ground and other terminals	Power switch off	10 kΩ or higher
u2-23 (TC2) - Body ground and other terminals	Power switch off	10 kΩ or higher
u2-11 (GC2) - Body ground and other terminals	Power switch off	10 kΩ or higher
u2-24 (TC3) - Body ground and other terminals	Power switch off	10 kΩ or higher
u2-12 (GC3) - Body ground and other terminals	Power switch off	10 kΩ or higher
u2-21 (TB6) - Body ground and other terminals	Power switch off	10 kΩ or higher
u2-9 (GB6) - Body ground and other terminals	Power switch off	10 kΩ or higher
u2-22 (TB7) - Body ground and other terminals	Power switch off	10 kΩ or higher
u2-10 (GB7) - Body ground and other terminals	Power switch off	10 kΩ or higher
u2-13 (TB8) - Body ground and other terminals	Power switch off	10 kΩ or higher
u2-1 (GB8) - Body ground and other terminals	Power switch off	10 kΩ or higher
u2-14 (TB9) - Body ground and other terminals	Power switch off	10 kΩ or higher
u2-2 (GB9) - Body ground and other terminals	Power switch off	10 kΩ or higher
u2-15 (TB10) - Body ground and other terminals	Power switch off	10 kΩ or higher
u2-3 (GB10) - Body ground and other terminals	Power switch off	10 kΩ or higher
u2-17 (TB11) - Body ground and other terminals	Power switch off	10 kΩ or higher
u2-5 (GB11) - Body ground and other terminals	Power switch off	10 kΩ or higher

Connect the cable to the negative (-) auxiliary battery terminal.
Turn the power switch on (IG).

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

Standard Voltage

Tester Connection	Condition	Specified Condition
j2-2 (TC0) - Body ground	Power switch on (IG)	Below 1 V
j2-12 (GC0) - Body ground	Power switch on (IG)	Below 1 V
j2-1 (TC1) - Body ground	Power switch on (IG)	Below 1 V
j2-11 (GC1) - Body ground	Power switch on (IG)	Below 1 V
j2-10 (TBO) - Body ground	Power switch on (IG)	Below 1 V
j2-20 (GBO) - Body ground	Power switch on (IG)	Below 1 V
j2-9 (TB1) - Body ground	Power switch on (IG)	Below 1 V
j2-19 (GB1) - Body ground	Power switch on (IG)	Below 1 V
j2-8 (TB2) - Body ground	Power switch on (IG)	Below 1 V
j2-18 (GB2) - Body ground	Power switch on (IG)	Below 1 V
j2-7 (TB3) - Body ground	Power switch on (IG)	Below 1 V
j2-17 (GB3) - Body ground	Power switch on (IG)	Below 1 V
j2-6 (TB4) - Body ground	Power switch on (IG)	Below 1 V
j2-16 (GB4) - Body ground	Power switch on (IG)	Below 1 V
j2-5 (TB5) - Body ground	Power switch on (IG)	Below 1 V
j2-15 (GB5) - Body ground	Power switch on (IG)	Below 1 V
u2-23 (TC2) - Body ground	Power switch on (IG)	Below 1 V
u2-11 (GC2) - Body ground	Power switch on (IG)	Below 1 V
u2-24 (TC3) - Body ground	Power switch on (IG)	Below 1 V
u2-12 (GC3) - Body ground	Power switch on (IG)	Below 1 V
u2-21 (TB6) - Body ground	Power switch on (IG)	Below 1 V
u2-9 (GB6) - Body ground	Power switch on (IG)	Below 1 V
u2-22 (TB7) - Body ground	Power switch on (IG)	Below 1 V
u2-10 (GB7) - Body ground	Power switch on (IG)	Below 1 V
u2-13 (TB8) - Body ground	Power switch on (IG)	Below 1 V
u2-1 (GB8) - Body ground	Power switch on (IG)	Below 1 V
u2-14 (TB9) - Body ground	Power switch on (IG)	Below 1 V
u2-2 (GB9) - Body ground	Power switch on (IG)	Below 1 V
u2-15 (TB10) - Body ground	Power switch on (IG)	Below 1 V
u2-3 (GB10) - Body ground	Power switch on (IG)	Below 1 V
u2-17 (TB11) - Body ground	Power switch on (IG)	Below 1 V
u2-5 (GB11) - Body ground	Power switch on (IG)	Below 1 V

Note

Turning the power switch on (IG) with the service grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.

Turn the power switch off.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Reconnect the u2 and j2 battery smart unit connectors.
Install the No. 1 hybrid battery intake duct.
Install the No. 1 hybrid vehicle battery shield panel.

REPLACE NO. 2 HYBRID VEHICLE SUPPLY STACK SUB-ASSEMBLY Click here

CHECK BATTERY SMART UNIT (VIB VOLTAGE)

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. 1 hybrid vehicle battery shield panel Click here.
Remove the No. 1 hybrid battery intake duct Click here.
Connect the cable to the negative (-) auxiliary battery terminal.
Turn the power switch on (IG).

Text in Illustration
*a	Component with harness connected (Battery Smart Unit)

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

Standard Voltage

Tester Connection	Condition	Specified Condition
c5-2 (VIB) - c5-8 (GIB)	Power switch on (IG)	4.6 to 5.4 V

Note

Turning the power switch on (IG) with the service grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.

Turn the power switch off.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Install the No. 1 hybrid battery intake duct.
Install the No. 1 hybrid vehicle battery shield panel.

Click here

REPLACE BATTERY SMART UNIT Click here

CHECK HYBRID BATTERY JUNCTION BLOCK ASSEMBLY

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. 1 hybrid vehicle battery shield panel Click here.
Disconnect the c6 hybrid battery junction block assembly connector.
Connect the cable to the negative (-) auxiliary battery terminal.
Turn the power switch on (IG).

Text in Illustration
*a	Front view of wire harness connector (Battery Junction Block Assembly)

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

Standard Voltage

Tester Connection	Condition	Specified Condition
c6-1 (VIB) - c6-3 (GIB)	Power switch on (IG)	4.6 to 5.4 V

Note

Turning the power switch on (IG) with the service grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.

Turn the power switch off.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Install the No. 1 hybrid vehicle battery shield panel.

Click here

REPLACE HYBRID BATTERY JUNCTION BLOCK ASSEMBLY Click here

CHECK HARNESS AND CONNECTOR (HYBRID BATTERY JUNCTION BLOCK ASSEMBLY - BATTERY SMART UNIT)

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. 1 hybrid battery intake duct Click here.
Remove the No. 1 hybrid vehicle battery shield panel Click here.
Disconnect only the c5 battery smart unit connector.
Disconnect the c6 battery current sensor connector from the hybrid battery junction block assembly.

Text in Illustration
*a	Rear view of wire harness connector (to Battery Smart Unit)
*b	Front view of wire harness connector (to Hybrid Battery Junction Block Assembly)

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

Standard Resistance (Check for Open)

Tester Connection	Condition	Specified Condition
c5-7 (IB1) - c6- 2 (IB1)	Power switch off	Below 1 Ω
c5-8 (GIB) - c6- 3 (GIB)	Power switch off	Below 1 Ω
c5-1 (IB0) - c6- 4 (IB0)	Power switch off	Below 1 Ω
c5-2 (VIB) - c6- 1 (VIB)	Power switch off	Below 1 Ω

Standard Resistance (Check for Short)

Tester Connection	Condition	Specified Condition
c5-7 (IB1) or c6- 2 (IB1) - Body ground and other terminals	Power switch off	10 kΩ or higher
c5-8 (GIB) or c6- 3 (GIB) - Body ground and other terminals	Power switch off	10 kΩ or higher
c5-1 (IB0) or c6- 4 (IB0) - Body ground and other terminals	Power switch off	10 kΩ or higher
c5-2 (VIB) or c6- 1 (VIB) - Body ground and other terminals	Power switch off	10 kΩ or higher

Reconnect the c5 battery smart unit connector.
Reconnect the c6 battery current sensor connector to the hybrid battery junction block assembly.
Install the No. 1 hybrid battery intake duct.
Install the No. 1 hybrid vehicle battery shield panel.

REPAIR HARNESS OR CONNECTOR OR REPLACE NO. 2 HYBRID VEHICLE SUPPLY STACK SUB-ASSEMBLY Click here

REPLACE BATTERY SMART UNIT Click here